EVALUATION OF THE PHASE-LOCKED INTERFEROMETRIC TRACKING SYSTEM (PHINTS).
PAN AMERICAN WORLD AIRWAYS INC PATRICK AFB FLA
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The Phase-Locked Interferometric Tracking System PHINTS is a passive HF-VHF radio interferometer which employs baselines five wavelengths long. Its use as a pulse radar acquisition aid was evaluated by a series of satellite tracking tests conducted between 14 April 1966 and 11 May 1966. During these tests, the PHINTS system tracked the 126 MHz transmitters on board the Pegasus satellites and provided asimuth and elevation data to the Synchro inputs of an ANFPQ-6 radar. The radar acquired track of the satellite by slaving to PHINTS designate data and when necessary scanning about the PHINTS data. An analog off-axis corrector modification which after detection of a target return, would compensate for low frequency errors in the PHINTS data was added to the radar to increase the probability of acquisition. The radar used in the test program had previously been modified so that designation of target range was not required. Best acquisition results were obtained using either no scan or a 3 deggree circle scan. Comparison of the PHINTS and radar data indicate that the PHINTS data are accurate to plus or minus 1.5 degrees at elevation angles greater than 20 degree. The number of PHINTS-directed acquisitions and their distribution indicate that an ANFPQ-6 radar equipped with an analog off-axis corrector can use PHINTS data to reliably acquire track of targets at elevation angles between 20 and 70 degrees.
- Test Facilities, Equipment and Methods
- Active and Passive Radar Detection and Equipment