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
Dear AMSAT friends
My pacsat station is for sale:
Kenwood TS-790A 144/432/1200 MHz transciever
with the following extras:
* UT-10 1200 MHz module
* Symek IFD-B board (for speed up to 76000 bd)
* extended rx (on 3 bands)
* 9600 baud tx/rx
* 100ms mute disabled
* IFD-B board (38400 baud rx)
* Hand microphone
* DC cable
* Instruction Manual (in english) include schematics
* External Control Instruction Manual (in english)
* Modifications documentation (in english)
All mods were performed by me and no holes were done.
This equipment was bought new (1997), and until now
there was not a single problem! It was kept on a non
Cosmetic is a 8/10 (one minor dent, sort of paint bubble
and 4 rotator control box feet "stain", all on top cover)
Unfortunatly I don't have the original box anymore. Sorry
TNC Symek TNC31S
* Tx 9600/Rx 38400 baud card
* 128kb RAM
* 512kb Flash-EPROM
* English mailbox
* Kiss autostart
* RS232 cable plus adapter (DB9)
* DC cable
* Diskette with software
* Original Manuals (english and german)
This TNC was bought new (2000), and was used on UO-36
and Tiungsat-1 with great sucess. I did't use it since
a long time ago, but I belive it's 100% operational.
Cosmetic is 9/10.
I will only sale the 2 items together. Price: 1500 Euro
Buyer pays shipping.
Euro countries: Bank money transfer only!
Elsewhere: Western Union or PayPal.
Photos: please visit http://ct1eatsale.no.sapo.pt/
Thanks for your attention.
See you on P3E or Eagle.
73 F.Costa, CT1EAT
I've been considering petitioning the IOTA board to make a special award for IOTA contacts made via satellite. Right now their rules (http://www.rsgbiota.org/rules/rules.pdf, Para C.3.10) do not allow satellite contacts for any award.
Are there others here that would support such a petition?
I have a question regarding software doppler correction - in particular
when using linear satellites.
I am working on some control software that is a little more flexible than
what I've used. I really like SatPC32 on Windows and Predict/gsat on
Linux. I haven't yet fallen in love with any available software, but
that's really a different story.
I can imagine that doppler correction for an FM sat is rather easy in that
you simply tune the transmitter/receiver to the published frequencies
depending on the operating mode.
I'm a little less sure how that would work for a linear satellite. As
mentioned before, I do have a chart from AMSAT that lists channelized
frequencies for them. If I can tune the transmitter such that the
frequency at the satellite is one of the listed frequencies, how sure can
I be that the receive is as published?
Can I extend that to the point where I would be able to automatically
determine frequencies (at the satellite) of the downlink for a given
uplink and then compute doppler from there? It would then be fairly
convenient to tune within the satellite's passband and let the computer do
Thanks for any feedback.
Excellent advice Tom. Let me add a few things if you don't mind. If you cannot implement full doppler computer tuning, the next best practice is to tune the higher frequency, in this case the uplink. Use full duplex and the minimum power required. VO-52 is quite sensitive and overloads easily; expect this to be the norm on FD.
Don't forget AO-7. It could be in either Mode U/V (aka Mode B) or Mode V/A (aka Mode A). FO-29 may also be back in time for FD, we just don't know. I expect the majority of points to be made on the transponder satellites; please observe the one QSO per FM repeater rule (1 via AO-27 and SO-50, and 1 each via the L/U and V/U repeaters on AO-51).
For the true diehard satellite operator there is AO-16! The 1200 baud BPSK downlink is easily decoded with MixW soundcard software, and the uplink requires Manchester FSK at 1200 baud. This is the tough part. QSOs can be completed via digipeating through the satellite, but the BBS is non-operative.
GO-32 is a good bet too if the BBS is up and running.
Good Luck on Field Day!
73, Drew KO4MA
AMSAT-NA VP Operations
>From: Thomas McDaniel <tmcdanielsprint(a)earthlink.net>
>Sent: Jun 3, 2007 8:44 PM
>To: kc6uqh <kc6uqh(a)cox.net>, AMSAT-BB <amsat-bb(a)amsat.org>
>Subject: [amsat-bb] Re: VO-52
>I don't know of a site for this satellite with operating information.
>However, this is what used to be called a Mode B satellite -- 70 CM LSB
>uplink and 2 Mtrs USB downlink with a reverse transponder. Because the
>satellite is in a very low orbit I highly recommend a computer controlled
>transceiver (FT-847, IC-910, TS-2000 or etc.) and SatPC32 (you can get a
>free download to test with from Eric's web site:
>http://www.dk1tb.de/indexeng.htm ). We generally use the "one true rule,"
>that is computer control both up and down link to stay in one spot on the
>For antennas, we will be using RH circular beams and automatic tracking, but
>I expect you could use an Arrow type antenna with someone manually pointing
>in the general direction -- turnstiles, egg beaters or other omnis may work
>ok but I haven't tried them.
>Finally, practice before Field Day to "work out the bugs" is highly
>73 Tom n0ntx
>AMSAT Area Coordinator
>Colorado Springs, CO
>----- Original Message -----
>From: "kc6uqh" <kc6uqh(a)cox.net>
>To: "AMSAT-BB" <amsat-bb(a)amsat.org>
>Sent: Sunday, June 03, 2007 12:45 PM
>Subject: [amsat-bb] VO-52
>>I am considering using VO-52 for Field Day. Could anyone direct me to a
>>site with operating information, not bragg tapes on this satellite. I
>>found the Indian site but I could not find any real technical information.
>>The AMSAT frequency guide mentions both Indain and Dutch transponders shows
>>only one set of frequencies and no suggestion as to USB tX or RX does
>>indicate U TX and V receive. Uses turnstile antennas, Rh or Lh Circular?
>> Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>> No virus found in this incoming message.
>> Checked by AVG Free Edition.
>> Version: 7.5.472 / Virus Database: 269.8.7/830 - Release Date: 6/3/2007
>> 12:47 PM
>Sent via AMSAT-BB(a)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
31 August 2007
During the period 15 July to 31 August 2007, The satellite has remained
silent. Eclipses finished on 20 August. Previous observations indicated
that anytime after 10 August there would have been sufficient solar
power to support continuous operation.
Owing to the lack of accurate timings, it is impossible to predict when
sustained beacon operation will restart, although this is expected any day
now. When the beacon starts it is expected to operate 10 days ON followed
by 10 days OFF.
The satellite is now in continuous sunlight, and this will continue until
14 November, when a short eclipse season starts.
I have received one reception report, from Jim G3WGM, who heard weak
signals at the end of a pass on 01 August. Many thanks JIM.
The Beacon frequencies are -
VHF 145.826 MHz. AFSK FM ASCII Telemetry
UHF 435.025 MHz. OFF
S-band 2401.5 MHz. OFF
Listeners to OSCAR-11 may be interested in visiting my website. The current
monthly bulletin contains further details of the satellite's status. If
you need to know what OSCAR-11 should sound like, there is a short audio
clip for you to hear. The website contains an archive of news & telemetry
data. It also contains details about using a soundcard or hardware
demodulators for data capture. There is software for capturing data, and
decoding ASCII telemetry. The URL is www.users.zetnet.co.uk/clivew/
If you place this bulletin on a terrestrial packet network, please
use the bulletin identifier $BID:U2RPT136.CWV, to prevent duplication.
73 Clive G3CWV xxxxx(a)amsat.org (please replace xxxxx by g3cwv)
For the AO-7 afficiondos.
Please peruse the following link ... <http://observations.biz/AO7_Paper/>
... it should serve to clear up any misunderstandings regarding any comments
I have made in the past re: AO-7.
Thanks to GM1SXX for the donkey work ... (By yon bonny banks and by yon
bonnie 'brays') ??.
73 John. <la2qaa(a)amsat.org>
And for those attending HAMCOM, I'll be presenting my 'Work AO-51 with your HT' session at the 7pm meeting of the Long Beach ham club at the event's hotel. All are invited!
Clint, K6 LCS
Sent from my Treo(r) smartphone
From: Jim Jerzycke <kq6ea(a)pacbell.net>
Date: Thursday, Aug 30, 2007 8:44 pm
Subject: ARRL SW Division HAMCON AMSAT Booth
To: Clint Bradford <clintbrad4d(a)earthlink.net>, amsat-bb(a)amsat.org
And for those that are planning on attending The ARRL
HAMCON in Torrance at the Mariott the weekend of
September 7th, 8th, and 9th, Duane Naugle, KO6BT, and
I will be manning the AMSAT booth!
AMSAT will make its presence known at the Amateur Radio Expo area of
the LA County Fair this year!
I'll be manning an AMSAT booth all day on September 8, 15, 23, and
30. If you are available to help out for a few hours, I can get you a
parking pass and Fair entrance ticket!
Call or send email asap.
Clint Bradford, K6LCS
AMSAT Area Coordinator
From: NASA News <hqnews(a)mediaservices.nasa.gov>
To: NASA News <hqnews(a)mediaservices.nasa.gov>
Date: Wed Aug 29 13:50:00 EDT 2007
Subject: NASA Safety Review Finds No Evidence of Improper Alcohol Use
by Astronauts Before Space Flight
Aug. 29. 2007
David Mould/Michael Cabbage
NASA SAFETY REVIEW FINDS NO EVIDENCE OF IMPROPER ALCOHOL USE BY
ASTRONAUTS BEFORE SPACE FLIGHT
WASHINGTON -- A NASA safety review released Wednesday found no
evidence to support claims that astronauts were impaired by alcohol
when they flew in space. NASA chief of Safety and Mission Assurance
Bryan O'Connor conducted the monthlong review to evaluate allegations
included in the Astronaut Health Care System Review Committee's
report, which was released in late July.
"I have said many times during the past weeks that NASA takes these
allegations very seriously -- just as we would any issues that could
impact the safety of our missions," NASA Administrator Michael
Griffin told a news conference at NASA Headquarters. "But at the same
time, I also have said that the stories cited in the report seem
improbable to those of us familiar with the astronauts' rigorous and
very public activities during the hours leading up to a space
O'Connor's review covered the past 20 years of space flight and
approximately 90 interviews with participants and witnesses to the
last few days before shuttle and Soyuz launches, including current
and former astronauts, flight surgeons, research and operations
support nurses, shuttle suite technicians, closeout crew technicians
and the managers and staff of crew quarters, including managers
familiar with the crew quarters in Kazakhstan;
a review of more than 40,000 records dating back to 1984, including
mishap and close call reports, anonymous safety reports, safety
hotline reports and disciplinary actions involving alcohol and drugs.
These records cover 94 shuttle missions and 10 Soyuz missions;
a review of relevant policies, procedures and near-launch timelines
and staffing; and
an inspection of crew quarters at Johnson Space Center in Houston and
the Kennedy Space Center in Florida.
O'Connor interviewed almost 80 percent of active astronauts and all
current operational flight surgeons. None of them corroborated
allegations of preflight alcohol use or claims that management
disregarded flight surgeon concerns about alcohol impairment and
astronauts' fitness to fly.
"My review represents a good deal more investigation than normally
would be done in response to an anonymous safety concern," O'Connor
said. "As a result, I am confident there are enough safeguards in
place to prevent an impaired crewmember from being strapped into a
NASA is moving forward with a wide range of improvements based on
other recommendations from the Astronaut Health Care System Review
Working with members of the astronaut corps, NASA is developing a
formal astronaut code of conduct, or "Expected Astronaut Principles
of Behavior," which will be a document that outlines expectations.
The agency's medical managers also are studying how changes and
initiatives advocated by the committee would fit into NASA health
care procedures in a way that improves their effectiveness.
And NASA has accepted recommendations concerning the analysis and use
of behavioral health data to improve astronaut selection criteria.
NASA will convene expert working groups to advise the agency on
possible changes to its psychological testing. Additional training
for flight surgeons in behavioral health assessments is planned, and
evaluations will be added to annual flight physicals for all
astronauts. Continuity of care in NASA clinics will be evaluated. The
agency will ensure better clinical communication through regular
meetings between behavioral health providers and flight surgeons.
In addition, NASA plans to improve procedures and instructions used in
the administration of health care services for its behavioral health
clinic. Briefings by flight surgeons to crewmembers are being
re-emphasized to ensure astronauts fully understand the nature and
purpose of all health-related testing and data collection. Senior
NASA leaders also are holding meetings with flight surgeons and
astronauts to ensure they understand the multiple pathways to
communicate safety and health concerns.
To view O'Connor's report, along with a transcript and video of
Wednesday's news conference, visit:
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