[amsat-bb] Re: FM sat frequencies?
jkopala at gmail.com
Mon Sep 10 10:40:49 PDT 2007
The frequencies given for each of the easy satellites are:
AMSAT gives the details for the individual satellites and their uplink and
downlink frequencies. Go to the following site and then simply click on the
satellite you are interested in.
With doppler shifts as the satellites make a pass the actual receive
frequency could vary by as much as about 10 KHz plus or minus the nominal
frequency. The only time you would ever receive the satellite exactly on
its downlink frequency would be when the satellite heading is exactly 90
degrees from your bearing to the satellite. At that point the satellite is
tangential to a circle whose center is your location and is neither moving
toward or away from your location.
I am using an IC-910H. For manual tuning at the beginning of a pass, I
simply tune about 5 to 9 KHz higher (depending on the elevation of the pass)
than the nominal frequency. With the AFC turned on, the radio will
automtically lock into the signal when it becomes strong enough and track
the frequency as the doppler shift changes the receiving frequency during
the pass. At loss of signal, the receive frequency will be below the
nominal frequency by about the same amount it was above at the start.
> Date: Sun, 9 Sep 2007 19:44:15 -0700 (PDT)
> From: Bob Stewart <bob at evoria.net>
> Subject: [amsat-bb] FM sat frequencies?
> To: Amsat-BB <amsat-bb at amsat.org>
> Message-ID: <869490.76831.qm at web909.biz.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
> Does anyone know the actual downlink frequencies of the
> easy sats? From messing around with my hack for gpredict,
> I get the values below, but it would be nice to know the
> correct values as a check against what I'm doing.
> AO-27 436.7972
> SO-50 436.7920
> AO-51 435.3008
> Bob - AE6RV
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