Category Archives: Raspberry Pi

SGP4 is a Simplified General Perturbations mathematical model, which is used to calculate the position of satellites relative to the Earth.  The most frequently used model is SGP4, which is used with Two-Line Element (TLE) sets provided by NORAD and … Continue reading →

I am still learning and experimenting with the Adafruit Ultimate GPS HAT and the Raspberry Pi 2 Model B.  While I have the GPS tied into the system now, it doesn’t appear that the Raspbian NTP service is handling the … Continue reading →

As I continue to work on the Autonomous Satellite Antenna Tracking System (ASATS), to changes need to be made to setup the RPi so things happen automatically on power-up.  This requires two changes to the RPi: Setup for Automatic Login … Continue reading →

I started today’s experimentation by loading the gpredict program.  This was written by Alexandru Csete, at http://gpredict.oz9aec.net/ While his repository has all the source code, there is no reason to do anything other than load it into the pi, at … Continue reading →

Toward the end of last year I decided to make a small antenna satellite tracking system that was based on the Raspberry Pi.  It was to be entirely self-contained — no other computer devices required.  Seven months later, I’ve finally … Continue reading →

One of the goals I set for 2014 was to develop an antenna tracker that would be fully self-contained and not require an interface to a PC to obtain the tracking coordinates. The major components of the project are: Raspberry Pi … Continue reading →