February 2013 - AMSAT-BB - mailman.amsat.org

AMSAT-UK to provide ESEO satellite payload
by Trevor . 03 Feb '13

03 Feb '13

AMSAT-UK will be providing a 1260/145 MHz FM transponder and a 145 MHz BPSK telemetry beacon for the European Student Earth Orbiter (ESEO). See http://www.uk.amsat.org/?p=12487 73 Trevor M5AKA AMSAT-UK http://www.amsat-uk.org/ Join or Renew your AMSAT-UK membership at http://shop.amsat.org.uk/shop/category_7/Membership-of-AMSAT-UK.html ----

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Activating CO89,CO90 and CN99
by Nestor G Punales 03 Feb '13

03 Feb '13

Ezequiel VA7EZE will be activating CO90 and CN99 on SO-50 this Monday the 4th on his way to Vancouver, and on Tuesday the 5th he will be active on all the passes over CO89. If anyone need this grids Ezequiel would be happy to confirm all the contacts. For sure I will be there and I hope to hear a lot of you on the bird. 73 Nestor K6JTT DM22gt Sent from my iPhone

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PCSAT batteries!
by Robert Bruninga 02 Feb '13

02 Feb '13

>,what kind of battery is install on this kind of satellite? > how does it react in the cold space where it is? We placed the batteries in the middle of the satellite. It is quite immune to the +90C and -100C possible fluctuations on (unattached) solar panels (if they were not attached to the sides of the satellite). Since the solar panels are attached to the aluminum frame and the satellite rotates at about 1 RPM, we don't see any temperature variations even on the panels of more than about 10C (per orbit). And then these 10C fluctuations on the sides only penetrate to about a +/- 1 degree variation at the batteries per orbit and per day. Though there is a long term variation with the Sun/Orbit beta angle. The average temperature of PCsat is around 10C, getting as low as 0C during full eclipse seasons (High Beta angles) and as high as 40C for a weak or so when it is in full sun. This cycle moves over a 2 month or so cycle. Right now, PCsat inside is a nice comfortable 25C. Our problems with PCSAT (now 12 years old) is our own fatal flaw of designing it with a reboot-after-fault-detection mode of turning on backup transmitters and backup receivers to regain contact with the command station. Now with 20/20 hindsight, that was dumb... especially if the reason it faulted is due to low power! We can get in and turn off the extra XMTRS and RCVRS any time we want during high beta angles (maximum peak solar power available), but then there is only 15 minutes left before it goes back into eclipse and dies (not enough ttime to charge each orbit). But then 2 or 3 times a year, it enters full sun periods when, if we can get the command in, then we can send those commands to turn off all the spares and they will hold... BUT this time of full sun, is also the time of the worst sun angle (least average power), and so it is iffy if we can get the command in. See http://pcsat.aprs.org (raw packets at the bottom) and you will see that today's attempt resulted in achieving 9 minutes of operation before it died. See the telemetery serial numbers starting at 001 each time it resets. That occurred at 2013-02-02-14:29:24z Hope that helps Bob, Wb4aPR -----Original Message----- From: APRS(a)yahoogroups.com [mailto:[email protected]] On Behalf Of Gervais Fillion Sent: Saturday, February 02, 2013 9:53 AM To: aprs(a)yahoogroups.com Subject: RE: [APRS] QRT all PCSAT transmissions! Hi Bob,what kind of battery is install on this kind of satellite?i wonder how it react in the cold space where it is?Do you have any data that gave the temperature upthere?i am just curious,here in the Eastern part of Quebec we are used to have in the -20 celcius,,,,and battery are built for that,,how it is in space?? 73 Bob Thanks for all the info you are tellng us. Gervaisve2cknLe Bic,Quebec www.michelebard.com4823.73N/06839.65W To: APRS(a)yahoogroups.com From: wb4apr(a)amsat.org Date: Sat, 2 Feb 2013 08:20:00 -0500 Subject: RE: [APRS] QRT all PCSAT transmissions! > Question: PCSAT,does it transmit at 144.390 like other APRS hardware ? No and yes. It operates up and down on 145.825 like all other APRS satellites. But it also has a backup transmitter on 144.39 which we can use as a national broadcast downlink. Problem is, most people cannot hear it due to local QRM on 144.39... but it is there. If you live in the boonies and there is no other local traffic, sometimes you can pick it up. But there is no UPLINK there for obvious reasons. Even in congested areas, sometimes you can receive it on 144.39 if there is a moment of silence when it transmits. In fact, it was that clever idea that kills PCSAT on every orbit. The old batteries do not have enough power to power both XMTRS at the same time which is what it is trying to do. We can send the command to turn off the other XMTR, but then on the next eclipse, it resets back to BOTH ON. Darn... Bob, WB4APR [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/APRS/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/APRS/join (Yahoo! ID required) <*> To change settings via email: APRS-digest(a)yahoogroups.com APRS-fullfeatured(a)yahoogroups.com <*> To unsubscribe from this group, send an email to: APRS-unsubscribe(a)yahoogroups.com <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/

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AMSAT-US Web Site
by Clint Bradford 02 Feb '13

02 Feb '13

I am working on a publishing deadline. Confirming that "AMSAT.org" will continue to be the domain name for AMSAT-NA's official site - is that correct? Clint K6LCS Sent from my iPod touch.

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Re: CubeSats on Arirang TV
by Trevor . 01 Feb '13

01 Feb '13

I'll put it on the AMSAT-UK site. I take it we are talking about the attached picture which occurs 5 seconds into the video ? 73 Trevor M5AKA --- On Fri, 1/2/13, g0mrf <g0mrf(a)aim.com> wrote: From: g0mrf <g0mrf(a)aim.com> Subject: Re: [amsat-bb] Re: CubeSats on Arirang TV To: "Graham Shirville" <g.shirville(a)btinternet.com>, "Trevor ." <m5aka(a)yahoo.co.uk>, amsat-bb(a)amsat.org Date: Friday, 1 February, 2013, 17:48 You're good Graham. I had to freeze frame the video.....but then you can see the callsign PA3WEG on the masking tape. 73 David In a message dated 31/01/2013 GMT Standard Time, g.shirville(a)btinternet.com writes: #yiv380802057 .yiv380802057aolmailheader {font-size:8pt;color:black;font-family:Arial;} #yiv380802057 a.yiv380802057aolmailheader:link {color:blue;text-decoration:underline;font-weight:normal;} #yiv380802057 a.yiv380802057aolmailheader:visited {color:magenta;text-decoration:underline;font-weight:normal;} #yiv380802057 a.yiv380802057aolmailheader:active {color:blue;text-decoration:underline;font-weight:normal;} #yiv380802057 a.yiv380802057aolmailheader:hover {color:blue;text-decoration:underline;font-weight:normal;} The more eagle-eyed amongst us have spotted that about 9 seconds into this video it includes shots of the FUNcube-1 engineering model stack, with a antenna deployment simulator attached to it, obviously taken recently but I have absolutely no idea how they came by it:) 73 Graham G3VZV -----Original Message----- From: Trevor . Sent: Thursday, January 31, 2013 10:03 PM To: amsat-bb(a)amsat.org Subject: [amsat-bb] CubeSats on Arirang TV Korean TV station Arirang broadcast this English language news item about CubeSats: http://www.youtube.com/watch?v=sfZRDS6-D-o 73 Trevor M5AKA ---- _______________________________________________ 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 ________________________ _______________________ 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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CubeSats on Arirang TV
by Trevor . 01 Feb '13

01 Feb '13

Korean TV station Arirang broadcast this English language news item about CubeSats: http://www.youtube.com/watch?v=sfZRDS6-D-o 73 Trevor M5AKA ----

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Miami Hamfest Operation
by John Papay 01 Feb '13

01 Feb '13

John K8YSE and Bill KD4FRB will be hosting an AMSAT table at the Miami Hamfest on Saturday February 2nd. We will try to operate a demo station on high elevation ssb and FM passes and also on my home station over the internet. Would appreciate contacts. 73, John K8YSE

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FL05/FL06 Operation 3Feb2013
by John Papay 01 Feb '13

01 Feb '13

There is a possibility of operating on 2 Sunday morning passes from wet grid squares FL05 and FL06. Weather permitting I will be on VO-52 at 1253utc from FL-05 and on FO-29 at 1427 and 1611utc from FL06. Hope to work you. Send an email if you want a qsl card for your contact. 73, John K8YSE

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Intelsat-27 Launch Failure
by Alan 01 Feb '13

01 Feb '13

Boeing lost its most recent satellite today: http://www.space-travel.com/reports/Russia-launched_satellite_plunges_into_P acific_official_999.html 73s, Alan WA4SCA

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SpEx Shadow Australian time table inc. orbit numbers.
by Kevin Forbes 01 Feb '13

01 Feb '13

David VK4zF made a nice suggestion, orbit numbers, to avoid time zone terminology confusion. Here is the updated timetable. Please remember, in order to participate in the experimentand be eligible for a QSL, you must be registered with the principal investigator. http://knts.tsniimash.ru/Shadow/en/Registration.aspx The original document sent to me by Valentin is available at this page, http://www.terranimpact.com/site/space/space.php direct link http://www.terranimpact.com/site/space/fun.doc Australian measuring field Available orbits Master stations vk6mj, vk3ukf Date Beginning of a measuring orbit, UTC 02-02-2013 UTC 01:00 UTC = 12 midday Canberra(EST) = 11.30 A.M. Adelaide(CST) = 10.30 A.M. Darwin(CST) = 9.00 A.M. Perth(WST) Master Station VK6MJ / ORBIT 81371 + 51 minutes 05:59 UTC = 4.59 P.M.Canberra(EST) = 4.29 P.M. Adelaide(CST) = 3.29 P.M. Darwin(CST) = 1.59 P.M. Perth(WST) Master Station VK3UKF / ORBIT 81374 + 72 minutes 07:33 UTC = 6.33 P.M.Canberra(EST) = 6.03 P.M. Adelaide(CST) = 5.03 P.M. Darwin(CST) = 3.33 P.M. Perth(WST) Master Station VK3UKF / ORBIT 81375 + 73 minutes 03-02-2013 00:10 UTC = 11.10 A.M.Canberra(EST) = 10.40 A.M. Adelaide(CST) = 9.40 A.M.Darwin(CST)= 8.10 A.M.Perth(WST) Master Station VK6MJ / ORBIT 81386 + 51 minutes 01:45 UTC = 12.45 P.M.Canberra(EST) = 12.15 A.M. Adelaide(CST) = 11.15 A.M.Darwin(CST)= 9.45 A.M.Perth(WST) Master Station VK6MJ / ORBIT 81387 + 53 minutes 06:42 UTC = 5.42 P.M.Canberra(EST) = 5.12 P.M. Adelaide(CST) = 4.12 P.M.Darwin(CST)= 2.42 P.M.Perth(WST) Master Station VK3UKF / ORBIT 81390 + 72 minutes 08:17 UTC = 7.17 P.M.Canberra(EST) = 6.47 P.M. Adelaide(CST) = 5.47 P.M.Darwin(CST)= 4.17 P.M.Perth(WST) Master Station VK6MJ / ORBIT 81391 + 74 minutes

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