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W4DPH > SAT 12.12.02 21:36l 54 Lines 2307 Bytes #999 (0) @ AMSAT
BID : ANS-342.03
Read: DO1NRJ DB0FHN GUEST
Subj: RS-20 IS HEARD FOR THE FIRST TIME
Path: DB0FHN<DB0ZWI<DB0HOT<DB0LPZ<DB0ERF<DB0FBB<DB0GOS<ON0AR<ON0AR<WB0TAX<
W4DPH
Sent: 021208/0110Z @:W4DPH.#TPA.FL.USA.NOAM #:35955 [CLW] FBB $:ANS-342.03
From: W4DPH@W4DPH.#TPA.FL.USA.NOAM
To : SAT@AMSAT
AMSAT News Service Bulletin 342.03 From AMSAT HQ
SILVER SPRING, MD. DECEMBER 8, 2002
To All RADIO AMATEURS
BID: $ANS-342.03
Last week it was announced that the Russian launch of their Mozhaetz
satellite also carried the RS-20 payload. The downlink frequencies were
listed as 435.319 MHz and 145.828 MHz. The initial report of the launch
indicated that CW telemetry could be heard on these downlinks. Not much
was heard from RS-20 for the first couple of days. Then signal reports
began to appear from around the world.
Mineo Wakita JE9PEL reported:
I heard good CW signal of RS-20 by using ALSAT-1 keps
on 435.3185MHz +/- doppler, every approximately 15 second,
at 23:09:00-23:22:00 UTC, 1 Dec 2002. Recordings of RS-20 are at:
wav 2322 KB http://www.ne.jp/asahi/hamradio/je9pel/21202r20.wav
mp3 527 KB http://www.ne.jp/asahi/hamradio/je9pel/21202r20.mp3
Don Woodward KD4APP reported:
I just heard RS-20 at 0214 UTC (Tuesday December 3, 2002) on a very low
pass (maximum 3 degrees). It was very loud. Sounded like random CW - I have
posted a MP3 file on my satellite sounds page on my website.
http://kd4app.webhop.org
Ib Christoffersen OZ1MY reported:
During this pass with AOS at 2014 UTC on 1 December, the new Russian
satellite was heard again. Again this time on 70 cm (435.319 MHz). The
downlink signal looked like telemetry - but I can not read that. The
satellite was in easy reach of Moscow. Therefore I think they were
uplinking and downlinking to/from the satellite. The keps for Alsat-1
seems to be correct for the new one (Mozhayets).
Discovering an additional mode besides the announced CW telemetry, some
thought that the new telemetry on the Russian Mozhaetz satellite sounded
like two tone FSK, 1200 and 2400 hertz. Howard G6LVB thought that the
MixW2 software could be used to decode the FSK signal. He suggested to
try the following:
1. First set to RTTY mode and check that it works OK.
2. In the Mode -> Mode Settings menu.
a. Set the RX frequency to 1800;
b. Over-key the Shift to 1200;
c. Over-key the baud rate to 1200 or 300 as appropriate;
d. Set the Charset to ASCII8;
e. You may or may not find the Inverted bit might be needed.
[ANS thanks everyone for their RS-20 information.]
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