New calibration technique for interferometric radiometers

Ignasi Corbella; Francisco Torres; Adriano Camps; Javier Bara

doi:10.1117/12.333649

21 December 1998 New calibration technique for interferometric radiometers

Ignasi Corbella, Francisco Torres, Adriano Camps, Javier Bara

Proceedings Volume 3498, Sensors, Systems, and Next-Generation Satellites II; (1998) https://doi.org/10.1117/12.333649
Event: Remote Sensing, 1998, Barcelona, Spain

Abstract

This paper presents a new method for receiver calibration of interferometric radiometers. It is based on the distributed noise injection mechanism and it consists of fully calibrating the baseline error terms of the central antennas (which share the same noise source) while keeping only separable error calibration for the distant ones. This improves the accuracy of the shortest baselines, which are the most significant ones due to the smoothness of the brightness temperature to measure. Simulations show that, compared to previously reported methods, the improvement on the radiometric resolution can be as high as 3.9. The robustness against frequency response mismatch between receivers is improved by a factor 2.9.

Citation Download Citation

Ignasi Corbella, Francisco Torres, Adriano Camps, and Javier Bara "New calibration technique for interferometric radiometers", Proc. SPIE 3498, Sensors, Systems, and Next-Generation Satellites II, (21 December 1998); https://doi.org/10.1117/12.333649

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