Prelaunch infrared calibration of the GOES I-M imager and sounder

Edward C. Wack; Michael P. Weinreb; Joseph D. Lawrence

doi:10.1117/12.494209

15 November 2000 Prelaunch infrared calibration of the GOES I-M imager and sounder

Edward C. Wack, Michael P. Weinreb, Joseph D. Lawrence

Proceedings Volume 4135, Earth Observing Systems V; (2000) https://doi.org/10.1117/12.494209
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

We present the pre-launch infrared calibration of the Geostationary Operational Environmental Satellite (GOES) I-M Imager and Sounder. In addition to contractual performance verification, pre-launch calibration provides necessary information for on-orbit operations. These are system relative spectral response, non-linearity in radiometric response and verification of the accuracy of the on board calibration source. The JR channels are calibrated in a thermal vacuum chamber, under varying instrument operating conditions, with two external, temperature controlled blackbodies. A LN2 controlled target represents cold space, and a variable (200 K to 320 K) temperature target represents the Earth scene. We show methods and results for the following instrument performance parameters: system spectral response, noise, non-linearity and relative accuracy. As there is no absolute radiometric standard, the relative accuracy estimates are between the internal (used for on orbit operational calibration) and external calibration sources. Performance trends versus instrument operating condition and across serial number (SNO3-SNO7) are highlighted. We show residual calibration anomalies and describe probable causes.

Citation Download Citation

Edward C. Wack, Michael P. Weinreb, and Joseph D. Lawrence "Prelaunch infrared calibration of the GOES I-M imager and sounder", Proc. SPIE 4135, Earth Observing Systems V, (15 November 2000); https://doi.org/10.1117/12.494209

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