[amsat-bb] FUNcube Videos Released
AMSAT-UK have released a number of video showing the Assembly, Integration and Verification (AIV) testing of the FUNcube satellite at the Rutherford Appleton Laboratories: Wouter removes the stack from the Thermo Vac chamber after nearly 5 hot/cold cycles over a period of two and a half days in the chamber. The GOOD news is that the stack was still working after these tests! http://vimeo.com/26798894 Graham and Wouter return to the lab with the stack after removal from the Thermo Vac chamber. They both make comments on how the test have gone so far. http://vimeo.com/26799097 Applying 'Space Glue' to the screws holding the side panels in place, ready for Vibration Testing on July 25. http://vimeo.com/26799910 Further FUNcube videos can be seen at http://vimeo.com/user3575668 The AMSAT-UK International Space Colloquium will be held July 30-31 at the Holiday Inn, Guildford, GU2 7XZ, England. It is open to all. Either day passes or full packages comprising overnight accommodation and meals are available. For futher information see http://www.uk.amsat.org/colloquium-2011/ The Colloquium schedule, times in BST (GMT+1), is at http://tinyurl.com/2011ColloquiumSchedule The Spring issue of the AMSAT-UK newsletter OSCAR News can be downloaded free at http://www.uk.amsat.org/on_193_final.pdf Join AMSAT-UK at http://tinyurl.com/JoinAMSAT-UK/ 73 Trevor M5AKA ___ 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: Doppler Correction?
John, Very good explanation and after that I played with it a bit more last night and got it working almost fine as you can attest when we had a QSO on VO-52. So I stand corrected, and will from now on use full doppler computer control whenever possible :). 73 Mike K5TRI On Jul 24, 2011, at 9:00 PM, John Papay wrote: > The purpose of full doppler correction is to keep your signal in > the exact same spot on the receiver in the satellite. It has a finite > passband and if you don't correct your uplink, you move within that finite > passband. Theoretically a single linear transponder can support many > conversations but it will not support the maximum unless everyone stays > put at the satellite receiver. Those who don't doppler correct slide > within the > passband and run into those who are staying put. Of course if you adjust > your uplink so you stay put at the satellite, you have to adjust your > receiver to hear yourself because of the doppler shift in the other direction. > Both uplink and downlink require doppler correction in this case. > > If you don't have a rig that can be computer controlled or if you are > operating portable and can't readily incorporate a laptop into your > setup for whatever reason, then by all means manually adjust the highest > frequency since that is the one that changes three times faster than the > lower frequency in a v/u satellite. You simply do the best you can. > > However, if you have a home rig that can be computer controlled, then by all > means use a computer to adjust your doppler. Stay in one spot in the > satellite's passband. You can make faster contacts since you only have > to pick up the mic to talk or use the key to send cw. If you are working > dx and the window is short, being on frequency and staying put will help > put that distant grid in the log. > > The program does all the work but you must be sure that your keps > are current AND your computer clock is accurate to the second. On a > high pass when the satellite is overhead, the doppler changes very fast > and even a few seconds of clock inaccuracy will have you not hearing > yourself in a normal voice. At lower elevations the doppler is not as > severe so a few seconds won't make much difference. > > Use the HO-68 beacon to test your doppler correction. Set your radio for > CW with a 500 Hz or better bandwidth. Pick a high pass where the bird will > get up over 45 degrees. Tune the beacon in at your AOS and then don't touch > the dial. If the CW note stays constant over the entire pass, your system > is operating perfectly. Make sure your program settings are such that there > are frequent frequency updates. I have mine set at 1 second no matter what. > Some older radios will not accept frequency changes while you are > transmitting. In > that case, make sure you only key down for short periods of time so the > radio frequency can be updated. > > Of course you must adjust your uplink calibration on SatPC32 so that you > hear yourself on the downlink. Hearing yourself in a normal voice will > be an indication that you have your calibration set properly. > > Most of the birds stay on frequency, but I've noticed that AO-7 Mode B will > be off by 1700Hz when it changes from Mode A to Mode B. Normally we would > not observe this phenomenon but since lately we have had this mode change > while > over North America we are able to experience it. Within a few minutes, the > satellite is down to a 1200 Hz offset. I'm not sure what happens on the next > pass because it is out of my footprint. The next morning, however, the bird > is back to my normal setting. This means the frequency drifts about 1700 Hz > back down to it's steady state value. The other birds may have some slight > drifting, probably due to spacecraft temperature but it is minimal, less than > a few hundred Hz. So when you are trying to make a contact on the first > AO-7 pass in Mode B, be prepared to readjust your uplink calibration so you > can > hear yourself. It may be as much as 1700Hz at the start. > > In my opinion, everyone that can control their radio for doppler should do so. > Doppler correction gives us the maximum usage out of our linear transponders. > Why go through the agony of fiddling with your radio when your computer can > make your life so much easier. You will never have to apologize for not being > on frequency. If I wasn't able to have doppler control on my radio, I > wouldn't > spend much time on the linear birds, unless of course there was a rare grid > to be worked. > > 73, > John K8YSE > > ___ > 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
[amsat-bb] Re: Doppler Correction?
Seems to me that every program that I have tried I had to "fine tune" it just a bit. But once that "sweet spot" was found never had to touch it again. John, W0JAB ___ 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] Arissat-1: EVA 29 live stream coverage
Hello, Nasa TV Schedule reports: *August 3, Wednesday 10 a.m. - ISS Expedition 28 Russian Spacewalk Coverage (spacewalk begins 10:30 a.m. EDT.)* it seems that the deployment of ARISSat/KEDR will be one of the first tasks of the EVA, does anybody know where to find the EVA timeline? 73s Fabio Azzarello IW8QKU/5 ___ 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: Doppler Correction?
Hello John, I totaly agree with you. I work with full doppler control (rx and tx) from the moment that I started on the birds. That way I can concentrate more on seeking new stations and logging them. 73,Eric. Amateur Radio Station ON4HF Eric Knaps Satellite manager UBA Tel. +32472985876 (mobile) http://www.on4hf.be Op 25/07/2011 4:00, John Papay schreef: > The purpose of full doppler correction is to keep your signal in > the exact same spot on the receiver in the satellite. It has a finite > passband and if you don't correct your uplink, you move within that finite > passband. Theoretically a single linear transponder can support many > conversations but it will not support the maximum unless everyone stays > put at the satellite receiver. Those who don't doppler correct slide > within the > passband and run into those who are staying put. Of course if you adjust > your uplink so you stay put at the satellite, you have to adjust your > receiver to hear yourself because of the doppler shift in the other direction. > Both uplink and downlink require doppler correction in this case. > > If you don't have a rig that can be computer controlled or if you are > operating portable and can't readily incorporate a laptop into your > setup for whatever reason, then by all means manually adjust the highest > frequency since that is the one that changes three times faster than the > lower frequency in a v/u satellite. You simply do the best you can. > > However, if you have a home rig that can be computer controlled, then by all > means use a computer to adjust your doppler. Stay in one spot in the > satellite's passband. You can make faster contacts since you only have > to pick up the mic to talk or use the key to send cw. If you are working > dx and the window is short, being on frequency and staying put will help > put that distant grid in the log. > > The program does all the work but you must be sure that your keps > are current AND your computer clock is accurate to the second. On a > high pass when the satellite is overhead, the doppler changes very fast > and even a few seconds of clock inaccuracy will have you not hearing > yourself in a normal voice. At lower elevations the doppler is not as > severe so a few seconds won't make much difference. > > Use the HO-68 beacon to test your doppler correction. Set your radio for > CW with a 500 Hz or better bandwidth. Pick a high pass where the bird will > get up over 45 degrees. Tune the beacon in at your AOS and then don't touch > the dial. If the CW note stays constant over the entire pass, your system > is operating perfectly. Make sure your program settings are such that there > are frequent frequency updates. I have mine set at 1 second no matter what. > Some older radios will not accept frequency changes while you are > transmitting. In > that case, make sure you only key down for short periods of time so the > radio frequency can be updated. > > Of course you must adjust your uplink calibration on SatPC32 so that you > hear yourself on the downlink. Hearing yourself in a normal voice will > be an indication that you have your calibration set properly. > > Most of the birds stay on frequency, but I've noticed that AO-7 Mode B will > be off by 1700Hz when it changes from Mode A to Mode B. Normally we would > not observe this phenomenon but since lately we have had this mode change > while > over North America we are able to experience it. Within a few minutes, the > satellite is down to a 1200 Hz offset. I'm not sure what happens on the next > pass because it is out of my footprint. The next morning, however, the bird > is back to my normal setting. This means the frequency drifts about 1700 Hz > back down to it's steady state value. The other birds may have some slight > drifting, probably due to spacecraft temperature but it is minimal, less than > a few hundred Hz. So when you are trying to make a contact on the first > AO-7 pass in Mode B, be prepared to readjust your uplink calibration so you > can > hear yourself. It may be as much as 1700Hz at the start. > > In my opinion, everyone that can control their radio for doppler should do so. > Doppler correction gives us the maximum usage out of our linear transponders. > Why go through the agony of fiddling with your radio when your computer can > make your life so much easier. You will never have to apologize for not being > on frequency. If I wasn't able to have doppler control on my radio, I > wouldn't > spend much time on the linear birds, unless of course there was a rare grid > to be worked. > > 73, > John K8YSE > > ___ > 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. Opinion
[amsat-bb] Russians' ISS Schedule
>From the public info office of the Russian Federal Space Agency ... July 27, Wednesday ... Pre-EVA: space suit leak check, test of the suit’s communication and medical links, test of the equipment located in Pirs and Zvezda transfer compartment, charging battery for Kedr microsatellite ... July 30, Saturday ... Preparation and test initialization of the Kedr microsatellite ... July 31, Sunday ... Kedr switch-off ... Clint Bradford, K6LCS http://www.work-sat.com ___ 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] Russians' EVA29
So far Roscosmos has published this regarding the upcoming EVA29 ... Expect more info soon! This one is "old news" - from July 4 ... Russian EVA Planned for August – Alexander Samokutiaev July 4, 2011 Alexander Samokutiaev, flight engineer of the International Space Station’s expedition 28, informed about the planning for the upcoming Russian EVA in his blog in Roscosmos web. According to Russian cosmonaut, the EVA is slated for August, pending the launch of the shuttle scheduled for July 8. Alexander will work outside the ISS with his colleague Sergey Volkov. The cosmonauts are to perform several ISS RS refurbishing tasks, as well as to launch small satellite Kedr. Russian cosmonauts onboard the International Space Station switched on small spacecraft Kedr on April 12, in order to commemorate the jubilee of Yury Gagarin’s mission. Small spacecraft Kedr developed under the RadioSkaf experiment bears the name adopted by Yu.A. Gagarin call sign in his historical flight, namely Kedr. The satellite’s signal will be transmitted at radio amateur frequency of 145.95 MHz. Kedr has radio amateur call sign RS1S. RadioSkaf is implemented in the framework of UNESCO’s student space education program. Kedr will transmit different signals, images, including the talks of famous Russian scientist Kostantin Tsiolkovsky, rocket Chief Designer Sergey Korolev conversation with the first cosmonaut during his 108-min historical mission, and famous Gagarin’s “Go!” (Poekhali!), of course. From Roscosmos today ... ISS Cosmonauts Prepare for EVA July 25, 2011 Russian cosmonauts Sergey Volkov and Alexander Samokutiaev on-board the International Space Station prepare for a space walk slated for August 3. Today the cosmonauts will check EVA panels, prepare tools and replaceable items of the space suits. The objectives of the upcoming EVA include maintenance and scientific tasks, as well as launch of the Kedr microsatellite devoted to the 50th anniversary of Yury Gagarin’s space mission. This will be the first EVA for Samokutiaev, and the third for Volkov. The space walk is to commence at 18.30 MSK and to last about 6 hours. Roscosmos PAO Clint Bradford, K6LCS___ 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: Should I abandon full doppler correction?
Hi Alan! I wanted to make a couple of points regarding some of your comments from your earlier post... > There was an article in the Journal a few issues back on why the various > manual techniques are only approximations, sometimes surprisingly bad ones. > I think the author's call was WA4SCA. Yes, that WA4SCA is a good guy, smart guy. ;-) > So it does get talked about. With an > accurate clock, and current Keps it is possible to work a full pass and > scarcely touch the dial. I think some forget that even with computer control, you *can* touch the big tuning knob on your receiver to see what may be away from the center of the 50 to 100 kHz passbands. If you don't want to touch your radio(s), then use the software to tune your receiver around the passband. Everyone can't work in the few kHz around the center of the passbands and have multiple simultaneous QSOs. It has been nice to see more SSB activity on the weekends. On the past couple of Saturday mornings, I've heard SSB QSOs on VO-52 from around 145.900 MHz up to almost 145.920 MHz. Not as busy as Field Day, but you won't be out there all alone - and still have room for additional QSOs. FO-29 and AO-7 (mode B) have also had more activity on recent passes I've worked. > My default is for full Doppler correction. If the other station is using > it, fine. We can concentrate on communicating. If not, I switch off and do > it the traditional way. You don't necessarily need a computer to concentrate on communicating through the linear transponders. Computers are very useful, but not mandatory. I encourage computer control for those looking to try the SSB birds, especially with software like SatPC32. It will take some time to get the software working properly with your radio(s), so be prepared to work with your radio/computer combination. Otherwise, it will take time to get the hang of working them "old school", without the assistance of a computer. It took me 6 to 8 months, including trying different antennas and radios receiving the downlinks, before settling on my current SSB satellite station configuration. Definitely not "EasySats", like the FM birds are called, but not impossible to work. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ ___ 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: Should I abandon full Doppler correction?
One of the things I like most about MacDoppler is that I can turn the VFO and it will follow me. It does not enforce that I use the program to change frequencies. That allows one to use a simple VFO know interface to change frequencies while still having full Doppler correction. I have tried every Sat program I have been able to find (PC and Mac) and it is the nicest interface so far. To me, it is worth the $500 to get a MacMini just for this program (although I have 6 macs in the house so that was not necessary). It just clicked why most guys are around the middle of the passband if they are using computer control. If the programs put them in the middle, that is where they stay. :) I have also experienced the issue where I am doing full correction and guys that are not doing correction move into my receiver's passband. Nothing that spinning the dial will not fix but it is funny to hear. Lastly, a heartfelt thanks to all of you for your input. This has been invaluable. It lets me know that there is hope and I am not going against the grain by trying to use full Doppler. It was also nice seeing many of the calls that I have worked in the last few months. I'm getting my Gulf-Alpha beam up in the next couple of weeks so it should even get better. Thanks for you patience and guidance. 73, Tom Tom Schaefer, NY4I n...@arrl.net EL88pb Monitoring EchoLink node KJ4FEC-L 489389 DSTAR Capable | APRS: NY4I-15 On Jul 25, 2011, at 1:29 PM, Patrick STODDARD (WD9EWK/VA7EWK) wrote: > Hi Alan! > > I wanted to make a couple of points regarding some of your comments > from your earlier post... > >> There was an article in the Journal a few issues back on why the various >> manual techniques are only approximations, sometimes surprisingly bad ones. >> I think the author's call was WA4SCA. > > Yes, that WA4SCA is a good guy, smart guy. ;-) > >> So it does get talked about. With an >> accurate clock, and current Keps it is possible to work a full pass and >> scarcely touch the dial. > > I think some forget that even with computer control, you *can* touch > the big tuning knob on your receiver to see what may be away from > the center of the 50 to 100 kHz passbands. If you don't want to > touch your radio(s), then use the software to tune your receiver > around the passband. Everyone can't work in the few kHz around > the center of the passbands and have multiple simultaneous QSOs. > > It has been nice to see more SSB activity on the weekends. On the > past couple of Saturday mornings, I've heard SSB QSOs on VO-52 > from around 145.900 MHz up to almost 145.920 MHz. Not as busy > as Field Day, but you won't be out there all alone - and still have > room for additional QSOs. FO-29 and AO-7 (mode B) have also > had more activity on recent passes I've worked. > >> My default is for full Doppler correction. If the other station is using >> it, fine. We can concentrate on communicating. If not, I switch off and do >> it the traditional way. > > You don't necessarily need a computer to concentrate on > communicating through the linear transponders. Computers are > very useful, but not mandatory. I encourage computer control for > those looking to try the SSB birds, especially with software like > SatPC32. It will take some time to get the software working > properly with your radio(s), so be prepared to work with your > radio/computer combination. Otherwise, it will take time to get > the hang of working them "old school", without the assistance of > a computer. It took me 6 to 8 months, including trying different > antennas and radios receiving the downlinks, before settling on > my current SSB satellite station configuration. Definitely not > "EasySats", like the FM birds are called, but not impossible to > work. > > 73! > > > > > > > Patrick WD9EWK/VA7EWK > http://www.wd9ewk.net/ > > ___ > 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: Should I abandon full doppler correction?
When I bought my TS2000 several years ago I too played "chase the downlink" for about a week and did a fair job. But if it was annoying to me to have to do that, I knew how annoying it must have been to other, Doppler controlled stations chasing me. I am not a computer whiz by any means, but my frustration, and desire to avoid the 2 meter repeater characteristics of the FM birds and favor quality QSOs on the linear birds drove me to download and set up SATPC32. After a bit of study on how the CAT control works, I had it dialed in. This took place over about a 3 day period. Since my first full Doppler controlled QSO, I have never ever gone back to manual tuning- although some small adjustments are often required on real high passes. As someone said earlier, it makes lengthy roundtable QSOs possible and is a kick watching everyone's freqs move with yours as you watch the satellite light up each station's QTH. Another satisfied customer (and regular on VO52, AO7 and FO29- thanks and with regards to Erich DK1TB) Craig N6RSX -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Michael Schulz Sent: Sunday, July 24, 2011 3:34 PM To: Tom Schaefer, NY4I Cc: Amsat BB Subject: [amsat-bb] Re: Should I abandon full doppler correction? Tom, I tried full doppler control with HRD's sat tracking software and wasn't really thrilled to say the least. I may again try Macdoppler as it's so far the best sat program I've seen but my main shack machine unfortunately is a Windows box because HRD's logging software is more convenient than MacloggerDX with regards to eQSL and LOTW. The other reason I do it all manual (both doppler and rotor control) is that I like to be in control :). If I would leave it all to the computer and all I'd have to do would be press the PTT then where's the fun in that? IMHO it's great building all the computer control as a PoT but then when it works it becomes boring :). I heard you loud and clear on FO-29 today. 73 Mike K5TRI On Jul 24, 2011, at 4:17 PM, Tom Schaefer, NY4I wrote: > Hi all, > > I just tried a nice pass on FO-29. I heard K9CIS on CW and W5BK from Texas. > In both cases, while I am using full doppler correction with my 9100 and > MacDoppler, I suspect they are leaving the transmit frequency fixed as they > both changed frequency. K9CIS on CW was quite extreme in the Doppler shift. I > know that this is a by-product of me using full doppler to listen to stations > that are not, but it seems that the majority of the stations I hear are NOT > using flu doppler. I have asked this question before, but it seems to be > happening more frequently. > > Should I abandon full doppler correction? Another less black-and-white step > is that if I hear a station moving to adjust my settings so I am not doing > full doppler. > > Has anyone ever taken a survey to see how many satellite users actually use > full doppler. Am I assuming more guys use computers and anyone of the > multiple ways to do computer control that have ben available for years? Does > anyone ever talk about this in AMSAT circles? Sort of like the encouragement > one gives to people afraid of LOTW to try it? "Computers in the > shack...NEVER!" I exaggerate but it seems that way. Then again, being a > computer person and having computer capable rigs I realize I am skewed in my > expectations. I know there are guys working with old 271/471 pairs or even > the old FT726 out there. Great radios and a simple way to do it, but even > they have ways to do full doppler control and they have been out for 20 years. > > Thanks, > > Tom > Tom Schaefer, NY4I > n...@arrl.net > EL88pb > Monitoring EchoLink node KJ4FEC-L 489389 > DSTAR Capable APRS: NY4I-15 > > > > > ___ > 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 NOTICE: This communication may contain privileged or other confidential information. If you are not the intended recipient of this communication, or an employee or agent responsible for delivering this communication to the intended recipient, please advise the sender by reply email and immediately delete the message and any attachments without copying or disclosing the contents. Thank you. ___ 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] ISS Views STS-135 Re-entry
NASA PHOTO - http://www.nasa.gov/images/content/573236main_iss028e018218_full.jpg Station Crew Views Shuttle Landing This unprecedented view of the space shuttle Atlantis, appearing like a bean sprout against clouds and city lights, on its way home, was photographed by the Expedition 28 crew of the International Space Station. Airglow over Earth can be seen in the background. Image Credit: NASA I have run out of monitors for all these incredible "screensaver/wallpaper" NASA photos ... Clint Bradford, K6LCS ___ 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: Should I abandon full Doppler correction?
NY4I wrote: One of the things I like most about MacDoppler is that I can turn the VFO and it will follow me. It does not enforce that I use the program to change frequencies. That allows one to use a simple VFO know interface to change frequencies while still having full Doppler correction. W9AE replies: SatPC32 provides three methods to tune across the passband of a linear transponder while under full Doppler control: 1. With the radio's VFO knob (most peoples' preference) 2. With the mouse, by clicking the on-screen tuning buttons (for example, to go up 5 kHz with a single click) 3. With the keyboard: up/down arrow keys for 100 Hz increments left/right arrow keys for 20 Hz increments +/- keys for 10 Hz increments Methods 2 and 3 only work when SatPC32 is the active program window. They don't work if, for example, your logging program is the active window. SatPC32 doesn't force users to start Doppler tuning in the middle of the passband. That's the default, but it's easy to modify the Doppler.SQF file to start away from center, or on the beacon frequency. Wayne Estes W9AE Oakland, Oregon, USA, CN83ik ___ 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] Steve Bible blogs about ARISSat-1 on EE Times web site.
Our friends at Microchip are stirring up some interest in our project outside the ham radio world. http://www.eetimes.com/electronics-blogs/chips-in-space/4218140/The-Building-of-an-Amateur-Satellite-1 -Joe KM1P ___ 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: ISS Views STS-135 Re-entry
On 07/25/11 14:27, Clint Bradford wrote: > NASA PHOTO - > > http://www.nasa.gov/images/content/573236main_iss028e018218_full.jpg > > Station Crew Views Shuttle Landing > > This unprecedented view of the space shuttle Atlantis, appearing like a bean > sprout > against clouds and city lights, on its way home, was photographed by the > Expedition > 28 crew of the International Space Station. Airglow over Earth can be seen in > the > background. > > Image Credit: NASA > > I have run out of monitors for all these incredible "screensaver/wallpaper" > NASA photos ... > > > Clint Bradford, K6LCS > This doesn't make any sense to me. It looks like a launch, not a descent. If the shuttle went down at that angle it would be toast. I think they got their captions wrong? --STeve Andre' wb8wsf en72 ___ 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] ARISSat-1 Battery
OK - Charging of the ARISSat-1's battery is scheduled for July 27. And a test this weekend. Will the battery be charged a second time - before EVA-29 on August 3? What is the expected/anticipated battery "charge state" to be after the July 30 test? Good enough for deployment without another charge? Clint Bradford, K6LCS ___ 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: ISS Message Board
Curious.. If Gordon (always ready with a cheerful comment) is accurate, then what is the purpose of the BBS? Also, Kevin is far from 'selfish'...he is just using the available resources. Helpful education is far more useful than lame name calling, Gordon. Ted, K7TRK -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Gordon JC Pearce Sent: Sunday, July 24, 2011 6:46 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: ISS Message Board On Sun, 24 Jul 2011 05:07:16 -0700 Kevin Deane wrote: > > Good morning Jeremy, saw your message but she fell out of veiw...Thanks KG6NUG for the cool flag that came up on my end anyway!! > > Glad to see active people and not BEACONS using the ISS Digi. Dont get me wrong, they serve their purpose... The problem is that when you use the packet BBS on the ISS, it stops digipeating packets for anyone else. So, for that entire pass, you're the only person who can work the ISS. Don't be selfish. -- Gordon JC Pearce MM0YEQ ___ 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: ISS Views STS-135 Re-entry
On 07/25/11 19:04, Vince Fiscus, KB7ADL wrote: > At 05:38 PM 7/25/2011 -0400, you wrote: >> On 07/25/11 14:27, Clint Bradford wrote: >> > NASA PHOTO - >> > >> > http://www.nasa.gov/images/content/573236main_iss028e018218_full.jpg >> > >> >> This doesn't make any sense to me. It looks like a launch, not a >> descent. >> If the shuttle went down at that angle it would be toast. >> >> I think they got their captions wrong? >> >> --STeve > > > I thought that too until I took another look at it. This is a two > dimensional view of three dimensional space, so things in the photo > might give a different impression than what is described by it. The > decent only looks step because the earth is a sphere and the orbiter's > track in this view is away from the ISS. > > 73 > KB7ADL > I'm struggling to 'get' this. It's certainly an interesting optical illusion, or whatever this kind of misleading effect is... Thanks, I'll ponder this! --STeve Andre' wb8wsf en72 ___ 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: Cubesat NANOSATC-BR
- Original Message - From: "ps8rf Piraja" To: Sent: Saturday, July 23, 2011 3:53 PM Subject: [amsat-bb] Cubesat NANOSATC-BR Brazil is preparing to launch the NANOSATC-BR. The design of the BR-NANOSATC is being developed by the National Institute for Space Research (INPE) and students of Federal University of Santa Maria (UFSM) of state Rio Grande do Sul here in Brazil. "The BR-NANOSATC will have two scientific instruments, a magnetometer and also a particle detector of precipitation for monitoring real-time geospatial, and the precipitation of particles in the magnetosphere disturbances on the Brazilian territory to determine its effects on regions such as the South Atlantic Magnetic Anomaly (SAMA, the English acronym) and the Brazilian sector of the equatorial electrojet. This anomaly [SAMA] is a "failure" of the Earth's magnetic field in this region, which is about Brazil, "said Jose Manuel Octavio Coordinator of the National Institute for Space Research of Brazil. As a consequence of this anomaly, there is a greater risk of the presence of particles high-energy region, which can affect communications, signals from global positioning satellites (like GPS), or even cause failure of electronic equipment such as onboard computers. The INPE has been studying this anomaly for decades, including several researchers international reputation, which even took part in defining the mission and its payload. " According to Otavio Durão, Technical Coordinator NanosatC-Br and INPE, the situation referred to is its launch in November 2012. The uplink frequency (UHF) and downlink (VHF) have been allocated by the IARU. The telemetry will be at 145.865 MHz 9k6 BPSK. The project is receiving support from the Amateur Radio Association Santamariense - ASRA and call sign of the control station will be PY3EB. Durão told me it will be very interesting and welcome the participation of the Amateur Radio satellite tracking. We are waiting for soon the website with all the information the CubeSat NANOSTC-BR. The project is in full swing. IARU Informations: http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=209 73' Pirajá, PS8RF Hi Piraja', PS8RF Daily I see news about new CubeSat's.. but like the one you mentioned (build by commercial company), most of them have nothing to do with Ham Radio anymore. Ham Radio is only the vehicle to use our frequencies, that's all.. they are not interested in ham radio... I think it will not take long and we may loose our satellite frequencies to the CubeSat community of institutes, industry, etc... On the other hand, if the worldwide ham radio community does not support P3-E, how can AMSAT-DL ever finish it and get it launched ? I'm still optimistic regarding an affordable launch for P3-E in the future but it may happen that we have a launch but AMSAT does not exist anymore due to the lack of money to keep the world wide organization running.. The old HEO satellite users of OSCAR-10, OSCAR-13 and AO40 are becoming old and they are very tired to wait for a real new satellite capable to supply a worl wide communications better than on HF as promised to us by AMSAT many years ago and this is why the numbar of AMSAT member is reducing and the strenght of AMSAT is rapidly diminishing or do not exist anymore like actually occurs to AMSAT-France. You writes only "Brazil is preparing to launch the NANOSATC-BR" so that my question is " does AMSAT-Brazil (BRAMSAT) exist anymore ? " 73" de i8CVS Domenico ___ 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: ARISSat-1 Battery
Hi Clint, The battery can run ARISSat-1 for about 6 days on the ISS so it will still be almost fully charged if they run it for just 1 day. Once it is deployed, the solar panels will charge the battery. 73, Tony AA2TX --- On 7/25/2011 6:39 PM, Clint Bradford wrote: > OK - Charging of the ARISSat-1's battery is scheduled for July 27. And a test > this weekend. > > Will the battery be charged a second time - before EVA-29 on August 3? > > What is the expected/anticipated battery "charge state" to be after the July > 30 test? Good enough for deployment without another charge? > > > Clint Bradford, K6LCS > > > > > ___ > 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: ISS Message Board
> If Gordon ... is accurate, then what is > the purpose of the BBS? None practically. It is the most inefficient AX.25 packet arrangement possible. AX.25 connected packet depends on line-by-line ACKS. This works on a two-way balanced link when both stations hear each other reliably and without interference. But the Earth to ISS path is anything but balanced. It is solid ISS to earth, but the other way is probably 10% if that much. Thus, for each packet delivered, there are 10 RETRIES or more than 20 packets on channel to deliver EACH LINE. But it is even worse than that. The ISS uses AX25V2L2 which means it does not even send a RETRY without first sending a "what was your last heard line number" packet. SO it will not even retry a single line until TWO more packets have been exchanged. Now multiply that by the 10% channel performance and it might take 20, 30 or 40 packets to deliver just ONE LINE. That is why if someone logs onto the BBS, that the pass is more or less wasted. The logee never gets a successful download due to all the bazillions of inefficient overhead, and no one else gets to make any digipeated contacts either. Just listen to a BBS pass, and its wall to wall packets, but only a line or two are actually delivered in most cases. The only true use of the BBS is possible if the ground station is using a few kilowatts of ERP to make sure that there are no missing ACKS! Something like that, Bob, WB4APR ___ 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: ISS Message Board
On Mon, Jul 25, 2011 at 03:43:03PM -0700, Ted wrote: > Curious.. > > If Gordon (always ready with a cheerful comment) is accurate, then what is > the purpose of the BBS? Also, Kevin is far from 'selfish'...he is just using The BBS is a side effect of the commercial equipment (Kenwood) they took up there. Many of us do think it should be disabled. > the available resources. Helpful education is far more useful than lame name It's the way Gordon is, he's a nice chap online (on IRC). Don't take it the wrong way. The pair of you should go have a beer together or something. He's just a typical dour direct Scot, but he will drink you under the table. ;-) - 73 Diane VA3DB -- - d...@freebsd.org d...@db.net http://www.db.net/~db Why leave money to our children if we don't leave them the Earth? ___ 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: ISS Views STS-135 Re-entry
At 05:38 PM 7/25/2011 -0400, you wrote: >On 07/25/11 14:27, Clint Bradford wrote: > > NASA PHOTO - > > > > http://www.nasa.gov/images/content/573236main_iss028e018218_full.jpg > > > >This doesn't make any sense to me. It looks like a launch, not a descent. >If the shuttle went down at that angle it would be toast. > >I think they got their captions wrong? > >--STeve I thought that too until I took another look at it. This is a two dimensional view of three dimensional space, so things in the photo might give a different impression than what is described by it. The decent only looks step because the earth is a sphere and the orbiter's track in this view is away from the ISS. 73 KB7ADL ___ 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] Guildford Talk - The Interplanetary Internet by Lloyd Wood
The Amateur Radio satellite OSCAR-36 (UoSAT-12) and the UK-DMC satellite were used for the first tests in space of the "Interplanetary Internet" Lloyd Wood PhD, MSc, MEng, CEng MIET of the University of Surrey Centre for Communication Systems Research (CCSR) will be giving a talk to the AMSAT-UK International Space Colloquium about this exciting pioneering work in bringing the Interplanetary Internet and terrestrial Internet together. His talk will describe how pioneering tests of computer networking on Surrey Satellite Technology's satellites (UoSAT-12 and UK-DMC) were able to integrate the satellites with the terrestrial Internet, and then conduct the first tests in space of the "Interplanetary Internet" that is designed for NASA's deep space missions. The talk takes palce 16:10 - 16:50 BST on Satuday, July 30, there will be a live webstream at http://www.batc.tv/ch_live.php?ch=3 IPv6 in space http://info.ee.surrey.ac.uk/Personal/L.Wood/dtn/interplanetary-internet Delay-Tolerant Networking work: http://personal.ee.surrey.ac.uk/Personal/L.Wood/dtn/ John Lloyd http://www.ee.surrey.ac.uk/CCSR/profiles?s_id=5839&; The AMSAT-UK International Space Colloquium to be held July 30-31 at the Holiday Inn, Guildford, GU2 7XZ, England. The event is open to all. Either day passes or full packages comprising overnight accommodation and meals are available. For futher information see http://www.uk.amsat.org/colloquium-2011/ The Colloquium schedule, times in BST (GMT+1), is at http://tinyurl.com/2011ColloquiumSchedule The Spring issue of the AMSAT-UK newsletter OSCAR News can be downloaded free at http://www.uk.amsat.org/on_193_final.pdf Join AMSAT-UK at http://tinyurl.com/JoinAMSAT-UK/ ___ 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] ARISSat-1 - Another Charging Time Scheduled?
OK - Charging of the ARISSat-1's battery is scheduled for July 27. And a test this weekend. Will the battery be charged a second time - before EVA-29 on August 3? What is the expected/anticipated battery "charge state" to be after the July 30 test? Good enough for deployment without another charge? Clint Bradford, K6LCS ___ 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] ISS BBS/Message Board
So the general opinion on here and from some people across the world is that using the BBS ruins the pass for basicly everyone in the footprint. Well after my friend in Reno could not get a message on while I was on the BBS and myself while he was on it, I can see the truth of the matter is clear. I am new to radio and Packet/APRS, learning and having fun. I will just have fun blastin away at the message board and hope to catch someone at there keyboard. I do sympathize with anyone who was not able to get on while I was getting messages from actual people that helped me get started with Packet in France and the Czech Republic. I will stay off the BBS, unless in the future if I find someone who wishes to have a Digi Qsl via ISS BBS who is outside my footprint, then at least I will KNOW I am being selfish and will enjoy hogging the ISS only just a little bit less now. Kevin KF7MYK ___ 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: ND9M/P: DM35 / DM36
Jim, Hope to catch you again soon from a rare grid. Seems whenever you're out there, I can't get on the air for whatever reason. When are you working SSB? I need a few rare counties in AZ for the AZ Worked all Counties award. Are you planning on being on Sat or Phone in any of the following counties before heading out: Coconino Apache Greenlee Graham Pinal Gila Yuma (I know that ones been done, just throwing it in for completeness ;)) Thanks for the opportunities you give or us to grab rare grids. Hope you're enjoying the trip. Clear Skies Rick Tejera Saguaro Astronomy Club Phoenix, Arizona www.saguaroastro.org saguaroas...@cox.net K7TEJ, AMSAT 38452 -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of clar...@aol.com Sent: Sunday, July 24, 2011 21:35 To: amsat-bb@amsat.org Subject: [amsat-bb] ND9M/P: DM35 / DM36 Cori and I will be on from DM36 (possibly the grid line with DM35) on AO27 tomorrow (Monday) at 25/2043Z (approx turn on at 2047Z). Later on, we'll head south a bit and be on from DM34 and then green stamper DM33 after that. I don't know what pass(es) that will be however, but I know that Patrick, WD9EWK, has got those two pretty well covered anyway. We're still running all Arizona counties on HF CW and SSB, which really puts a dent in efficient grid ops, but we'll be turning toward the northeast in a couple days. Then we'll head for the much-in-demand DM66 grid in NM shortly after that. Also, now that we're back in AZ, tracking via APRS (ND9M-7) is more reliable again. 73, Jim, ND9M / VQ9JC Flagstaff, AZ / DM66 ___ 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] Trip Report - CN90 Portable Northern California
Hi Everyone, This weekend I was able to sneak in some satellite operating during a camping trip with my XYL. We went up to Eagle Lake in Lassen National Forest, which is in Northern California and grid CN90. I had no idea if satellite operation would even be possible from that location (time-wise or terrain-wise) but it turned out it was pretty good! The lake had low mountains around it, not more than a few degrees above the horizon in all directions. I was able to work quite a few satellite passes there, and it was a lot of fun talking to friends in the sat community from that somewhat remote location! The equipment worked well, and I learned the importance of verifying the computer has updated keps before leaving home! My netbook computer had keps that were several months old, which made computer-aided tuning of the linear birds almost impossible! Ugh, lesson learned, and another opportunity to practice manual tuning. Patrick's suggestion of headset and voice recorder really worked well though! I've put some pictures on the website at: http://kb5wia.blogspot.com/2011/07/camping-and-satellites-grid-cn90.html Anyone who worked me and wants a QSL card, just send me an email. 73 de Dave KB5WIA ___ 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: Doppler Correction?
> On Jul 24, 2011, at 9:00 PM, John Papay wrote: > > Of course you must adjust your uplink calibration on SatPC32 so that you > > hear yourself on the downlink. Hearing yourself in a normal voice will > > be an indication that you have your calibration set properly. Hello John, When I transmit I do not hear myself on the downlink. How do I adjust the uplink calibration in SatPC32 ? Paul Delaney - K6HR paul.hamra...@verizon.net http://k6hr.dyndns.org:8080 ___ 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
