Communications: directive radio wave systems and devices (e.g. – Determining distance – With pulse modulation
Reexamination Certificate
2007-05-15
2007-05-15
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With pulse modulation
C342S062000, C342S080000, C342S097000, C342S147000, C342S149000, C342S159000
Reexamination Certificate
active
11426721
ABSTRACT:
Reducing antenna boresight error includes receiving radar pulses reflected from the ground, where pulses are emitted from the antenna of a radar system, reflected by the ground, and received by the antenna. The return pulses carry information about the ground. Measurement indices are established from radar and platform parameters, and a clutter spectrum is generated from the return pulse information. The amplitude of the clutter spectrum is measured at each of the measurement indices. Whether there is an amplitude imbalance is established in accordance with the measured amplitudes. An error estimate describing an antenna boresight error is determined if there is an amplitude imbalance.
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Baker & Botts L.L.P.
Raytheon Company
Sotomayor John B.
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