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—Off-axis ellipsoid reflector based off-focus configuration for deastigmatism and circularization of an elliptical Gaussian beam is proposed. Mostly used off-axis ellipsoid reflector based conventional configuration is constructed by aligning the incident direction directed to one focus of the ellipsoid, which reflect the output beam to the another focus of… (More)
The radar altimeter prelaunch calibration was commonly carried our by return signal simulator. The principles of return signal simulator, biases such as quadratic phase bias, amplitude and phase biases, delay bias were described in detail in this paper. In the last section the overall system bias on return signal simulator was calculated.
Using the along track processing and delay correction, a Synthetic Aperture Radar (SAR) altimeter has better retrieved accuracies of the geophysical ocean parameters than conventional radar altimeters (CRAs). The retrieved accuracies of a SAR altimeter are relevant to the shape of ocean echo wave and the number or averaged pulses and the effective number of… (More)