Conical scan tracking system employing a large antenna

Details Conical scan tracking system employing a large antenna Conical scan tracking system employing a large antenna

1977-07-25

1978-10-24

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 74, 343118, G01S 342, G01S 356

Patent

active

041224540

ABSTRACT:
A conical scan tracking system for spacecraft and radio sources employing a large antenna detects small sinusoidal modulation in received power from a source that is off target with a frequency equal to a very low scan rate, an amplitude proportional to angular deviation of the source from the target, and a phase directly related to the direction the source is off target. The sinusoid is digitally correlated with inphase and out-of-phase (90.degree.) scan sinusoids to obtain azimuth/elevation and hour angle/declination signals which are digitally integrated over exactly one scan period (e.g., 10 to 100 sec) to obtain correction signals for an antenna pointing subsystem.

REFERENCES:
patent: 3842420 (1974-10-01), Rabow
patent: 3859658 (1975-01-01), Rabow
patent: 3886555 (1975-05-01), Royal
patent: 3924235 (1975-12-01), Heller et al.

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