Instrument calibration architecture of Radar Imaging Satellite (RISAT-1)

T. Misra; R. Bhan; D. Putrevu; P. Mehrotra; P. S. Nandy; S. D. Shukla; C. V. N. Rao; D. B. Dave; N. M. Desai

doi:10.1117/12.2223709

2 May 2016 Instrument calibration architecture of Radar Imaging Satellite (RISAT-1)

T. Misra, R. Bhan, D. Putrevu, P. Mehrotra, P. S. Nandy, S. D. Shukla, C. V. N. Rao, D. B. Dave, N. M. Desai

Proceedings Volume 9881, Earth Observing Missions and Sensors: Development, Implementation, and Characterization IV; 98811A (2016) https://doi.org/10.1117/12.2223709
Event: SPIE Asia-Pacific Remote Sensing, 2016, New Delhi, India

Abstract

Radar Imaging Satellite (RISAT-1) payload system is configured to perform self-calibration of transmit and receive paths before and after imaging sessions through a special instrument calibration technique. Instrument calibration architecture of RISAT-1 supported ground verification and validation of payload including active array antenna. During on-ground validation of 126 beams of active array antenna which needed precise calibration of boresight pointing, a unique method called "collimation coefficient error estimation" was utilized. This method of antenna calibration was supported by special hardware and software calibration architecture of RISAT-1. This paper concentrates on RISAT-1 hardware and software architecture which supports in-orbit and on-ground instrument calibration. Efforts are also put here to highlight use of special calibration scheme of RISAT-1 instrument to evaluate system response during ground verification and validation.

Citation Download Citation

T. Misra, R. Bhan, D. Putrevu, P. Mehrotra, P. S. Nandy, S. D. Shukla, C. V. N. Rao, D. B. Dave, and N. M. Desai "Instrument calibration architecture of Radar Imaging Satellite (RISAT-1)", Proc. SPIE 9881, Earth Observing Missions and Sensors: Development, Implementation, and Characterization IV, 98811A (2 May 2016); https://doi.org/10.1117/12.2223709

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