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Sean Devlin

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Proceedings Article | 11 June 2021 Open Access

The STAR-CC-OGSE system for pre-flight sensor calibration

S. Devlin, P. D. Green, W. Kingett, J. Lin, J. Nicholls, G. Maker, N. P. Fox

Proceedings Volume 11852, 118526J (2021) https://doi.org/10.1117/12.2600300

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Reliable characterization and radiometric calibration of satellite sensors are critical to their optimal performance on-orbit. The uses of satellite sensor data, with their increased use in long-term environmental monitoring and climate studies mean that the performance and data quality provided by a single sensor can no longer be considered in isolation but needs to be considered as a part of the international Earth Observation (EO) infrastructure and referenced to common standard, the SI. The drive for improved performance, together with the desire for inter-operability between sensors creates increased demands on the pre-flight characterization and radiometric calibration of sensors. Sensor pre-flight characterization and calibration facilities, or optical ground support equipment (OGSE) test sensor performance over a few broad categories including geometric performance/image quality together with spectral and radiometric calibration. The specific requirements of the sensor have historically created a drive for a bespoke OGSE. For large-scale multi-sensor series programs, a bespoke solution may remain the preferred solution. However, for single/few unit explorer missions, the expense & post-use redundancy of a bespoke OGSE system may be prohibitive. NPL together with M Squared lasers has developed a universal OGSE facility, the Spectroscopically Tunable Absolute Radiometric calibration & characterization OGSE (STAR-CC-OGSE), a versatile facility for the radiometric calibration and characterization of satellite sensors. The system is provided fully characterized, calibrated and performance verified, with an easy to use software interface that allows fully automated remote operation

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