[amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at approx 20:10 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] SAT PC 32 question
Hi Folks, I wish to track two satellites (actually FUNcube and UKube) at the same time. The TLM for one is in cubesats.txt and the other is in tle-new.txt. Is there a way of displaying them both in the main window at the same time? When I select one, the other is automatically removed from the list. I have tired copying the tles for one into the other's file, and this works OK, but it rather tedious! The problem might be resolved when the elements for Ukube are included in the cubesats.txt file, but they will appear as A and B on the main display (bottom right hand corner), whereas I would like to display them both on the map simultaneously. Is there a way of doing this? Thanks for any help 73s Jim G3WM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] AO-73/FUNcube Operations
Hi Folks, Please note that this weekend AO-73/FUNcube will NOT be switched to permanent transponder mode. There have been several requests for it to remain in auto eclipse mode to support various events associated with YOTA. See http://www.ham-yota.eu/ So it will remain on the following schedule: - Full power beacon when in daylight - Low power beacon, plus transponder when in darkness Have a great weekend 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at approx 19:18 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73
Hi Folks, The FUNcube/AO-73 mode has been changed as at 1944 UTC to Auto Eclipse mode (ie transponder on when sat is in darkness, full power beacon when in daylight) Please note that it will NOT be commanded next Friday into full time eclipse mode. There is an important demonstration for school children at the Royal Institutes' London Faraday Lecture theatre next Sat, 5 July, so the sat will be in full power beacon mode when in sunlight all over that weekend. 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at approx 19:03 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at approx 20:24 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Re: [amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at approx 20:24 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Re: [amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at APPROX 22:37 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Re: [amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at 19:10 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at 19:15 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Mode change
Hi Folks, FUNcube/AO-73 is now in continuous transponder mode with low power beacon, as at 19:53 UTC. Change back to Auto eclipse mode planned for Sunday PM UTC. Enjoy the transponder 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Commanded
Hi Folks, Just to confirm that FUNcube/AO-73 is now in continuous transponder/low power beacon mode, as at 20:32 UTC. Planned that we will change back to 'normal' mode on Sunday evening UTC. Enjoy the transponder! 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 - Now in Full time low power beacon/ Transponder ON mode
Hi Folks, At approx 21:12 UTC this evening, AO-73 was switched into continuous lowpower beacon/ transponder ON Mode for radio amateurs use during the weekend. We'll be going back to normal mode at the end of the weekend. Enjoy! 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] SATPC 32 help pls
Hi Folks, I am using SATPC32. Is here a way to determine when a sat is in/out of eclipse? 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: SATPC 32 help pls
Erich, Many thanks for this! My problem was that I couldnt see for looking !! 73s Jim -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Erich Eichmann Sent: 29 April 2014 19:25 To: Burns Fisher; AMSAT-BB@amsat.org Subject: [amsat-bb] Re: SATPC 32 help pls The program displays Satellite in Sun or eclipsed in the upper left corner of the SatPC32 main window (above the date and time box). The program WinListen displays an E between date and time if the satellite is eclipsed. 73s, Erich, DK1TB Am 29.04.2014 15:40, schrieb Burns Fisher: You can certainly look at the sun terminator line on the map. If the entire visibility circle of the satellite on the earth is on the dark side of the terminator, the satellite is in eclipse.But I also remember seeing a little legend somewhere on the screen that says Satellite is in eclipse or something like that when it is. 73, Burns W2BFJ On Tue, Apr 29, 2014 at 7:00 AM, Jim Heck jiml...@zoho.com wrote: Hi Folks, I am using SATPC32. Is here a way to determine when a sat is in/out of eclipse? 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube / AO-73 Transponder Availability weekend 26/27 April 2014
Hi Folks, The FUNcube Dev team are holding a working meeting over this weekend. We may need the sat to be in 'Normal' mode (ie full power tlm) for some of the time for testing purposes. We will try and have the transponder on as much as we can, but if its not there when you expect it to be, please bear with us! 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Transponder plans for the future
Hi Folks, Following the 48 hour test last weekend, we have concluded that the battery temp does reduce slightly during full time transponder mode, but only by a degree C or so; it remains within specification. Hence we have decided in future to switch the satellite into 'forced eclipse mode', ie full time transponder and low power beacon at weekends. The aim is to significantly increase the availability of the transponder to radio amateurs. We will continue with this plan until further notice. We plan to switch to full time transponder mode during the first suitable pass over the UK on Friday evenings, normally between 19:30 and 22:30 UTC. If for some reason this is not possible, then the switch will be done on the first suitable pass on Saturday, normally between 09:30 and 12:00 UTC. We plan to switch the full time transponder mode off during a suitable pass on Sunday evenings (UK time), which normally occur between 1930 and 22:30 UTC. Again, if this is not possible the switch off will be made on Monday mornings, approx. 09:30 to 12:00 UTC. Do PLEASE NOTE that this schedule is totally reliant on the availability of command stations, who will do their very best to ensure it is maintained. We will not normally announce successful full time transponder mode on/off commands, but if it proves not possible to make one of them, then we will make a note here and on the FUNcube web site at www.funcube.org.uk/news. So please do enjoy the transponder, and use it any time you hear it on. We are always pleased to hear of your activity, so either leave a comment on the website, or email g3wgm -at- amsat.org. A recent QSO made by Paulo PV8DX can be seen at http://www.youtube.com/watch?v=nMVetMKnCMQ. Thanks for the report, Paulo! 73s Jim G3WGM 7 Apr 2014. ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Mode change.
Hi Folks, FUNcube/AO-73 was commanded to Auto Eclipse Mode (ie high power beacon when in sunlight, low power beacon + transponder when in eclipse) at approx 19:45 today. 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 mode switch
Hi Folks FUNcube/AO73 was switched into full time transponder mode/low power beacon at 21:30 UTC 4 Apr 2014 Please feel free to use the transponder. Enjoy. If all goes well we will leave the transponder full time on until Sunday evening UTC 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube-1/AO-73 Transponder plan for next weekend 5/6 Apr 2014
Hi Folks, We are planning to command FUNcube-1 into full time transponder mode on a suitable pass over the UK on the evening (likely 21:30 UTC) of Friday 4 Apr. If all goes well, we will leave it in transponder mode until the evening (likely 20:50 UTC) of Sunday 6 April. If you hear the transponder on, please feel free to use it! Enjoy! 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Mode change
Hi Folks As as 10:29 UTC, FUNcube is now in permanent amateur mode (low power beacon, plus transponder on). Planning to switch back to normal mode at approx 20:00 UTC today. 73s Jim G3WGM -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Jerry Buxton Sent: 29 March 2014 05:46 To: 'B J' Cc: amsat-bb@amsat.org Subject: [amsat-bb] Re: N American Satellite Activity UP Indeed, if the ham community gets involved because of the transponder, that is where the slow speed telemetry comes down and they then have a worldwide network collecting it for them! :-) Jerry -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of B J Sent: Saturday, March 29, 2014 12:34 AM To: n0jy Cc: amsat-bb@amsat.org Subject: [amsat-bb] Re: N American Satellite Activity UP On 3/29/14, n0jy n...@n0jy.org wrote: When Fox-1 is completed, the whole design kit and kaboodle will be published to shed the ITAR shroud (as we have done with what has been developed as we go along, in the AMSAT-NA Space Symposium Proceedings) and anyone who wants to build one can use it or adapt it (hopefully keeping the ham transponder!) for their CubeSat RF design and fly it in/from/for another country with their experiments. The idea being as JoAnne said, the radio part is proven and provides a platform so they can concentrate on their experiments and build a CubeSat that handily just happens to contain a transponder for hams during, or when they are done with, their experiments. Of course if ITAR restrictions are eased or removed, then AMSAT-NA could collaborate with other countries as well and incorporate their experiments as we are doing with our U.S. partners now. snip Thanks. I'll pass this onto the group. I figure that it might get much more support from the ham community if it had something for us. The satellite will be using some of the spectrum that's been allocated for amateur use, after all. 73s Bernhard VA6BMJ @ DO33FL ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: FUNcube/AO-73 Mode change
Hi Folks At 19:56 UTC, I commanded FUNcube back into 'auto eclipse mode', ie it will be on low power beacon + transponder when in eclipse, and full power beacon/no transponder when in sunlight 73s Jim G3WGM -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Jim Heck Sent: 29 March 2014 11:16 To: amsat-bb@amsat.org Subject: [amsat-bb] FUNcube/AO-73 Mode change Hi Folks As as 10:29 UTC, FUNcube is now in permanent amateur mode (low power beacon, plus transponder on). Planning to switch back to normal mode at approx 20:00 UTC today. 73s Jim G3WGM gs: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube/AO-73 Transponder Test - Sat 29 Mar 2014
Hi Folks, Results of last weekend's tests: the transponder was maintained ON for two orbits, and we did not see any noticeable fall in battery temperature. We are therefore proposing to repeat the test next Saturday (29 Mar), but leave the transponder on for a longer period. We will switch it on during the first pass over the UK (approx 10:30 UTC) and switch it off during one of the evening passes over UK, the first of which is at approx 20:00 UTC. We are particularly interested to receive TLM when the satellite is coming out of eclipse (ie when it should be at its coldest temp). So reception from suitablely located stations would be very welcome. If you hear the transponder on, please feel free to use it! 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FUNcube AO-73 now in full time transponder mode
Hi Folks, Just to let you know that at 09:29 UTC today I have switched AO-73's mode to be continuous transponder/low power beacon. The plan is to leave it in this mode for one or two complete orbits. Anyone decoding the tlm, please keep a watch on the Battery Temp - its important that it stays above -5 degs. Please feel free to use the transponder while we are in this mode. 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: FUNcube AO-73 now in full time transponder mode
Hi Folks, Update on FUNcube AO-73 mode change. I have now switched the sat back to 'auto eclipse' mode (at 12:45 UTC), such that in sunlight the full power beacon will be on, and when the sat is in eclipse the transponder/low power beacon will be on. Initial examination of the tlm makes me think that the battery temp didn't drop appreciably during the two orbits. The management team will discuss this tomorrow, and decide what the next step is! 73s Jim G3WGM -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Jim Heck Sent: 22 March 2014 09:36 To: 'amsat-bb' Subject: [amsat-bb] FUNcube AO-73 now in full time transponder mode Hi Folks, Just to let you know that at 09:29 UTC today I have switched AO-73's mode to be continuous transponder/low power beacon. The plan is to leave it in this mode for one or two complete orbits. Anyone decoding the tlm, please keep a watch on the Battery Temp - its important that it stays above -5 degs. Please feel free to use the transponder while we are in this mode. 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] AO-73 / FUNcube Full time Transponder Mode (Amateur Mode) Proposed Test Sat 22 Mar
Hi Folks, On 22 Mar, we will be commanding the satellite into transponder mode for one or two orbits so we can assess the effect of lower power being radiated by the sat on the battery temperature. We expect the sat to be put into full time transponder mode (aka amateur mode) during the first morning pass on Sat 22 Mar over the UK, ie at approximately 0930 UTC. We are aware that the on/off timings for the transponder are not now ideal, due to seasonal changes. In the coming months the situation will get worse such that in June the transponder will only be available for very short periods in the Northern Hemisphere. We are therefore planning to alter the schedule such that the transponder is on continuously at weekends, ie after approx 1900 UTC on Fridays, to Sunday evening. This will give radio amateurs a greater opportunity to use the transponder. Unfortunately there is no way of automating this schedule, so its maintenance will rely on the availability of command stations. Before implementing this schedule, it is necessary that we characterise the effect of maintaining transponder mode for long periods of time. We expect that the space craft will be slightly colder than when transmitting at full power, as the heat generated inside the spacecraft by the PA will be less. We are concerned that this lowering of the temperature may bring the battery temp lower than is advisable. Its specification is that it should not be charged if its temperature is below -5 degs, or some damage might be done to the battery. Currently the minimum temperature we see that the battery reaches is approximately -2 degs. If you notice that the transponder is open on 22 Mar, please feel free to use it. Please note that we have learnt from experience that commanding the sat is not an exact science, and that not all commands sent are received by the satellite, probably due to interference. We will announce on AMSAT-BB and on the FUNcube web site (www.funcube.org.uk) the progress of our tests. We would be very grateful if as many listening stations as possible receive the TLM and forward it to the warehouse on Sat 22 Mar. Thank you. 73s Jim, G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: FUNcube-1 (AO-73) Continuous Transponder Test Update
Hi Richard, Take a look here http://warehouse.funcube.org.uk/realtime.html?satelliteId=2#tabs-eps. The max/min readings cover the last 7 days. 73 Jim G3WGM -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Rich/wa4bue Sent: 18 March 2014 11:44 To: M5AKA; AMSAT BB Subject: [amsat-bb] Re: FUNcube-1 (AO-73) Continuous Transponder Test Update What are the temperature extremes on the satellites. God bless R W4BUE ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Software for IPad?
Hi All, As a new owner of an IPad, I would be interested in suggestions as the best sat tracking software. Tks and 73s Jim G3WGM ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] John Heaton G1YYH - SK
HI Folks, It is with a heavy heart that I have to report the death of AMSAT-UK committee member John Heaton, G1YYH. He died in hospital in Manchester UK on Christmas Eve, having been admitted two weeks earlier. He had not been well for several months prior to his death. John was the AMSAT-UK Webmaster for many years, and a regular attender at the annual AMSAT-UK Colloquium. He always gave his time and considerable expertise very generously. He will be terribly missed by his friends and colleagues. He was a real gentleman. There is more information about John on his personal web site at http://www.phers.co.uk/content/view/26/65/ 73s Jim G3WGM Hon Sec AMSAT-UK ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] AMSAT-UK Colloquium 31 Jul/1 Aug - Hotel booking deadline
Hi Folks, Only a few days to go before the Holiday Inn in Guildford, Surry releases our reserved rooms., they will do this on 9 July, so there isnt a great deal of time to be sure of a room. Please contact Emily Morris in the Hotel's Business Centre on +44 (0) 1483 784437 emily.mor...@ihg.com. Further info, prices etc is at http://www.uk.amsat.org/content/view/32/42/ Last year there were still rooms available after the deadline, but one or two delegates left it too late, and ended up in hotels in other parts of Guildford. SO PLEASE MAKE YOU BOOKING WITHIN THE NEXT WEEK TO BE SURE OF AVAILABILITY 73 Jim G3WGM Hon Sec AMSAT-UK ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: AMSAT Symposium Breaking News: Low Cost Airfares
Hi Folks, I will be booking my transatlantic flight over the next couple of days, and have a few questions. I wonder if anyone could help me? 1. Whats the best (easiest/cheapest) way to get from Washington Dulles airport to Baltimore? 2. Is there an airline that flies direct from Baltimore to Portland MA (I will be visiting firnds after the Symposium) 3. How far/whats the best way to get from the hotel to the Crypto museum? My email to the hotel bounced, and their web page about local transportation isnt very helpful - not that I'm complaining - oh, maybe I can, the hotel isnt a volunteer, I guess ;-) 73s Jim G3WGM -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org]on Behalf Of Steve Meuse Sent: 03 September 2009 03:05 To: Roger Kolakowski Cc: amsat-bb@amsat.org Subject: [amsat-bb] Re: AMSAT Symposium Breaking News: Low Cost Airfares Roger Kolakowski expunged (rogerk...@aol.com): From this morning's email: On Sale Today Only... $19 one way from Boston to Baltimore on JetBlue... I just looked, seems like you needed to travel on Wednesday to make that work. PVD to BWI was the cheapest I could find in the regional airports here in MA. I'm flying in Friday morning, hoping to spend the day at the Electronics and Crypto museums. This will be my first Symposium, I typically have another meeting that week, but it didn't conflict this year. -Steve N1JFU - http://n1jfu.blogspot.com - sme...@twitter ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.75/2341 - Release Date: 09/02/09 05:50:00 ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] AMSAT-UK Colloquium - 2010 31 July - 1 Aug 2010
Hi Folks, This is just to let you know well in advance the dates of the 2010 AMSAT-UK Colloquium. It will be held over the weekend 30 Jul - 1 Aug 2010. The location will be the same as in 2009, ie the Holiday Inn, Guildford, Surrey, United Kingdom. (quite close to the University of Surrey) In 2009 there were a significant number of delegates arriving early on Friday, so we are planning to have some form of activity then (even if just social!), also probably in the early evening a 'beginners session'. Details to follow. Meanwhile, please put the dates in your diaries! 73 Jim G3WGM Hon Sec AMSAT-UK ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Use of ICOM 910 for AO-51 L-Band BBS Uplink?
Hi Folks, I would be interested to know if anyone is using an ICOM 910 with the L-Band module for Ao-51 uplink on the BBS? (The optional L-Band unit for the 910 runs 10 watts according to the book). I am particularly interested to know what type/gain of antenna I would need to get a reliable up link. I am planning to use about 20 metres of Ecoflex 10, which will introduce a loss of something like 3 Dbs. I know that the LBand/Digital up link is currently off, just gettting ready for the next 'on' period! 73s Jim G3WGM ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Lets Fix ISS, Replace ARISS
Miles, It is a shame that the public aren't allowed at the meetings (I've attended before, and they are most interesting). I'm not sure of the reason, but I think that your conclusion that the 'AMSAT Corporation' by which I assume you mean AMSAT-NA wishes to monopolise ARISS may not be true. It was the original ISS partner countries in USA, Russia, Japan, Europe and Canada who set up ARISS. I cant remember how many votes each of these ARISS partners are entitled to, but certainly the USA doesnt get a majority vote. (But I acknowledge does a great deal, along with Russia, of the work). At the ARISS-i meetings I've attended, I recall that the delegates from the ISS partner Nations (USA, Russia, Japan, Europe and Canada) were the ones votong on the proposals In Europe the member societies of ARRIS-EU are AMSAT-Belgium AMSAT-CT Portugal AMSAT-France AMSAT-Italy AMSAT-SM Sweden AMSAT-UK ARI Italy DARC Germany MARL Malta PZK Poland RAL Lebanon REF-Union France REP Portugal RSGB UK UBA Belgium USKA Switzerland You can see that there are as many National Amateur Radio Societies, as there are AMSAT's. As Gaston has said, member Societies within the US are AMSAT and ARRL; I can't understand how you can assume that AMSAT is attempting to monopolise ARRIS. 73 Jim G3WGM Hon Sec AMSAT-UK and ARISS Supporter. -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org]on Behalf Of Rocky Jones Sent: 15 August 2009 18:38 To: ka1...@yahoo.com; Amsat BB Subject: [amsat-bb] Re: Lets Fix ISS, Replace ARISS Miles. well done. I suspect that you have hit a brick wall...but I concur in everything you wrote. Having said that. ISS and human spaceflight in general (at least in the US) is on the verge of a very big shake up...and that might shake the ham equation as well. Robert Oler WB5MZO Date: Sat, 15 Aug 2009 10:20:38 -0700 From: ka1...@yahoo.com To: amsat-bb@amsat.org Subject: [amsat-bb] Lets Fix ISS, Replace ARISS Marex Miles Mann WF1F Marex w...@marexmg.org August 25, 2009 Dear ARISS supporters: I am writing to you because of the extremely poor track record that ARISS has accumulated over the past 12 years regarding ISS hardware projects. The only way to correct the problem and fix the Amateur Radio educational program is to completely reorganization the current ARISS hardware structure. Under the new ARISS Closed Door policy, only selected members from AMSAT-NA are allowed to participate. This new policy has turned the once open ARISS into a closed door Monopoly controlled by the AMSAT Corporation. Based on the current actions of ARISS and their very poor performance with in-flight hardware I would like to propose a complete reorganization of the ARISS hardware process. Please review the enclosed information. I look forward to discussing the proposal with you are your earliest opportunity. Sincerely G. Miles Mann Memo from ARISS April 2009 From Gaston Bertels ARISS Chairman Hi Miles, By decision of the ARISS Board, participation to ARISS-i meetings is limited to delegates from the Member Societies and observers nominated by these societies. USA member societies are the ARRL and AMSAT NA. Only these societies can nominate participants to the ARISS-i meetings. Best regards 73 Gaston Bertels, ON4WF ARISS Chairman ARISS Reorganization Proposal By Miles Mann June 17, 2009 Rev 1.01 What is ARISS? The goal of ARISS was to create an organization to select, control and coordinate Amateur Radio projects designed for the International Space Station (ISS). The ARISS program would then assist the 16 countries (Russia, Canada, Japan, Brazil, USA, member nations of ESA, Belgium, Denmark, France, Germany, Italy, The Netherlands, Norway, Spain, Sweden, Switzerland, and the United Kingdom), which are supporting the ISS to help choose the best educational Amateur Radio projects for ISS. Each county would have delegate-voting privileges on ARISS and project selection activities. Summary: When Dave Larsen and Miles Mann (MAREX) helped form ARISS in August 1996, one of our goals was to keep Space open for the public and not turn the ISS, into a monopoly controlled by the AMSAT Corporation. We were partially successful. Unfortunately most of the ARISS voting delegation came from AMSAT Corporation representatives from different counties and a few other radio clubs. The newly formed ARISS agreed to allow competing clubs to submit proposals. The MAREX team helped create ARISS, however since the majority of people present were from the AMSAT Corporation, MAREX was not allowed to have any voting privileges. Prior to 2009, ARISS would say that its meetings were open to the public and other clubs were welcome to observer. In 2009 ARISS changed its open
[amsat-bb] Re: SAT PC H e e e lp!
Hi Jean-François Thanks for your suggestions. Still not working. I have even moved the doppler.sql file from the DATA_Repair directory. Also I have removed all the entries except one, just in case there is an error in one of the lines I am not using. My Doppler.SQF file is shown below. I'm at my wits end. Maybe I should reinstall the program, but there's no ununstall function, so I'm not sure if that would be a good idea? What do you think? 73 Jim Here'e my Doppler.SQF file ; For Hints look at the end of this file. ; Do not remove or modify these first ; 3 lines of the file, starting with ';'! FO-29,435850.45,145951.55,USB,LSB,REV,0,0 ; ; Hints ; This file contains all data required for the CAT tuning to operate. CAT tuning ; only works for satellites whose frequencies are contained in the file. ; To use the program's tuning functions during Vfo operation, these data are also ; needed. ; It is essential not to modify the file format, when you edit the file. ; Be careful not to add blanks or blank lines. For decimal markers, the point ; has to be used. ; To add another satellite, copy one of the lines, insert the copy into the ; data section, then modify it for the new satellite. ; ; Each line has to contain the following parameters: ; The name of the satellite, the spelling has to be the same as in the Keplerian ; source file. ; the receive- and transmit frequencies in kHz, ; the Up- and Downlink modes, possible entries: FM,FMN,CW,CWN,USB,LSB, ; the frequency trend of the satellite (normal or reverse), possible entries: NOR, REV ; the converter and transverer offset frequencies in kHz ; ; As a general rule, all 7 parameters have to be present, even if some of them ; are irrelevant for a particular satellite. In that case the unused data may ; have any value. ; ; Each line may contain a short comment at it's end, see the examples in ; the data lines for AO-51. The comment must be separated by a comma from ; the last parameter entry. ; ; If the receiving frequency is the only one needed (UO-11), the transmitting ; frequency has to be set to 0. ; Converter and transverter offsets also have to be 0, if no converter or ; transverter is needed for the satellite concerned. ; For satellites using multiple frequencies or frequency pairs, the name has to ; be repeated each time. At program start, the first file encountered for a specific ; satellite will be used. By editing the file, you should therefore pay attention ; to put the most used frequency as a first entry in the list. ; ; For more detailed informations read the manual, section 'Auxiliary files', ; 'Doppler.SQF'. For more detailed informations about converter/transverter ; operation read the FAQ.htm, section 'Converter/Transverter Operation'. -Original Message- From: Jean-François Ménard [mailto:jf.va...@gmail.com] Sent: 03 August 2009 20:08 To: Jim Heck; amsat-bb@amsat.org Subject: Re: [amsat-bb] SAT PC H e e e lp! Ho yes probably easier to solve that way. I got this problem yesterday when editing my doppler file. The problem is your doppler file Check if you did not change the ACSII format of the file. Be sure to use colon , and not coma . to seperate each parameter. an example of a line in my doppler file: AO-51,435300,145920,FM,FM,NOR,0,0,VOICE No coma at all when editing, always colon to separate parameter. Be sure to save in ASCII format. Other mode sometime add unusual control that are not needed and cause the problem. Try this and keep us informed !! 73 Le 3 août 2009 11:54, Jim Heckj...@milnet.uk.net a écrit : Hi Jean-Francois, No, I see nothing in the freq display - its just blank! 73 Jim -Original Message- From: Jean-François Ménard [mailto:jf.va...@gmail.com] Sent: 03 August 2009 13:46 To: Jim Heck Cc: amsat-bb@amsat.org Subject: Re: [amsat-bb] SAT PC H e e e lp! Hi, Do you see the uplink and downlink frequencies displayed properly in the upper center of SatPC32 screen when you choose a satellite or you do not see nothing ??? 2009/8/3 Jim Heck j...@milnet.uk.net: Hi Folks, Wonder if anyone can help me? I am running SATPC ver 12.8 under Win XP. In the past I have had great success with controlling my radio (an ICOM 910H) but recently the control has stopped for no apparant reason. When I press the C+ button the radio goines into Sat mode OK, but the freq/modes dont change. I have stared and stared at the Doppler.SQF file, and cant see any error. I have double and triple checked things like CAT control baud rates etc etc. Can anyone suggest what else I should be checking? Its very stange as the radio goes into sat mode, but just doesnt seem to set to the correct freqs/modes. 73 Jim ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite
[amsat-bb] Re: SAT PC H e e e lp!
Hi Folks, I just want to say thanks to all the folks who helped me with this. I'm now back up and running with the CAT interface from SATPC32 to my ICOM 910H. In case anyone is wondering; I am pretty certain that what happened is that Celestrak altered the format of their kep files (maybe a couple of months ago, or more), and in particular, changed the format of the sats name. I found I had to change FO-29 to JAS-2 (FO-29) in the Doppler.sql file. The moral of this story is if your CAT interface stops working, check that you doppler.sql file has excatly the same sat name as in the keps file. (I think what confused me, and thats getting easier and easier as the years go by, is that FO-29 appeared in the keps file in brackets.) !! Thanks again to all who came to my aid! 73 Jim G3WGM -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org]on Behalf Of Jim Heck Sent: 04 August 2009 07:12 To: Jean-François Ménard; amsat-bb@amsat.org Subject: [amsat-bb] Re: SAT PC H e e e lp! Hi Jean-François Thanks for your suggestions. Still not working. I have even moved the doppler.sql file from the DATA_Repair directory. Also I have removed all the entries except one, just in case there is an error in one of the lines I am not using. My Doppler.SQF file is shown below. I'm at my wits end. Maybe I should reinstall the program, but there's no ununstall function, so I'm not sure if that would be a good idea? What do you think? 73 Jim Here'e my Doppler.SQF file ; For Hints look at the end of this file. ; Do not remove or modify these first ; 3 lines of the file, starting with ';'! FO-29,435850.45,145951.55,USB,LSB,REV,0,0 ; ; Hints ; This file contains all data required for the CAT tuning to operate. CAT tuning ; only works for satellites whose frequencies are contained in the file. ; To use the program's tuning functions during Vfo operation, these data are also ; needed. ; It is essential not to modify the file format, when you edit the file. ; Be careful not to add blanks or blank lines. For decimal markers, the point ; has to be used. ; To add another satellite, copy one of the lines, insert the copy into the ; data section, then modify it for the new satellite. ; ; Each line has to contain the following parameters: ; The name of the satellite, the spelling has to be the same as in the Keplerian ; source file. ; the receive- and transmit frequencies in kHz, ; the Up- and Downlink modes, possible entries: FM,FMN,CW,CWN,USB,LSB, ; the frequency trend of the satellite (normal or reverse), possible entries: NOR, REV ; the converter and transverer offset frequencies in kHz ; ; As a general rule, all 7 parameters have to be present, even if some of them ; are irrelevant for a particular satellite. In that case the unused data may ; have any value. ; ; Each line may contain a short comment at it's end, see the examples in ; the data lines for AO-51. The comment must be separated by a comma from ; the last parameter entry. ; ; If the receiving frequency is the only one needed (UO-11), the transmitting ; frequency has to be set to 0. ; Converter and transverter offsets also have to be 0, if no converter or ; transverter is needed for the satellite concerned. ; For satellites using multiple frequencies or frequency pairs, the name has to ; be repeated each time. At program start, the first file encountered for a specific ; satellite will be used. By editing the file, you should therefore pay attention ; to put the most used frequency as a first entry in the list. ; ; For more detailed informations read the manual, section 'Auxiliary files', ; 'Doppler.SQF'. For more detailed informations about converter/transverter ; operation read the FAQ.htm, section 'Converter/Transverter Operation'. -Original Message- From: Jean-François Ménard [mailto:jf.va...@gmail.com] Sent: 03 August 2009 20:08 To: Jim Heck; amsat-bb@amsat.org Subject: Re: [amsat-bb] SAT PC H e e e lp! Ho yes probably easier to solve that way. I got this problem yesterday when editing my doppler file. The problem is your doppler file Check if you did not change the ACSII format of the file. Be sure to use colon , and not coma . to seperate each parameter. an example of a line in my doppler file: AO-51,435300,145920,FM,FM,NOR,0,0,VOICE No coma at all when editing, always colon to separate parameter. Be sure to save in ASCII format. Other mode sometime add unusual control that are not needed and cause the problem. Try this and keep us informed !! 73 Le 3 août 2009 11:54, Jim Heckj...@milnet.uk.net a écrit : Hi Jean-Francois, No, I see nothing in the freq display - its just blank! 73 Jim -Original Message- From: Jean-François Ménard [mailto:jf.va...@gmail.com] Sent: 03 August 2009 13:46 To: Jim Heck Cc: amsat-bb@amsat.org
[amsat-bb] SAT PC H e e e lp!
Hi Folks, Wonder if anyone can help me? I am running SATPC ver 12.8 under Win XP. In the past I have had great success with controlling my radio (an ICOM 910H) but recently the control has stopped for no apparant reason. When I press the C+ button the radio goines into Sat mode OK, but the freq/modes dont change. I have stared and stared at the Doppler.SQF file, and cant see any error. I have double and triple checked things like CAT control baud rates etc etc. Can anyone suggest what else I should be checking? Its very stange as the radio goes into sat mode, but just doesnt seem to set to the correct freqs/modes. 73 Jim ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] FX.25 on Castor and Pollux
Hi Folks, Does anyone know if these sats are sending FX.25 yet? I havnt found much on the web about FX.25, but it sounds exptremely cool. The https://goby.nrl.navy.mil/ANDE/Amateur_Radio.html web site refers to a FX.25 decoder. Is this yet available, I wonder? 73s Jim G3WGM ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Hi to the 13 Original 13 Colonies - Motherland Calling !!
HI Folks, About 36 hours ago, I had an excellent QSO with Tim, N3TL via FO-29 on SSB. We had about a two minute window, so we did't have much time for rag chewing!!! According to my investigations, there are only a few orbits of FO-29 (my favorite satellite at present, and I think the only one high enough to reach many of the Eastern States). One of them occurs in about 12 hours, at 0044 (UTC) 5 July. Bearing in mind Tim is in quite far south, it should be possible for addition States to be worked from here. Please note that I can only do SSB (CW is far to rusty, I'm sorry to say) If anyone in the 13 States would like to make a sked for this orbit of FO-29, please email me off list at g3...@amsat.org 73s, and Happy Holidays! Jim G3WGM ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] AMSAT-UK COLLOQUIUM 25/26 July
Hi Folks, Just a reminder about the AMSAT-UK Colloquium on Sat/Sun 25/26 July. The hotel will stop holding our rooms after tomorrow (Fri 3 July), so it would be best to book over the next 48 hrs to be sure of a room being available. The easiest way to do this is to phone the hotel on +44 (0) 1483 78 and quote reference R0F (That's R zero F). I understand that the hotel will still have rooms available after tomorrow, but if you book after then, availability is not guaranteed! 73 Jim G3WGM Hon Sec AMSAT-UK www.uk.amsat.org ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] AMSAT-UK Colloquium Bookings - Two weeksd to go!
Hi Folks, If you are considering attending the AMSAT-UK Colloquium at the Holiday Inn, Guildford, UK on 25/26 July, you should be booking soon. The hotel will only hold rooms for us until Fri 3 July, after that date, you may find that there are no more rooms available. Also please note that so far more than 50% of people attending have booked in for the Friday Night before the Colloquium, and the hotel tells me that they are now getting quite full on this night. So PLEASE BOOK EARLY to avoid dissappointment. Full booking details, includiong prices are at http://www.uk.amsat.org/content/view/25/49/ The phone number of the hotel is +44 (0) 1483 78 and their email address is meetings-guildf...@ihg.com. Please quote reference R0F (Thats R zero F) when booking. 73s Jim Heck, G3WGM Hone Sec AMSAT-UK ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: true duplex radios
Hi All,
In my experience, you dont have to listen to the output channal of a repeater,
while transmitting to its input, ie you dont have to hear your own signals
coming
back through the repeater. BUT you do (ideally) when working through a
satellite.
Again im my experience, such a radio as Greg has described is called a half
duplex one.
The big advantage of using a full duplex radio for satellites is that you can
check if you are being rebroadcast by the satellite or not, without relying on
others to tell you. (You can also change the polority of the up link signal, for
maximium smoke!)
73 Jim G3WGM
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org]on
Behalf Of Greg D.
Sent: 02 June 2009 07:12
To: clintbra...@earthlink.net; amsat-bb@amsat.org
Subject: [amsat-bb] Re: true duplex radios
{queue thunder clap}
Wait a minute... How can a radio be capable of cross-band repeat and not
be full duplex? I believe the answer is no. Cross-band (analog)
repeating is inherently full duplex. So, perhaps this is a simple way to
ask a non-satellite person, without having to explain what duplex means.
By the way, my Alinco DR-610 mobile rig is also full-duplex. You may add
it to the list. (In fact, it's got some down-right-weird modes, between
the two sides of the radio, that it's sometimes anyone's guess what will
happen when you key up.)
Greg KO6TH
From: clintbra...@earthlink.net
To: amsat-bb@amsat.org
Date: Mon, 1 Jun 2009 12:37:16 -0700
Subject: [amsat-bb] Re: true duplex radios
... Yaesu FT-8800 ...
Really? Dual-receive, indeed. And will perform crossband repeating.
But I can transmit on one band and simultaneously hear myself on
another with a FT-8800?
___
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_
Lauren found her dream laptop. Find the PC that’s right for you.
http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290
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No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.339 / Virus Database: 270.12.48/2147 - Release Date:
05/31/09 20:45:00
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[amsat-bb] New European Astronauts announced - One is British!
Hi Folks, See the deails at http://news.bbc.co.uk/1/hi/sci/tech/8058601.stm 73 Jim G3WGM ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] AMSAT 2009 COLLOQUIUM- URGENT UPDATE
AMSAT 2009 COLLOQUIUM- URGENT UPDATE Earlier this year AMSAT-UK announced its intention to hold its Annual Colloquium in 2009 at the University of Manchester over the weekend of July 24-26th. Unfortunately it has not proved possible to produce a programme including the food and accommodation at rates that would match or be more economic than those of previous years. Therefore, to ensure the best possible event for the largest number of visitors the venue has been changed to the Holiday Inn Hotel at Guildford - this is very close to the Surrey University where the event has been held previously. The 2009 AMSAT Colloquium will now commence at 10am on Saturday July 25th and close at approximately 4pm on the Sunday. Accommodation will be available, at special rates, on the Saturday evening and also on the Friday and Sunday. The new venue will enable visitors to attend at a significantly lower cost than last year and experience greatly improved accommodation. The two days will be filled with presentations covering all the latest amateur satellite happenings and developments. The new GB4FUN trailer will also be in attendance and available to demonstrate satellite operations. An informal social gathering is planned for those who are able to arrive on the Friday evening. Full details of the booking arrangements will be made available shortly on the AMSAT-UK web site, www.uk.amsat.org. 73s Jim G3WGM Hon Sec AMSAT UK Note for editors, etc - Please circulate. ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Question
And dont forget the antennas on the sattelite. They cant necessarily be optimal. A directional antenna needs a platform, the orientation of which is known and controlled. To do this is space is not trivial; vbarious mechanism exist, gravity gradient boom, megnetostorquing, spinning wheels. Its also expensive and adds complication to the satellitte. Some amateur sats have been stablised, and have used directional antennas successfully, eg AO-40, AO-13, but not only were these costly to build and launch, they also required considerable ground control efforet (globally) to ensure their solar cells we never parrallel to the suns rays. (If that happens, no power=death of the sat). 73 Jim G3WGM -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org]on Behalf Of James Duffey Sent: 06 May 2009 03:17 To: d...@mynatt.biz Cc: Amsat BB Subject: [amsat-bb] Re: Question Well more power means more solar cells and bigger batteries. The number of solar cells that one can fit on the outside of a satellite depends on the size of the satellite. More solar cells means a bigger spacecraft or deployable cells. There is a limit to the size of deployable panels and added complexity risks the mission if they should fail. Bigger spacecraft cost more to build and launch. The size of the solar panels determines the battery size. Ideally you want a battery that can be fully charged by the solar cells while in sunlight and maintain its charge to a useful level in eclipse. Bigger batteries weigh more and weight pretty much determines how much a satellite costs, particularly the launch costs. So it pretty much boils down to optimizing the solar panel/battery combination with the size of the spacecraft and the mass lift capability available to us on a launcher. I am not sure what you mean by extraordinary measures to receive, or what satellite you are trying to receive, but the requirements to receive many satellites is modest. Low loss feedline, helps, as do directional antennas and preamps, but these are all available with modest effort, either through building them yourself or purchasing them. - Duffey Okay, time for my stupid question of the week. Why are our sats so low powered? Why don't we have better batteries, solar power systems, or generators? Seems our sats are so low powered they require extraordinary measures to receive. Is this an accurate perception? Dave ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb -- KK6MC James Duffey Cedar Crest NM ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.325 / Virus Database: 270.12.19/2099 - Release Date: 05/05/09 13:07:00 ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
