[amsat-bb] Re: Been A While
Hi Joel, It is great to hear you on the BB. I hope to work you on the birds when I get my antennas back in the air. We moved south of the Tennessee River near I-65. Our daughter is now 3 years old (my classmates have grandchildren) and giving me a little more time to play radio. We managed to earn Field Day bonus points using an Arrow antenna the last 2 years. Alan, WB5RMG, brought his equipment out to the Field Day site this year and it worked great, but boy was it HOT outside under a canopy tent. As soon as the honey-do list is completed at the new house, my antennas will be back in the air, but it is 'Arm Strong' pointing at the moment. 73's, Tim - N8DEU - Original Message - From: jbblac...@gmail.com To: amsat-bb@amsat.org Sent: Friday, July 03, 2009 5:48 PM Subject: [amsat-bb] Been A While It's been quite a while since I have been on this BB. I got out of the hobby for about four years but I am working my way back in. I used to be KS4AW then K2SAT. Now I'm W4JBB. I don't even know if some of the folks who were involved in AMSAT are even still around. I do searches on their webpages and either get nothing or no updates in years - I don't dive past the first search results page. These are a few I remember: K5OE K6YK KF4FDJ N7SFI N8DEU WB6LLO There were many others too. I am getting my equipment slowly out of storage (I have it stored all over the house apparently). I had a FODtrack interface and found a partial build of the G6LVB tracker. I cannot remember if I finished the LVB tracker or not. I have a cutout for and LCD display, but no display in it. My dad has my '847, but he's not using it and I'll get it back in the next week. I left my tower up with my 2m/70cm antennas and the G5400 rotor. Feedline is still there too... partially. I guess my only question about gear is what should I use for auto-tracking with a Vista box? Like I said, I *had* a FODtrack interface, but I cannot find it. I also have a partially built LVB tracker. I have a parallel PCI card I can install in the Vista machine but I wonder if anyone has had any luck with that setup... I'm not opposed to booting up into Linux either. I have looked at the AMSAT homepage and there is only a small fraction of satellites still available. I have renewed my membership and am really looking forward to getting back on the birds. I think I have rambled enough. 73, Joel, W4JBB ___ 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 ___ 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] Subject: Re: Antenna Question
Hello all, Now that I was remionded to look, my qhtenna units came with a 1 page assemby instructions and drawing that includes lengths of rods and phasing harness. I'd be glad to scan/post it somewhere if anyone wants it. Mike WB1AAT -- Message: 4 Date: Sat, 04 Jul 2009 20:45:22 + From: Nigel Gunn G8IFF/W8IFF ni...@ngunn.net Subject: [amsat-bb] Re: Antenna Question To: George Henry ka3...@att.net Cc: amsat bb amsat-bb@amsat.org, Jim Jerzycke kq...@pacbell.net Message-ID: 4a4fbf62.3090...@ngunn.net Content-Type: text/plain; charset=UTF-8; format=flowed I would suggest that you don't need a phasing line if the dipoles are spaces a quarter wave and that both are fed by equal length cables. George Henry wrote: Looking at the pictures, it appears that the dipoles are separated by about 1/4 wave in free space, which is physically longer than a 1/4 wave phasing line would be. And I'd think that the phasing line would have to be 1/2 wavelength, after introducing a 1/4 wave offset between the dipoles, correct? ___ 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] An alternative ... or ... competition !!!.
Ladies and Gentlemen, For those that don't know it, The chief of RosKosmos, the Russian Space Agency *confirmed* last week the Russian intention to pull the plug on the ISS in the 2015 - 2020 timeframe and to construct another dedicated Russian space station. According to Anatoly Zak RosKosmos informed NASA of these plans 14 days ago. The new Russian station is *NOT* intended to be a laboratory like the ISS but more of an in-orbit contruction platform for future Mars-like and outer space missions. The station will comprise a maintainable 'ball' section with several docking ports with attachable modules. I propose that amateur radio satellite operators get together and form a group to suggest/try to influence/impliment an ARISS type of project for this space station. A Strela type frame could be attached to the underside of the 'ball' and since the station is planned for a Molinya type orbit the coverage would be suitable for DX. The planned orbit would put the station predominently over Russia - as opposed to the current ISS equatorial orbit. Personally, I would suggest an RS-10/11 RS-12/13 clone with a ROBOT ... (read: propagation tester) - as these satellites were without the shadow of a doubt the best for recruiting newcomers. It would, in my opinion, be a viable concept and an alternative to some of the latest 'ideas' of a transponder on the moon ... which wouldn't 'catch' many potential newcomers but would (*IN MY OPINION*) only serve a few dedicated 'experts' ... leading to the demise of amateur satellite communications in general. Comments, monies and praise to LA2QAA. Criticisms, horsewhipping and flaming to GM1SXX. 73 John. la2...@amsat.org Interested parties may read the following ... The OPSEK project By 2008, the Russian successor to the International Space Station, ISS, was identified as Orbitalniy Pilotiruemyi Eksperimentalniy Kompleks, OPSEK, or Orbital Manned Assembly and Experiment Complex in English.* Unlike previous designs of Mir, Mir-2 and the ISS, the heart of the station would be a four-ton ball-shaped node module. Equipped with six docking ports, this relatively small and simple element would be the only permanent element of the station. All other modules would come and go as their lifespan and mission requires. The initial architecture of the OPSEK complex could be built out of modules originally planned for the Russian segment of the ISS. The exact scenario of the OPSEK assembly would depend on the end of the ISS and the readiness of the latest Russian modules. According to a 2008 scenario, the MLM multipurpose module, the node module and a pair of NEM power platforms could be first launched to the ISS in 2011, 2013 and 2014-2015, respectively. With the deorbiting of the ISS looming around 2020, these modules could separate from the old outpost to form the core of the new Russian station. Another, more controversial scenario considered the separation of the practically entire Russian segment, including the MIM-2 docking compartment and the Zvezda service module, prior to the ISS deorbiting. In this case, the 20-year-old service module would temporarily take a responsibility for the flight control of the OPSEK, until its replacement with a 40-ton versatile core module, UMB, launched by a next-generation rocket from yet-to-be built launch site in Vostochny during 2020s. The separation of the Russian segment from the ISS would leave the rest of the outpost without effective orbital maneuvering capabilities, leaving the European ATV spacecraft as a likely candidate to perform the tasks of attitude control and deorbiting. To achieve this the ATV would have to be modified to enable its docking with the US segment of the ISS. Depending on the operational orbit selected for the OPSEK, it might be necessary to change the orbital inclination of the modules departing the ISS and forming the new station. The lowest inclination accessible from Vostochny is 51.7 degrees, while the ISS is orbiting the Earth with the inclination 51.6 degrees toward the Equator. It is estimated that one or two Progress cargo ships would be necessary to push the modules from one inclination to another. From official statements during 2008 and 2009, it is clear that the one of the chief objectives of the OPSEK complex would be the support for expedition to Mars. All major elements of the Martian expeditionary complex, such as main habitation module, Mars lander and nuclear-powered space tug would dock to the station before its departure from the low-Earth orbit toward Mars. The Martian expedition would at the OPSEK as well. The station would also play a similar role in lunar exploration. Reusable space tugs could link OPSEK with the Lunar Orbital Station, LOS, in orbit around the Moon, thus
[amsat-bb] Molinya
David, My use of the word Molniya was ambiguous. I should !!! have emphisised *LEO* elliptical. Let me explain ... The word Molinya in Russian means (literally) 'lightning' but in a space context it is accepted to mean ELLIPTICAL ... as per their TV satellite orbits which are in English dialogue would be classified as *HIGHLY* elliptical. The planned space station is envisaged in a 70 degree LEO orbit. I apologise for my misleading remarks. 73 John. la2...@amsat.org From: g0...@aol.com Date: Sun, 5 Jul 2009 11:32:56 -0400 Subject: Re: [amsat-bb] An alternative ... or ... competition !!!. To: la2...@amsat.org In a message dated 05/07/2009 15:17:02 GMT Standard Time, archie.hack...@hotmail.com writes: The new Russian station is *NOT* intended to be a laboratory like the ISS but more of an in-orbit contruction platform for future Mars-like and outer space missions. The station will comprise a maintainable 'ball' section with several docking ports with attachable modules. I propose that amateur radio satellite operators get together and form a group to suggest/try to influence/impliment an ARISS type of project for this space station. A Strela type frame could be attached to the underside of the 'ball' and since the station is planned for a Molinya type orbit the coverage would be suitable for DX. Hi John. Just wondering Is a Molinya orbit highly elliptical ?? If so, then it cant really go above 1000km high or the crew will get zapped by the protons in the lower van Allen belt. Thanks David ___ 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: Antenna Question
True, but since the QST article mentioned a phasing line, I was trying to figure out his design. George, KA3HSW - Original Message - From: Nigel Gunn G8IFF/W8IFF ni...@ngunn.net Subject: [amsat-bb] Re: Antenna Question To: George Henry ka3...@att.net Cc: amsat bb amsat-bb@amsat.org, Jim Jerzycke kq...@pacbell.net I would suggest that you don't need a phasing line if the dipoles are spaces a quarter wave and that both are fed by equal length cables. George Henry wrote: Looking at the pictures, it appears that the dipoles are separated by about 1/4 wave in free space, which is physically longer than a 1/4 wave phasing line would be. And I'd think that the phasing line would have to be 1/2 wavelength, after introducing a 1/4 wave offset between the dipoles, correct? ___ 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: dream your own sat
The problem is that amateur radio doesn't significantly reduce the cost of a satellite. Any interest by the Red Cross would not be in the satellite but in human volunteers that might come with it. Unfortunately, the LEO satellites that hams can afford generate little interest in this forum. 73, John KD6OZH - Original Message - From: Art McBride kc6...@cox.net To: 'rupert red' rupert@live.it; amsat-bb@amsat.org Sent: Sunday, July 05, 2009 19:00 UTC Subject: [amsat-bb] Re: dream your own sat Rupert, I think that is a fair assumption on your part, but only because the are no new ideas being presented that have commercial potential that can use Amateur Radio as an inexpensive to proof of concept. In the present Amateur Radio community only Emergency Communications is getting the publicity. Perhaps FEMA or the Red Cross might help pay for an emergency communication satellite otherwise it is LEO's forever! Art, KC6UQH -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of rupert red Sent: Sunday, July 05, 2009 4:47 AM To: amsat-bb@amsat.org Subject: [amsat-bb] dream your own sat Hallo all... from a while I'm hearing about MANY different and interesting satellite solutions... LEO, MEO, HEO, GEO... MOON !!! The problem is only ONE ! Amateur radio community has no money for this project, and will never have! Amsat Co will never be able to collect millions I red on this bb that hams has no money for an expensive ground station... then how can they send many money to Amsat? Public and private organizations all over the world have not an high consideration of hams, and will never invest founds for them. The conclusion is only ONE... we will never see a new oscar satellite in the sky (at least some student's cube). Let's all dream together guys. Best 73 Rupert _ Condividi e organizza le tue immagini con Windows Live Foto. http://www.microsoft.com/windows/windowslive/photos.aspx ___ 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 __ Information from ESET NOD32 Antivirus, version of virus signature database 4217 (20090704) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4218 (20090705) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ 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 ___ 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: dream your own sat
The recently launched TerreStar-1 is designed to provides emergency comms capability http://www.southgatearc.org/news/july2009/terrestar_1_launched.htm The basic problem is that Amateurs want linear transponder satellites in orbits above 1400 km in order to provide reasonable DX opportunities and pass times greater than 20 minutes. But cheap launches only seem to be available for 500-800 km orbits, so we need to find a way to increase the orbit of say a triple-cubesat from 700 km to 1400 km using a non-combustive technology so as not to upset the cheap launch provider. Providing the radio communications is by comparison a trival exercise it's finding a means (solar powered thrusters ?) to increase orbital height that's the tricky part. 73 Trevor M5AKA --- On Sun, 5/7/09, John B. Stephensen kd6...@comcast.net wrote: From: John B. Stephensen kd6...@comcast.net Subject: [amsat-bb] Re: dream your own sat To: kc6...@cox.net, 'rupert red' rupert@live.it, amsat-bb@amsat.org Date: Sunday, 5 July, 2009, 9:54 PM The problem is that amateur radio doesn't significantly reduce the cost of a satellite. Any interest by the Red Cross would not be in the satellite but in human volunteers that might come with it. Unfortunately, the LEO satellites that hams can afford generate little interest in this forum. 73, John KD6OZH - Original Message - From: Art McBride kc6...@cox.net To: 'rupert red' rupert@live.it; amsat-bb@amsat.org Sent: Sunday, July 05, 2009 19:00 UTC Subject: [amsat-bb] Re: dream your own sat Rupert, I think that is a fair assumption on your part, but only because the are no new ideas being presented that have commercial potential that can use Amateur Radio as an inexpensive to proof of concept. In the present Amateur Radio community only Emergency Communications is getting the publicity. Perhaps FEMA or the Red Cross might help pay for an emergency communication satellite otherwise it is LEO's forever! Art, KC6UQH -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of rupert red Sent: Sunday, July 05, 2009 4:47 AM To: amsat-bb@amsat.org Subject: [amsat-bb] dream your own sat Hallo all... from a while I'm hearing about MANY different and interesting satellite solutions... LEO, MEO, HEO, GEO... MOON !!! The problem is only ONE ! Amateur radio community has no money for this project, and will never have! Amsat Co will never be able to collect millions I red on this bb that hams has no money for an expensive ground station... then how can they send many money to Amsat? Public and private organizations all over the world have not an high consideration of hams, and will never invest founds for them. The conclusion is only ONE... we will never see a new oscar satellite in the sky (at least some student's cube). Let's all dream together guys. Best 73 Rupert _ Condividi e organizza le tue immagini con Windows Live Foto. http://www.microsoft.com/windows/windowslive/photos.aspx ___ 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 __ Information from ESET NOD32 Antivirus, version of virus signature database 4217 (20090704) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4218 (20090705) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ 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 ___ 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 ___ 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: dream your own sat
Any interest by the Red Cross would not be in the satellite but in human volunteers that might come with it. Unfortunately, the LEO satellites that hams can afford generate little interest in this forum. I wish we could some how better influence the dozens of cubesat satellites being built with AX.25 packet comm systems to at least consider a backup digipeater comm system. If just six of these allowed for a possibility of user digipeating, we would have a constellation that would provide worldwide text messaging capability from mobiles and handhelds with delays no more than 30 minutes. What a fantastic emergency comm system we could have. If ten of them were available, then the coverage would be nearly continuous. Amateur Radio needs to recognize its trememdous legacy of over a century of wireless text messaging and our ability to bring that connectivity to the field any time anywhere. We simply need to link them together to meet our overall Universal Amateur Radio Text Messaging Initiative, that is, any ham, any where, any time, able to text message any other ham anywhere using any hardware device, commercial or amateur by callsign alone. Please see www.aprs.org/aprs-messaging.html I count over 2 dozen existing amateur radio text messaging systems few of which are currently crossconnected. Most talk only within their own constituents. APRS and some others are already cross connected at the email level which then connects to cellphones and other wireless devices. So crossconnecting at the APRS internetwork or at the email level is easy to do. We just need all authors to consider transparent cross connection as a goal as per the above web page. This has already been done for all APRS satellites and even the ARISS system when it came over the the Satellite APRS channel 145.825. When ARISS is in packet mode, it enables text messaging and Email to and from the front panel of any APRS radio in the world via our existing network of APRS ground stations. See the downlinks on www.ariss.net We have tried to get other packet satellites on that channel, SUNSAT, PCSAT1, PCSAT2, ANDE, RAFT and ISS all of which supported this universal text messaging. We need more, and longer lived satelites. And most any AX.25 cubesat could do it as a secondary mission. We need to look for opportunities there. We had GO32 also for a year or so until its recent demise, though it's frequency was different. Bob, WB4APR ___ 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: dream your own sat
program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb __ Information from ESET NOD32 Antivirus, version of virus signature database 4217 (20090704) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4218 (20090705) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ 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 ___ 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 ___ 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 ___ 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: dream your own sat
I had an idea of setting up a pager network. That could be used for national or local emegrancy. Or just about anything else for that matter - my orignal idea was for national and local emegrancy, dx reports, and weather. With the added bonus of a personal I'd for yourself. There is a man in MI doing this with his APRS group and emegancy coms now. My idea what and is slightly different from his. I could interconnect systems or not. I like the idea of being able to text any call sign by just knowing the call sign - I never done it but doesn't DStar offer a way to do this? I know the dstar system will route you to the last place it heard a call. If you wanted to direct it to do so It would or shouldn't be too hard to setup a way for someone to know the call and have it routed to a pager. Of course then you would have to say something like get on your radio or something. Since it is one way. But it could work It is still an idea but at this point it is just an idea. I moved the idea to a collabration site, not in front of my computer and for the url - I have a link to on either http://www.HamOhio.com/profiles/kd8bxp Or http://73s.org/kd8bpx (look for the blog listed is this legal or something like that) LeRoy, KD8BXP http://www.HamOhio.com Sent on the Now Network� from my Sprint® BlackBerry -Original Message- From: Bob Bruninga bruni...@usna.edu Date: Sun, 5 Jul 2009 18:01:25 To: John B. Stephensenkd6...@comcast.net; kc6...@cox.net; 'rupert red'rupert@live.it; amsat-bb@amsat.org Subject: [amsat-bb] Re: dream your own sat Any interest by the Red Cross would not be in the satellite but in human volunteers that might come with it. Unfortunately, the LEO satellites that hams can afford generate little interest in this forum. I wish we could some how better influence the dozens of cubesat satellites being built with AX.25 packet comm systems to at least consider a backup digipeater comm system. If just six of these allowed for a possibility of user digipeating, we would have a constellation that would provide worldwide text messaging capability from mobiles and handhelds with delays no more than 30 minutes. What a fantastic emergency comm system we could have. If ten of them were available, then the coverage would be nearly continuous. Amateur Radio needs to recognize its trememdous legacy of over a century of wireless text messaging and our ability to bring that connectivity to the field any time anywhere. We simply need to link them together to meet our overall Universal Amateur Radio Text Messaging Initiative, that is, any ham, any where, any time, able to text message any other ham anywhere using any hardware device, commercial or amateur by callsign alone. Please see www.aprs.org/aprs-messaging.html I count over 2 dozen existing amateur radio text messaging systems few of which are currently crossconnected. Most talk only within their own constituents. APRS and some others are already cross connected at the email level which then connects to cellphones and other wireless devices. So crossconnecting at the APRS internetwork or at the email level is easy to do. We just need all authors to consider transparent cross connection as a goal as per the above web page. This has already been done for all APRS satellites and even the ARISS system when it came over the the Satellite APRS channel 145.825. When ARISS is in packet mode, it enables text messaging and Email to and from the front panel of any APRS radio in the world via our existing network of APRS ground stations. See the downlinks on www.ariss.net We have tried to get other packet satellites on that channel, SUNSAT, PCSAT1, PCSAT2, ANDE, RAFT and ISS all of which supported this universal text messaging. We need more, and longer lived satelites. And most any AX.25 cubesat could do it as a secondary mission. We need to look for opportunities there. We had GO32 also for a year or so until its recent demise, though it's frequency was different. Bob, WB4APR ___ 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 ___ 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: dream your own sat
Ion Drive, Just kidding! Joe WB9SBD Trevor . wrote: The recently launched TerreStar-1 is designed to provides emergency comms capability http://www.southgatearc.org/news/july2009/terrestar_1_launched.htm The basic problem is that Amateurs want linear transponder satellites in orbits above 1400 km in order to provide reasonable DX opportunities and pass times greater than 20 minutes. But cheap launches only seem to be available for 500-800 km orbits, so we need to find a way to increase the orbit of say a triple-cubesat from 700 km to 1400 km using a non-combustive technology so as not to upset the cheap launch provider. Providing the radio communications is by comparison a trival exercise it's finding a means (solar powered thrusters ?) to increase orbital height that's the tricky part. 73 Trevor M5AKA --- On Sun, 5/7/09, John B. Stephensen kd6...@comcast.net wrote: From: John B. Stephensen kd6...@comcast.net Subject: [amsat-bb] Re: dream your own sat To: kc6...@cox.net, 'rupert red' rupert@live.it, amsat-bb@amsat.org Date: Sunday, 5 July, 2009, 9:54 PM The problem is that amateur radio doesn't significantly reduce the cost of a satellite. Any interest by the Red Cross would not be in the satellite but in human volunteers that might come with it. Unfortunately, the LEO satellites that hams can afford generate little interest in this forum. 73, John KD6OZH - Original Message - From: Art McBride kc6...@cox.net To: 'rupert red' rupert@live.it; amsat-bb@amsat.org Sent: Sunday, July 05, 2009 19:00 UTC Subject: [amsat-bb] Re: dream your own sat Rupert, I think that is a fair assumption on your part, but only because the are no new ideas being presented that have commercial potential that can use Amateur Radio as an inexpensive to proof of concept. In the present Amateur Radio community only Emergency Communications is getting the publicity. Perhaps FEMA or the Red Cross might help pay for an emergency communication satellite otherwise it is LEO's forever! Art, KC6UQH -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of rupert red Sent: Sunday, July 05, 2009 4:47 AM To: amsat-bb@amsat.org Subject: [amsat-bb] dream your own sat Hallo all... from a while I'm hearing about MANY different and interesting satellite solutions... LEO, MEO, HEO, GEO... MOON !!! The problem is only ONE ! Amateur radio community has no money for this project, and will never have! Amsat Co will never be able to collect millions I red on this bb that hams has no money for an expensive ground station... then how can they send many money to Amsat? Public and private organizations all over the world have not an high consideration of hams, and will never invest founds for them. The conclusion is only ONE... we will never see a new oscar satellite in the sky (at least some student's cube). Let's all dream together guys. Best 73 Rupert _ Condividi e organizza le tue immagini con Windows Live Foto. http://www.microsoft.com/windows/windowslive/photos.aspx ___ 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 __ Information from ESET NOD32 Antivirus, version of virus signature database 4217 (20090704) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4218 (20090705) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ 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 ___ 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 ___ 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: I just curious
At 05:06 AM 7/6/2009, kd8...@aol.com wrote: On the FM birds how come the split is V/U or U/V? Are there any V/V birds? snip I know there is a reason, so I am curious that is all! Yes, there is a reason. V/V would make the satellite work much like a terrestrial repeater. Terrestrial repeaters on 2m require bulky, heavy cavities, which are impractical to launch on a satellite. There's also the issue of possible detuning, due to the vibration of launch and thermal cycling while in space. One way a V/V satellite _could_ be made to work is to have separate receiver and transmitter satellites joined by a tether. A very low powered link on another band could pass the signal between the 2 sats, just as is done for some terrestrial repeaters. However, this configuration is also more expensive to launch, and any in band birds take away one of the big advantages of working crossband - being able to hear your own downlink, and monitor the channel while transmitting. 73 de VK3JED / VK3IRL http://vkradio.com ___ 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
