DELFI-OSCAR 64 (DELFI-C³) On the 28th of April 2008 at 03:53 UTC the Delfi-C3 was succesfully launched with a PSLV launch vehicle. At 06:45 UTC the first signal was received by a radio amateur in California. At 11:55 UTC the … Continue reading →

A two-line element set (TLE) is a set of orbital elements that describe the orbit of an earth satellite. A computer program called a model can use the TLE to compute the precise position of a satellite at a particular … Continue reading →

Earth-Moon-Earth, also known as moon bounce, is a radio communications technique which relies on the propagation of radio waves from an earth-based transmitter directed via reflection from the surface of the moon back to an earth-based receiver. History The use … Continue reading →

Mike Rupprecht – DK3WN. Software to decode telemetry that is transmitted by satellites. Running in a Windows environment: If you want to use the software written by Mike you can run in to some error situations. The reason for this … Continue reading →

In preparation for the construction of the Yagi, I have already made a box, where the 28 ohm dipole can be fixed in later. The box is a standard electric box normally used for final assembly of electric cables. You … Continue reading →

Transponder Passband When I tried to make my first QSO via a Satellite that uses a Linear Transponder, I got lost therefore I made the following table so that I had an idea on which frequency to transmit and what … Continue reading →