AMSAT-BB February 2009

171 participants
239 discussions

Call for Papers--2007 ARRL/TAPR Digital Communications Conference

by Ford, Steve, WB8IMY

Technical papers are solicited for presentation at the 26th Annual ARRL and TAPR Digital Communications Conference to be held September 28-30, 2007 in Hartford, Connecticut. These papers will also be published in the Conference Proceedings (you do NOT need to attend the conference to have your paper included in the Proceedings). The submission deadline is July 31, 2007. Please send papers to: Maty Weinberg ARRL 225 Main St Newington, CT 06111 or you can make your submission via e-mail to: maty(a)arrl.org Papers will be published exactly as submitted and authors will retain all rights. 73 . . . Steve, WB8IMY ARRL

9 years, 6 months

ISS Packet 13.44utc UK Pass

by David Barber

Accessible again this pass (1200bps) but something up there has changed. Very quiet today (few stations) and very difficult to get through in comparison to recent days. David G8OQW

12 years, 10 months

Question about NOAA-19

by Mark Lunday, WD4ELG

Today, I downloaded the latest Keps into HRD after being offline for 2 weeks. Suddenly, I noticed NOAA-19 listed as having a pass today. It shows an FM repeater capability. Wow. I need to keep up, I did not catch this new FM bird. Or am I out of synch and this is not correct? Mark Lunday WD4ELG wd4elg(a)arrl.net http://wd4elg.net

12 years, 11 months

Sumbandila satellite info.

by G0MRF＠aol.com

A power point presentation on this soon to be launched South African satellite can be downloaded from _http://www.amateurradio.org.za/Sumbandila_Intecnet.pdf_ (http://www.amateurradio.org.za/Sumbandila_Intecnet.pdf) The presentation is by Dr Gert-Jan van Rooyen, ZS1GVR and is dated 22nd Feb 2009. The 80kg satellite includes an AO-51 type VHF up and UHF down repeater as a secondary payload. Launch may be as early as the end of March. Regards David

12 years, 11 months

AO-27 may return, once again...

by Patrick STODDARD (WD9EWK/VA7EWK)

Hi! I saw on the AO-27 web page: http://www.ao27.org/ that the satellite is transmitting once again. From the schedule posted on that page, it appears it will be transmitting several minutes of data on the same passes it would have been on in the past (for a few minutes over the Northern Hemisphere). Let's hope all checks out well, so this satellite can return to normal (for AO-27) operation soon. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/

12 years, 11 months

ARRL Satellite Handbook

by Bruce

Looking for something to keep you busy on those cold New England evenings? How about something to take with you to the beach while you catch some rays. Or even after hiking to the top of your favorite mountain and enjoying the breath taking view? The ARRL Satellite Handbook by Steve Ford, WB8IMY, is the perfect publication to take with you. For the new satellite and seasoned operator, this is for you. Now available at the AMSAT online store. Visit http://www.amsat.org and click on Online Store from the menu on the left. Follow the link to Publications 73...bruce AMSAT Online Store Manager (amongst other things) -- Bruce Paige, KK5DO AMSAT Director Contests and Awards ARRL Awards Manager (WAS, 5BWAS, VUCC), VE Houston AMSAT Net - Wed 0200z on SkyScanner Satellite Radio Network on Galaxy-25 @97° West, Transponder 23 (12115 Vert), Symbol Rate: 22425, APID: 1794 (DVB Free To Air) Also streaming MP3 at http://www.amsatnet.com Podcast at http://www.amsatnet.com/podcast.xml or iTunes Latest satellite news on the ARRL Audio News http://www.arrl.org

12 years, 11 months

AO-7 70cm beacon

by David Giles

Hello All, I have just heard AO-7's 70cm beacon. I reckon the frequency to be 435.106MHz. The signal bandwidth was 100Hz and rather weak. I couldn't determine any modulation. So, if you find AO-7 in mode A, try the 70cm beacon. 73 de David VK5DG

12 years, 11 months

DO-64 over U.S.?

by Mark L. Hammond

Hello all, Has anybody in the US successful copied Delfi-C3/DO-64 in the last month? Since the satellite was configured into its current science mode with infrequent packets (nearly a month ago), I haven't been able to copy it. Just trying to determine if it's bad luck or what. Thanks for your reports. 73, Mark L. Hammond [N8MH]

12 years, 11 months

Re: AO-16 @ the 21:16 pass--UPDATE

by Mark L. Hammond

Hi Marv, For the last several weeks AO-16 has been in an orbit that prevents its operation for extended periods. Currently the satellite transmitter won't stay up for more than a minute or two at a time. We are seeing cooler internal temps, and this causes the satellite to reset. What you were hearing was me commanding the PSK transmitter ON and then the satellite shutting itself off (or resetting itself...) When my schedule permits I try to turn the bird ON during afternoon/early evening passes over the east coast of the US. I can't make every day or every pass, but I do what I can. In reality, the bird isn't staying UP long enough to be much use--and you saw that today. Sadly it looks like this is the way the bird will be for the next several years--unless something in the satellite changes (aging, radiation, etc.) for the better! In all likelihood, it might actually get worse. To all users: If you hear the satellite "humming", it is in the digital mode. Please do not transmit to the satellite while it is in the digital mode. Rather, wait for the humming to go away and listen for the characteristic carrier, which means that the bird is in "voice mode" and will then support voice operations. 73, Mark N8MH AO-16 Command Station Subject: [amsat-bb] AO-16 @ the 21:16 pass > * From: "racer5039" <<mailto:[email protected]>[email protected]> > * Date: Sat, 28 Feb 2009 16:31:05 -0600 > >---------- > >Was it just me or was AO-16 having a problem? >It was a very high pass for me @ the 21:16 pass. >I could hear a tone of some kind and then it would drop off. No tone or anything >I had one conteact but I don't think I got the call right. >Think I may have a radio problem...:( >Marv. >N0FJP Mark L. Hammond [N8MH]

12 years, 11 months

AO-7 70-cm Beacon is on!

by DeYoung James

Greetings, The AO-7 70-cm beacon was monitored with very strong signals during the 2009 February 28 22:52-23:14 UTC pass from FM18. The beacon was in a two-state mode that sounded a bit like RTTY in idle. The shift was about 50-Hz between the two states. The nominal zero Doppler frequency appeared to be around 435.1056-MHz and was rock-steady through the pass. 73, Jim, N8OQ

12 years, 11 months

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AMSAT-BB February 2009