In order for you to receive these polar orbital satellites you need to
know when they are within line of sight of your receiver antenna.This is
because the frequency of 137 MHz is line of sight reception only.
Other programs can be
received from the Internet in any case you need
updated information on the satellite orbits.
Because the polar orbital satellites are in low earth orbit they are
constantly being slowed by the remanants of the earth's atmosphere at
there operating altitude. Thus satellite orbital information needs to be
updated at least monthly in order to satisfactorly predict the satellites orbit.
There are several sources where you can get the
satellite orbital elements information. Your first choice should be the firm from which
you obtained your program since they will have the information in the proper
format for your predictor program.
The source on the Internet that is the most comprehensive is maintained at
There are several satellite predictor programs available some are built into
the reception programs available from the manufacturers see the
Biblography.
Dr. T.S. Kelso's site
this source is updated frequently.
RETURN TO MAIN PAGE