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Tracking in Space by DOPLOC

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1 Author(s)
DeBey, L.G. ; Ballistic Res. Labs., Aberdeen Proving Ground, Md.

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.

Published in:

Military Electronics, IRE Transactions on  (Volume:MIL-4 ,  Issue: 2-3 )