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:
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
73 . . . Steve, WB8IMY
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?
A power point presentation on this soon to be launched South African
satellite can be downloaded from
The presentation is by Dr Gert-Jan van Rooyen, ZS1GVR and is dated 22nd Feb
The 80kg satellite includes an AO-51 type VHF up and UHF down repeater as a
Launch may be as early as the end of March.
I saw on the AO-27 web page:
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.
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
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
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
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.
Mark L. Hammond [N8MH]
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.
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...:(
Mark L. Hammond [N8MH]
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.