Hi Armando, N8IGJ
I agree with you.
Between 1997 or early 1998 OSCAR-10 was operating with low level signals in 2 meters, downlink Mode-B, while OSCAR-13 was already died.
If John, AA5JG is sure about the epock of his reception back in late 1997 or early 1998 I guess that probably he was hearing or OSCAR-10 or better RS-12 a powerful LEO satellite in Mode-T with uplink in 15 meters and downlink in 2 meters exactly from 145.910 MHz to 145.950 MHz
At that time 23 april 1996 OSCAR-10 was still operational in Mode-B because I have the QSL card received from i8KRO for a QSO made with him through two satellites OSCAR-10 and RS-12
The uplink on RS-12 for i8KRO was in 21 MHz and the uplink for me on OSCAR-10 was in 435 MHz while the downlink for both of us was in 145 MHz
RS-12 was funny because one evenig I was tuning 2 meters waiting for the AOS of OSCAR-10 when a very strong italian station in North of Italy comes on speaking in spanish with a station in South America, thing impossible to be heard on two meters because OSCAR-10 was still belove my horizon.
A quick investigation discovered that both stations where transmitting in 15 meters between 21.210 and 21.250 MHz and RS-12 was overhead to me in Europe so their signals were translated by RS-12 but most interesting the South American station was able to get into RS-12 by virtue of the ionospheric propagation so that I was able to receive both of them through RS-12 while the South American station was weaker and affected by a very fast QSB
Nice to remember the RS satellites !
73" de
i8CVS Domenico
----- Original Message ----- From: "Armando Mercado" am25544@triton.net To: amsat-bb@amsat.org Sent: Monday, December 05, 2011 3:49 PM Subject: [amsat-bb] Re: HEO history question
Hi John,
The UK and the mid-west were mutually visible in the morning almost the entire month of November, 1997, via AO-10. There was a gap for a couple of weeks in December, 1997, but mutual visibility returned for the 2nd half of January 1998 into Feburary 1998.
RS12/13 made morning passes visible to the mid-west roughly every other week starting October, 1997 to March of 1998. (didn't calculate passes beyond that)
However, if you were tuning around in the FM mode and found an SSB signal loud enough to get your attention, I think you probably heard RS12/13.
Do you remember how long you heard the signal? (a couple of minutes or a half an hour or more). Was the signal strength steady or was there a slow deep QSB?
73, Armando, N8IGJ
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Date: Fri, 2 Dec 2011 13:58:52 -0600 From: John Geiger aa5jg@fidmail.com To: AMSAT-BB amsat-bb@amsat.org Subject: [amsat-bb] HEO history question Message-ID: CAFq43LZDtAvUcUDYzFtYxe4kG0XBQK_iaGNKkR6KE0tB=H1mYw@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1
Back in late 1997 or early 1998 I was using a Kenwood TR9130 on 2m SSB. One morning I was tuning from the FM to the SSB portion of the band, and heard a station just below 146mhz. I tuned them in, and it was a station from Wales! Obviously going thru a satellite as the 2 meter conditions weren't that good that morning. I am now wondering what satellite it probably was. Hearing it was enough to motivate me to eventually get into satellite operations-that took a few years though.
Anyways, what satellite was I probably hearing? I am guessing AO10 or
AO13
but were they operational at that time?
73s John AA5JG
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