A Navigation Technology Satellite Receiver.
NAVAL RESEARCH LAB WASHINGTON D C
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The report is a general functional description of a special purpose receiver for use with the Navigation Technology Spacecraft. The receiver consists of an R.F. front end and a data conversion unit. The receiver system operates on signals that are transmitted in a sidetone ranging spectrum by the Navigation Technology Satellite. The signals generated by the spacecraft system and received by the receiver system are synchronized by time standards located both on the spacecraft and at the receiver station. The time difference between transmission and reception of these signals is used to determine the distance between the spacecraft and the receiving station antennas. The report describes the implementation of a phase locked loop, sidetone ranging system with a real-time digital correlation technique. The technique involves interfacing an on line data averaging network with a dynamically operated data storage network. The technique provides advantages of minimizing drift errors because of environmental conditions, precision and flexibility in readout capabilities, and maximizing reliability of operation.
- Unmanned Spacecraft
- Radio Communications