August 2011 - AMSAT-BB - mailman.amsat.org

ARISSat TLM soundcard selection ?
by PA3GUO 07 Aug '11

07 Aug '11

Case: Using ARISSatTLM with the output of HDSDR (connected to FCD SDR). - using Win XP (by luck ?) ARISSatTLM selects the decoded output of HDSDR (volume of HDSDR varies the input level of the ARISSTLM window) - using Win7 64bit ARISSatTLM seems to select another input (unclear which) How can I select which sound card ARISSatTLM should use ? Henk, PA3GUO

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Transponder 1412Z
by Rsoifer＠aol.com 07 Aug '11

07 Aug '11

I heard myself calling CQ for about 2 minutes, peaking 569, but no takers that I could hear. Then, about 2 minutes later, I heard AA5PK calling CQ, about the same strength, but I could no longer hear myself. It's a challenge! 73 Ray W2RS

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ARISSat-1 possible critical height
by Giulio P. AOL 07 Aug '11

07 Aug '11

Hi, what could be the critical height (closest to the earth) for the satellite, where the temperatures will degrade the operation? thanks Giulio AB2VY

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Re: Transponder 1412Z
by Rsoifer＠aol.com 07 Aug '11

07 Aug '11

Hi Glenn, I haven't made a QSO yet either. The biggest problem, I think, is the satellite's tumbling, which results in frequent obstruction of the little uplink antenna by the main body of the spacecraft. On this pass, when I could see the uplink antenna, you couldn't, and vice versa. The rapid Doppler, due to the low altitude, doesn't help either. I'll try again tomorrow morning. 73 Ray In a message dated 8/7/2011 2:42:54 P.M. GMT Standard Time, aa5pk(a)suddenlink.net writes: I wish I'd heard you calling, Ray. Still trying to make my first contact through ARISSat, The QSB is a killer. 73 Glenn AA5PK ----- Original Message ----- From: <Rsoifer(a)aol.com> To: <amsat-bb(a)amsat.org> Sent: Sunday, August 07, 2011 9:25 AM Subject: [amsat-bb] Transponder 1412Z >I heard myself calling CQ for about 2 minutes, peaking 569, but no takers > that I could hear. Then, about 2 minutes later, I heard AA5PK calling CQ, > about the same strength, but I could no longer hear myself. > > It's a challenge! > > 73 Ray W2RS > _______________________________________________ > 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

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Re: ARISSat-1 possible critical height
by Mike Schaffer 07 Aug '11

07 Aug '11

Question: Hi, what could be the critical height (closest to the earth) for the satellite, where the temperatures will degrade the operation? thanks Giulio AB2VY ---------- Answer: Giulio: The Karman line lies at an altitude of 62 miles above the Earth's sea level, and is commonly used to define the boundary between the Earth's atmosphere and outer space. Mike Schaffer KA3JAW Tampa, Florida EL86SU

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ISS Packets QRM ARISSat-1 - Update 1
by Mike Schaffer 07 Aug '11

07 Aug '11

I misstated the UTC time in the original message. It should have been 0423 - 0443, which is 12:23 - 12:43 am local EDT. On the latest pass, August 7, 1243 - 1247 UTC ISS packets are still coming through the 2M downlink on 145.950 FM interfering with reception of the SSTV and voice transmissions. Two packet signals occurred while over the U.S.A. and one while south of Pinar del Rio, Cuba. Mike Schaffer KA3JAW Tampa, Florida EL87SU

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QSO on Radioscaf-B !
by Roland Zurmely 07 Aug '11

07 Aug '11

QSO with Luciano PY5LF at 13:00 UTC orbit #50 ! TNX es 73 de Roland PY4ZBZ.

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ARRISat-1 SSB QSO
by Clare Fowler 07 Aug '11

07 Aug '11

At 11:08 UTC Aug 7 morning pass with 20 degree elevation VE3NPC and KB8OTH competed a QSO on ARRISat-1. Signals were just above noise level but Q5 Clare VE3NPC

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Re: ARISSatTLM
by Phil Karn 07 Aug '11

07 Aug '11

On 8/7/11 5:59 AM, N0JY wrote: > Phil, > > My Windows 7 PC with Realtek onboard sound set at 48kHz seems quite > happy, having captured and forwarded 155 frames while I slumbered... > So one final, please tell me what you think about the tuning (see Well, you can't argue with success! Phil

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Keps
by Nigel A. Gunn, W8IFF/G8IFF 07 Aug '11

07 Aug '11

RADIOSCAF-B 1 37772U 98067CK 11218.86259259 .00021723 00000-0 26232-3 0 78 2 37772 051.6391 265.6719 0013091 053.4833 294.0582 15.60578441 392

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