November 2009 - AMSAT-BB - mailman.amsat.org

no amateur radio payload but this is going to be
by Rocky Jones 10 Nov '09

10 Nov '09

http://www.spaceflightnow.com/news/n0911/10solarsails/ neat visually...wonder if the telemetry is in the ham bands? Robert WB5MZO _________________________________________________________________ Windows 7: Unclutter your desktop. http://go.microsoft.com/?linkid=9690331&ocid=PID24727::T:WLMTAGL:ON:WL:en-U…

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The Yaesu rotators have sold.
by John Hansen 10 Nov '09

10 Nov '09

Thanks for all the inquiries. John W2FS

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digital voice webpage
by Bruce Robertson 10 Nov '09

10 Nov '09

I don't believe that this web-page has been noted on amsat-bb http://codec2.org/ Besides pointing out some serious problems with using the proprietary codec that is currently built into DStar, it has the great idea of hacking out the digital voice daughterboard in an ICOM DSTAR radio and plopping in a replacement that implements a free codec. I wonder how complicated it would be to integrate a digital repeater a SDX linear transponder bandpass to operate as a suitable digital voice channel or two. If the SDX on board nextgen will be programmable on the fly, it's something we could work on on the ground and try in flight later on. 73, Bruce http://ve9qrp.blogspot.com

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Out of the Office
by Martha 10 Nov '09

10 Nov '09

I will be out of the office on Wednesday, November 11th (Veterans' Day) and Thursday, November 12th. I will be on Friday. Office hours are 10:00AM ET - 6:00 PM ET. -- 73- Martha

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Re: ultimatecharger website
by Rodney Waln 10 Nov '09

10 Nov '09

hi, this is the best we can do, it has been shut down for what ever reason, but all the pages can be view here as well as other places on the web, http://web.archive.org/web/*/ultimatecharger.com Rodney kc0zhf

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Re: Android/g-phone satellite tracking application
by David Johnson 10 Nov '09

10 Nov '09

Hi, My Java source is a port of the original Predic C source and I honored the GPLv2 that John Magliacane used for that. It's been changed since then to increase performance when doing predictions for multiple sats over a one day schedule, for multiple gound-stations, as we need in Genso. - Dave Jonathan Guthrie wrote: > On Fri, 2009-11-06 at 15:07 +0000, David Johnson wrote: >> Hi, >> >> I'm just writing an IARU Locator App at the moment. Once I've done that, >> I'll have the gound-station location sorted. >> >> I've already ported Predict SGP-4/SDP-4 to Java (in use by Genso) so I >> think the next step should be relatively straightforward. >> >> You can check-out the code for the algorithm using subversion from: >> >> http://sourceforge.net/projects/websat/develop >> >> Please note that it is licensed under GPLv2. >> >> 73 >> >> Dave >> G4DPZ > > > It's just my luck that the parts I like to work on are the parts that > lots of other people like to work on, and are the same parts that are > portable and easily encapsulated. > > I'm not that fond of the GPL, but I'll look into using your code instead > of porting my own. Of course, that assumes that I ever actually do more > about it than just talk. > > 73's and I hope fortune smiles upon you. > >

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SatMag - Thoughts On Satellite Filings
by Trevor . 10 Nov '09

10 Nov '09

The November issue of the free SatMagazine has an article titled 'Thoughts On Satellite Filings' written by the husband of US astronaut Nicole Stott, KE5GJN. Chris Stott is CEO of ManSat LLC and the Isle of Man’s Honorary Representative to the Space Industry. SatMagazine also has an article on on Space Security which touches on ITAR. It can be downloaded from http://www.satmagazine.com/2009/SatMag_Nov09.pdf 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ ----

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Yaesu 5400B Az-El Rotators for Sale
by John Hansen 10 Nov '09

10 Nov '09

A set of Yaesu 5400B Az-El Rotators for Sale. Tested yesterday and found to work FB. There is a place in the vicinity of West where the indicator needle fluctuates as the rotator turns. This is probably the result of a dirty pot. The package includes a custom made heavy duty L bracket with side supports(this one won't bend!). Manual included. Pictures are available at: www.johnahansen.com $225 plus shipping from 14063. John W2FS

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ultimatecharger website
by Pete Norris, K1HZU 10 Nov '09

10 Nov '09

Does W0LMD still maintain the "ultimatecharger" website, or has it been changed? I have been on this website in the past, but I can no longer bring it up. Thanks, Pete, K1HZU

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Linear transponder versus FM transponder for LEO satellites
by OZ1MY 10 Nov '09

10 Nov '09

Hi, The e-mail from I8CVS brings the issue up again. Why not just be happy to get one more transponder for us to use ? If you do not want to use a FM transponder so that be it. It is interesting to note that there are far more operators on the FM transponder satellites than on the linear satellites in Low Earth Orbit. Anyway the choice is made by the ones who make and finance the satellites and transponders. With a height of 500 km FM is probably the way to go. The dopper shift is large. It may be a bad choice for a linear transponder unless you assume that everyone are using full doppler tracking :-) Sumbandilasat it a very good satellite for operators working portable or mobile. The downlink is strong and it will be better to use it once things settle down. Every time we have a new satellite we have very many wanting to try it out. I think we should say thank you to our friends in SA for a new one. 73 OZ1MY Ib

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