January 2015 - AMSAT-BB - mailman.amsat.org

ISS
by graham mcphee 31 Jan '15

31 Jan '15

Pictures still coming down at 2300UTC Graham VK2AYE

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Received Images
by David Hopkins 31 Jan '15

31 Jan '15

I received two images a few minutes ago here on the east coast of Australia. There was a female voice in the background. She appeared to be giving location as I heard the word Australia several times. David David G. Hopkins (VK4ZF) CAPALABA QLD AUSTRALIA 27.32.38S 153.12.03E QG62OL Skype :- davhop

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Pair of Advanced Receiver Preamps for Sale
by Clayton Coleman 31 Jan '15

31 Jan '15

I am selling a pair of Advanced Receiver Research preamps. One is 2m and one is 70cm. Both are the mast-mount (outdoor) models. They will handle 160 watt of RF through their relays. Both units have been sent to Advanced Receiver Research after they were taken down for service and have not been used since. They were used with the RF choke installed so that you can power them via coax from your rig. I will also supply the original power connector so that you can remove the choke if you desire to power them separately. I do not have the original mounting hardware but you can source it locally with ease. MSP144VDG-160 is the 2m preamp and MSP432VDG-160 is the 70cm preamp. They sell for $259 new. I'm asking $357 for the pair, shipped anywhere in the continental US. I'm willing to ship them internationally but the price will be adjusted according to the destination. I will not separate the pair. Reply directly to this email and not to the BB, please. 73 Clayton W5PFG

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SSTV from ISS now operational
by M5AKA 31 Jan '15

31 Jan '15

Slow Scan TV from the ISS this weekend on 145.800 MHz FM next UK pass at 20:46 GMT http://amsat-uk.org/2015/01/29/iss-sstv-this-weekend/ You can receive it online via SUWS WebSDR near London http://amsat-uk.org/2014/09/06/iss-sstv-on-suws-websdr/ http://websdr.suws.org.uk/ ----Trevor M5AKAAMSAT-UKWebsite http://amsat-uk.org/Facebook https://www.facebook.com/amsatukTwitter https://twitter.com/AMSAT_UK----

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ISS - SSTV
by Roland Zurmely 31 Jan '15

31 Jan '15

18:49 UTC over Brazil:Very strong carrier, 3 mn ON, 3 mn OFF, and no SSTV modulation :-( 73 de Roland PY4ZBZ

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ISS pictures
by graham mcphee 31 Jan '15

31 Jan '15

Good quality pictures received here in VK at 2130 pass Graham VK2AYE

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Re: [amsat-bb] ISS - SSTV
by Roger Kolakowski 31 Jan '15

31 Jan '15

Just going over my recordings from yesterday and I have two women speaking in Italian, both sides of conversation, excellent radio procedure complete with " overs" on 145.800. As it acted like a Leo reception I assume it was specialist Samantha. Roger WA1KAT

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ISS - SSTV
by Raul Romero CA3SOC 31 Jan '15

31 Jan '15

https://www.dropbox.com/s/ro8iaokaw57sghj/1979644_10205117603757336_6680246… https://www.dropbox.com/s/d5gdj21rgc4qzmc/10885150_10205117604477354_452937… pass recorder in IPhone post decode mmsstv Copy Santiago CHILE FF46RJ TS-2000 Vertical Opek UVS-200 Raul CA3SOC

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R: Re: ISS - SSTV
by Claudio Ariotti, IK1SLD 31 Jan '15

31 Jan '15

Yes SSTV active with solid copy during 20:36 UTC pass. Two images sent PD180 mode. 73' Claudio IK1SLD Sent by Mobile DroidSimon Brown <simon(a)sdr-radio.com> ha scritto:AOS in SW England now, heard the last 3 seconds of SSTV, so transmissions are happening. Simon Brown G4ELI http://v2.sdr-radio.com -----Original Message----- From: amsat-bb-bounces(a)amsat.org [mailto:[email protected]] On Behalf Of Roland Zurmely Sent: 31 January 2015 18:56 To: AMSAT Subject: [amsat-bb] ISS - SSTV 18:49 UTC over Brazil:Very strong carrier, 3 mn ON, 3 mn OFF, and no SSTV modulation :-( 73 de Roland PY4ZBZ _______________________________________________ Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. 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(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. 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: [amsat-bb] Need help understanding inverting transponder
by Ronald G. Parsons 31 Jan '15

31 Jan '15

The way MacDoppler and SatPC32 handles Doppler shift is by keeping the frequency a constant on both the uplink and downlink AT THE SATELLITE. This is commonly called Full Doppler Tuning. As the satellite approaches you, the frequency you receive on the downlink is higher than the frequency at the satellite and decreases as the satellite passes the point of closest approach (when the Doppler shift is zero) and continues to decrease as the satellite approaches LOS. MacDoppler compensates for the Doppler shift in order to keep the frequency at the satellite a constant. This is advantageous as others can join the QSO and everyone will be at the same frequency at the satellite. It will appear to you that there is no Doppler shift -- the best method and easily accomplished by computer control. If you tune your receiver up or down, MacDoppler will compensate by tuning your transmitter down or up by the same amount, and then compensate for Doppler shift as above. Hope this helps. Ron W5RKN Message: 5 Date: Tue, 27 Jan 2015 18:29:42 -0500 From: Jacob Tennant <jakewf8s(a)gmail.com> To: AMSAT-BB <amsat-bb(a)amsat.org> Subject: [amsat-bb] Need help understanding inverting transponder operation Message-ID: <CAMM2CtW4axkair6JszYPaqXa7TEx=7V=wxF=3h8uVsHLo7iqMQ(a)mail.gmail.com> Content-Type: text/plain; charset=UTF-8 I am very new to satellite operations and I am running MacDoppler on my home Mac Mini computer and trying to get the modes setup as I am having a little trouble with how / where the program should be tuning my Yaesu FT857D. As I think I understand it for a inverting transponder (FO-29 for example), the downlink frequency range is 435.800 to 435.900 and that would be USB and the frequency would move lower as the pass happens starting at 435.900 and going down to wards 435.800. The uplink frequency range is 145.900 to 146.000 and that would be LSB and the frequency would move higher as the pass happens starting at 145.900 and going up to wards 146.000. Is this correct? Jake WF8S

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