Title :
Tracking in Space by DOPLOC
Author_Institution :
Ballistic Res. Labs., Aberdeen Proving Ground, Md.
Abstract :
A satellite and space vehicle tracking system of the Doppler type, known as DOPLOC, is described. The characteristics of the heart of the system, a phase-locked tracking filter, are discussed from the viewpoints of bandwidth, signal-to-noise ratio, and accuracy of Doppler frequency measurement. System sensitivity to low energy signals is shown to be 2 ?? 10-29 watts at a bandwidth of 1 cps. Tracking ranges vs frequency are given for constant gain and constant aperture antennas. The advantages of DOPLOC in satellite tracking programs are briefly discussed.
Keywords :
Bandwidth; Error correction; Filters; Frequency measurement; Heart; Missiles; Radar tracking; Satellite broadcasting; Space vehicles; Voltage-controlled oscillators;
Journal_Title :
Military Electronics, IRE Transactions on
DOI :
10.1109/IRET-MIL.1960.5008245
