AMSAT-BB May 2007

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FO-29

by ALVARO GAVIRIA

The FO-29 over Colombia Max El 82º, nothing copied 73 HK4MKE

15 years, 7 months

CP4 decoded completely

by Mineo Wakita

ctrl: 3 {UI} PID: F0 {No L3} Total Frame Bytes: 23 from N6CP to N6CP: 1 > 04 43 4F 4D 4D 20 42 .COMM B -------------------------------------------------------------------- ctrl: 3 {UI} PID: F0 {No L3} Total Frame Bytes: 116 from N6CP to N6CP: 1 > 01 B5 20 10 36 22 B4 02 06 03 57 A2 4B 54 C0 C2 19 18 02 02 21 > 7E BB 61 5F C2 BA 04 03 08 9E 26 52 59 BD C1 41 31 03 8C 54 41 > 1F 1B C5 BD 11 0E 02 68 8D 3D 3D C0 00 05 B8 5C B8 B8 B9 11 61 > 0F 0B 09 03 01 65 73 70 B9 B9 8B C7 6A Tnx. DK3WN, Mike Rupprecht See more, http://www.ne.jp/asahi/hamradio/je9pel/cp4decod.htm http://www.ne.jp/asahi/hamradio/je9pel/cp4deco2.htm de JE9PEL, Mineo Wakita

15 years, 7 months

Re: Planning

by Grant Hodgson

MKM wrote :- >We need new IF-DSP V/H/SHF radios with built in band scopes and >modules up to 5GHZ. and Ed wrote :- >The solution is to use a SDR on the IF of your current radio. Then >software can provide DSP, filtering, spectral and waterfall displays, >decoding...etc. >I am testing the SDR-IQ using the 28-30 MHz output of the DEMI 144/28 >converter. 144-MHz is very commonly used IF for microwave converters. A more modern approach would be to use an SDR at the RF frequency, with direct conversion to baseband, thus eliminating the transverter altogether. This is what the uWSDR (Microwave SDR) project is doing. In a nutshell - using the latest components and modern circuit topologies to realise a high-performance SDR operating at microwave frequencies. The first products will be for the 2.3GHz (which includes 2.4GHz) band and a sister product for 144MHz. The software for the user interface is new; the software for the low-level DSP is the same as used on SDR-1000 and other SDRs. More details can be found on the uWSDR website :- uwsdr.berlios.de and there is a Yahoo group for the developers and lurkers. ON/G4KLX will give a remote presentation via the web at Dayton, and I might be able to give a talk in person at Microwave Update. There are umpteen possibilities for product options for satellite use, such as a 2.4GHz only Rx, a crossband 1.3GHz Tx/2.4GHz Rx, etc. etc. Development progress has been painfully slow; if anybody would like to help with the design and development please contact one of the team. 73 Grant G8UBN for the uWSDR team

15 years, 7 months

Re: The need for telemetry data -or what happened to FO-29-

by Douglas Quagliana

stefan_wagener(a)hotmail.com wrote: > One key > component of failure analysis is the availability of data, especially > telemetry. > [snip] > My question is, can the satellite user community at large come up with a > system that allows the routine capturing of satellite telemetry? Is > there a role that AMSAT can play? What would it take? > > Thoughts are appreciated. > Hi, Here's my thoughts... I would like to see a system put in place that is similar to the one that was up and running while AO-40 was alive. That is, multiple groundstations around the world could receive the telemetry using whatever modem they used and forward that telemetry over the Internet (in either realtime or via email) to a central site which both archives and disseminates the telemetry to other groundstations. The archives were (and still are) publicly available on AMSAT web/ftp site at http://www.amsat.org/amsat/ftp/telemetry/ao40 I suppose if we asked the right people we could easily get hard drive space on that server to start archiving telemetry from other satellites. A very nice side effect of the collection efforts was that you could point your telemetry display program (which was not necessarily the same as the program that collected the telemetry and sent it to the server) at the telemetry server and the server would send current live telemetry to you as others sent their telemetry in to the server. In this way you could watch ("Live!") the progress of the satellite even when it was on the other side of the world and even if you yourself lacked the radios and/or modems. This was a lot of fun. By a curious coincidence, I have been working on a 9600 baud soundcard demodulator for Echo along with a telemetry display program and an Internet telemetry reflector. Ok, who wants to help? Douglas KA2UPW/5

15 years, 7 months

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AMSAT-BB May 2007