Using radar targets of opportunity to build a monopulse...

Details Using radar targets of opportunity to build a monopulse... Using radar targets of opportunity to build a monopulse...

2006-08-21

2009-06-16

Tarcza, Thomas H (Department: 3662)

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

Testing or calibrating of radar system

By monitoring

C342S149000, C342S152000

Reexamination Certificate

active

07548189

ABSTRACT:
In a radar system, a monopulse calibration table is constructed from live targets of opportunity. A center of gravity or weighted average of normalized signals ΔV received at SUM and DIFF channels from a live target are used to determine the target's actual azimuth. Off bore sight angles (OBA) of the target are then determined from the target's actual azimuth. Normalized received signal values of ΔV are converted to nearest-valued integers. The OBA s that correspond to each integer-valued normalized received signal are averaged and can then be plotted as a function of normalized received signal value ΔV. Different tables or plots can be constructed for elevation angles. An equation of a best-fit line the matches or at least closely approximates the plotted data is determined to smooth the actual data.

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Jacovitti G et al.: “Self-Calibrating SSR Monopulse Receiver”, IEEE Transactions on Aerospace and Electronic Systems USA, Oct. 4, 1992; pp. 944-949; vol. 28, No. 4.

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