18 September 2014 Design and characterization of a large aperture spectral radiance source integrating sphere for calibration of satellite remote sensors
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Proceedings Volume 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 928226 (2014) https://doi.org/10.1117/12.2069881
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China
Abstract
A large aperture uniform radiation source integrating sphere (URSIS) based on a 4m diameter internally illuminated integrating sphere with a 1.6m diameter exit port was designed and manufactured. This URSIS was used for pre-launch test and radiance calibration of large aperture imaging radiometers which fly aboard earth-borne remote satellites. Design criteria of the large aperture URSIS including sphere source radiance output, spatial radiance uniformity and radiance stability were presented. Integrating sphere internal lamp sources specifications and sphere coating selection were also concerned to suit the requirements of the multi-spectral-band imaging remote sensors. A new radiance calibration method of the URSIS based on Re-C blackbody was applied. The radiance calibration uncertainties varied from 2.8% to 3.5% with a coverage factor k=2 were achieved. The spectral radiance of the large aperture URSIS was characterized in the wavelength region from blue to near-infrared of spectrum. The spatial radiance uniformity of the large aperture URSIS was better than 99.0% and the stability was better than 0.4% over a period of 2 hours after an initial 30 minutes warm-up.
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Houping Wu, Yingwei He, Chundi Zheng, Guojin Feng, Chi Chen, Wei Dong, Ping Li, Yu Wang, "Design and characterization of a large aperture spectral radiance source integrating sphere for calibration of satellite remote sensors", Proc. SPIE 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 928226 (18 September 2014); doi: 10.1117/12.2069881; https://doi.org/10.1117/12.2069881
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