Phase calibration of a stepped-chirp signal for a synthetic aperture radar
First Claim
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1. A Radar Calibration Processor (“
- RCP”
) for calibrating the phase of a stepped-chirp signal utilized by a synthetic aperture radar (“
SAR”
), the RCP comprising;
a first non-periodic phase error (“
NPPE”
) calibrator;
a second NPPE calibrator; and
a periodic phase error (“
PPE”
) calibrator, wherein the PPE calibrator is in signal communication with the first NPPE calibrator,wherein the first NPPE calibrator is in signal communication with the second NPPE calibrator,wherein the PPE calibrator is configured to receive video phase history (“
VPH”
) data from the SAR and, in response, produces PPE calibrated data from the VPH data, andwherein the VPH data includes a plurality of steps within a stepped-chirped waveform and a range frequency.
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Abstract
A Radar Calibration Processor (“RCP”) for calibrating the phase of a stepped-chirp signal utilized by a synthetic aperture radar (“SAR”) is disclosed. The RCP includes a periodic phase error (“PPE”) calibrator, first non-periodic phase error (“NPPE”) calibrator in signal communication with the PPE calibrator, and a second NPPE calibrator in signal communication with the first NPPE calibrator.
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Citations
23 Claims
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1. A Radar Calibration Processor (“
- RCP”
) for calibrating the phase of a stepped-chirp signal utilized by a synthetic aperture radar (“
SAR”
), the RCP comprising;a first non-periodic phase error (“
NPPE”
) calibrator;a second NPPE calibrator; and a periodic phase error (“
PPE”
) calibrator, wherein the PPE calibrator is in signal communication with the first NPPE calibrator,wherein the first NPPE calibrator is in signal communication with the second NPPE calibrator, wherein the PPE calibrator is configured to receive video phase history (“
VPH”
) data from the SAR and, in response, produces PPE calibrated data from the VPH data, andwherein the VPH data includes a plurality of steps within a stepped-chirped waveform and a range frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- RCP”
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12. A method for calibrating the phase of a stepped-chirp signal utilized by a synthetic aperture radar (“
- SAR”
), the method comprising;estimating a first non-periodic phase error (“
NPPE”
);estimating for a second NPPE calibration after the first NPPE (“
NPPE-1”
) has been estimated; andestimating a periodic phase error (“
PPE”
),wherein the PPE is estimate prior to estimating the first NPPE, wherein estimating the PPE includes receiving video phase history (“
VPH”
) data from the SAR andproducing a PPE calibrated data from the VPH data in response to receiving the VPH data and wherein the VPH data includes a plurality of steps within a stepped-chirped waveform and a range frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- SAR”
-
23. A Radar Calibration Processor (“
- RCP”
) for calibrating the phase of a stepped-chirp signal utilized by a synthetic aperture radar (“
SAR”
), the RCP comprising;means for estimating a first non-periodic phase error (“
NPPE”
);means for estimating for a second NPPE calibration after the first NPPE (“
NPPE-1”
) has been estimated; andmeans for estimating a periodic phase error (“
PPE”
),wherein the PPE is estimate prior to estimating the first NPPE, wherein estimating the PPE includes receiving video phase history (“
VPH”
) data from the SAR andproducing a PPE calibrated data from the VPH data in response to receiving the VPH data and wherein the VPH data includes a plurality of steps within a stepped-chirped waveform and a range frequency.
- RCP”
Specification