Antenna pointing bias estimation using radar imaging

Details Antenna pointing bias estimation using radar imaging Antenna pointing bias estimation using radar imaging

2011-08-16

2011-08-16

Gregory, Bernarr E (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Testing or calibrating of radar system

By monitoring

C342S02500R, C342S027000, C342S028000, C342S061000, C342S062000, C342S063000, C342S073000, C342S074000, C342S075000, C342S080000, C342S082000, C342S089000, C342S118000, C342S134000, C342S139000, C342S140000, C342S146000, C342S147000, C342S149000, C342S165000, C342S175000, C342S176000, C342S179000, C342S195000, C244S003100, C244S003150, C244S003190

Reexamination Certificate

active

07999726

ABSTRACT:
A system for estimating an antenna boresight direction. The novel system includes a first circuit for receiving a Doppler measurement and a line-of-sight direction measurement corresponding with the Doppler measurement, and a processor adapted to search for an estimated boresight direction that minimizes a Doppler error between the Doppler measurement and a calculated Doppler calculated from the estimated boresight direction and the line-of-sight direction measurement. The line-of-sight direction measurement is measured relative to the true antenna boresight, and the calculated Doppler is the Doppler calculated for a direction found by applying the line-of-sight direction measurement to the estimated boresight direction. In a preferred embodiment, the first circuit receives a Doppler measurement and a line-of-sight direction measurement from each of a plurality of pixels, and the processor searches for an estimated boresight direction that minimizes a sum of squares of Doppler errors for each of the pixels.

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