Technique for improving the calibration of large-area sphere sources

James Walker; Christopher L. Cromer; James T. McLean

doi:10.1117/12.46707

1 August 1991 Technique for improving the calibration of large-area sphere sources

James Walker, Christopher L. Cromer, James T. McLean

Proceedings Volume 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation; (1991) https://doi.org/10.1117/12.46707
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

A new technique for improving the accuracy of radiance calibrations for large-area integrating-sphere sources has been investigated. Such sources are used to calibrate numerous aircraft and spacecraft remote sensing instruments. Recent measurements performed at NIST and NASA Goddard Space Flight Center have demonstrated that the uncertainty of sphere-source radiance measurements can be improved from the present 5 to 10 percent level to a 1 to 2 percent level. Silicon detectors with bandpass filters mounted in front of them and calibrated for absolute spectral responsivity can be used to confirm and to monitor the absolute radiance of a sphere source.

Citation Download Citation

James Walker, Christopher L. Cromer, and James T. McLean "Technique for improving the calibration of large-area sphere sources", Proc. SPIE 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation, (1 August 1991); https://doi.org/10.1117/12.46707

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