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Global Positioning Satellite System (GPS)

Out of Date

The information on this page is out of date. Better information is available here .
Fabrication Responsibility:
T. Clark
Lyle Johnson, WA7GXD (USA)
Chuck Green, N0ADI (USA)
Stacked 195x200
Average Power Dissipation:
12 Watts (when on)


The computer is an essential part of the Global Positioning Satellite (GPS) Experiment. It is based on an Am29200 32-bit Reduced Instruction Set Computer (RISC) technology chip. It has 16 megabytes of error-correcting memory and uses the newly developed SIMM. It also has serial ports, a CAN port, a multi-channel 12-bit analog-to-digital converter for telemetry measurement, and a digital I/O port system to allow it to control and receive data from the RF module. The purpose of the computer is to control the GPS experiment, gather data and perform storage and computations to help determine the spacecraft's position and attitude, perform antenna pattern surveys on the GPS constellation, and perform such other tasks as seem useful or interesting to the GPS team and the general Amateur population.

The GPS computer is on a single PCB fitting inside a 195mm x 200mm module. It is currently being debugged and integrated with the RF module at the shack of N3EUA.

Last updated: Feb 4, 1996
by Ralf Zimmermann, DL1FDT