April 2007 - AMSAT-BB - mailman.amsat.org

Call for Papers--2007 ARRL/TAPR Digital Communications Conference
by Ford, Steve, WB8IMY 16 Jul '12

16 Jul '12

Technical papers are solicited for presentation at the 26th Annual ARRL and TAPR Digital Communications Conference to be held September 28-30, 2007 in Hartford, Connecticut. These papers will also be published in the Conference Proceedings (you do NOT need to attend the conference to have your paper included in the Proceedings). The submission deadline is July 31, 2007. Please send papers to: Maty Weinberg ARRL 225 Main St Newington, CT 06111 or you can make your submission via e-mail to: maty(a)arrl.org Papers will be published exactly as submitted and authors will retain all rights. 73 . . . Steve, WB8IMY ARRL

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Re: Planning
by Grant Hodgson 01 May '07

01 May '07

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

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Re: The need for telemetry data -or what happened to FO-29-
by Douglas Quagliana 30 Apr '07

30 Apr '07

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

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fo-29 tidbit
by Patrick McGrane 30 Apr '07

30 Apr '07

Greetings- just a possible lead regarding fo-29 I noticed today fo-29 and ao-27 are crossing paths lately very close. Is it possible ao-27 output is affecting fo-29 input? Please excuse the simple post. Just thought it might mean something. Sorry if its stupid, take care, pat n2oeq

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AMSAT/TAPR Banquet tickets
by Gould Smith 30 Apr '07

30 Apr '07

Hello All, Just a reminder that there are only two weeks left to purchase your tickets to the Dayton AMSAT/TAPR Banquet Friday, May 18,2007. The "Under the Wings" Banquet will be held in the Air Force Museum. Ticket reservations can be made online at the AMSAT Store, follow the link from the front page of the amsat.org web site. Reserved tickets will be available for pickup at the AMSAT booth (#444-448) all day Friday, and at the Museum. Reserved tickets can only be purchased until end of business Monday, May 14, 2007 (two weeks from today). We must give the museum a final count on Tuesday morning. There will be no ticket sales at either the AMSAT or TAPR booth Friday, this is different than past years. Get online and make your reservations now for a great meal, great ambiance and great kinship. Don't be left out of THE Friday night event. 73, Gould, WA4SXM

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CP-4 telemetry Apr 30, 2007
by Mike Rupprecht 30 Apr '07

30 Apr '07

All, 21:13UTC 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: 115 from N6CP to N6CP: 1 > 01 E7 25 0D 03 3B D4 02 07 04 5A A5 C9 D3 C0 CC 05 00 03 7A 21 > C1 C5 BE C2 CA 2D 38 09 AA 2A AF B4 BD 98 03 02 04 8A 4C F3 41 > E8 C5 95 00 00 03 70 95 F9 FC C0 00 05 B8 A4 B8 B9 A9 10 12 61 > 0B 0A 03 01 75 87 87 B9 B9 83 C7 69 F4 F1 FF D6 EB 83 C7 69 81 > F5 F5 FF 1D ED 03 01 00 00 66 26 08 5C 01 25 2A 2C 5C A7 ____________________________________________________________________________ ____ 2118 UTC ctrl: 3 {UI} PID: F0 {No L3} Total Frame Bytes: 23 from N6CP to N6CP: 1 > 04 43 4F 4D 4D 20 41 .COMM A ____________________________________________________________________________ ____ ctrl: 3 {UI} PID: F0 {No L3} Total Frame Bytes: 115 from N6CP to N6CP: 1 > 01 E9 25 0D 07 3A CB 02 07 03 55 9B 81 8F C0 9F 02 00 02 85 21 > B1 68 67 C2 C2 7E 62 09 B5 22 76 7B BE B5 03 03 04 96 52 F7 41 > E9 C5 9A 00 00 03 77 99 DB DE C0 00 05 B8 A4 B8 B8 AF 10 10 61 > 0C 04 0B 01 7A 8C 8A B9 BA 83 C7 6C F3 5B 00 D9 EB 83 C7 6C 81 > F3 4F 00 1F ED 03 01 00 00 26 26 08 68 01 27 4F 2A 5C EA 73, Mike DK3WN

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TS-790A
by John DiStefano 30 Apr '07

30 Apr '07

I just tried it and it will in fact do 1240 - 1300 as the manual states. 73, John KE3SU

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Libertad-1
by Mike Rupprecht 30 Apr '07

30 Apr '07

All, Libertad-1 telemetry Apr 30, 2007 at 21:56 UTC fm 5K3L to 5K3USA via BEACON ctl UI^ pid F0: A00O23C23I23P22R-5_LIBERTAD_1COL_B:191AA 73, Mike DK3WN

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Telemetry Reception Thoughts
by Steve Raas 30 Apr '07

30 Apr '07

I think that the reception of telemetry is a necessary duty. Saying that.. being new to sats.. a lot of this is all greek to me.. yet Im willing to learn and provide reception of telemetry. I do have digital mode capability, however.. Ive never set it up right. My set up is as follows: Icom IC 820H 2m/70cm all mode 2m Yagi - 5 element 70cm - 11 element Antennas are AZ/El movable as well PC Interface - Rigblaster Plug n Play USB I've received some GPRS stuff a while back.. but it dident do much for me looking @ a map telling me where people were. However receiving sat data for the good of the sat seems well worth doing to me. I have been fairly active on the analog sats and have no problems receiving them. So with all that being said.I volunteer to RX and record some telem data. Tell me what sat .. and be prepaired for lots of questions. I sit here frequently wishing I had sompthing constructive to do. -Steve Raas N2JDQ FN20vg

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TS-790A
by Stargate 30 Apr '07

30 Apr '07

Hi all, Will the UT-10 1.2ghz module for the TS-790A tune to the 1260-1270 satellite band? I only found one reference on Google but wanted confirmation from someone that actually has one. I might have the chance to trade an Icom IC-706MK2G for a TS-790 w/UT-10 and was wondering if it would be a good deal. Thanks, RoD KD0XX A good friend will come and bail you out of jail, A TRUE friend will be sitting next to you saying..... "DAMN THAT WAS FUN"

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