The frequencies given for each of the easy satellites are:
AO-27 436.795 SO-50 436.795 AO-51 435.300
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. http://www.amsat.org/amsat-new/satellites/status.php
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.
John Kopala N7JK
Date: Sun, 9 Sep 2007 19:44:15 -0700 (PDT) From: Bob Stewart [email protected] Subject: [amsat-bb] FM sat frequencies? To: Amsat-BB [email protected] Message-ID: [email protected] 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