Temperature sensitivity of the focal plane of thermal infrared splitting window band

Yanhua Zhao; Hao Wang; Libing Jin; Yan Li; Haijie Dong

doi:10.1117/12.2521956

12 March 2019 Temperature sensitivity of the focal plane of thermal infrared splitting window band

Yanhua Zhao, Hao Wang, Libing Jin, Yan Li, Haijie Dong

Proceedings Volume 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application; 1102338 (2019) https://doi.org/10.1117/12.2521956
Event: Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 2018, Xi'an, China

Abstract

It is widely used to correct the atmospheric and surface emissivity by using the split window algorithm to eliminate the atmospheric influence through the combination of the measured values of two adjacent channels (10.3-12.5 m) In the thermal infrared remote sensing inversion of surface temperature. With the increasing demand for split-window spectral data, the development of space optical remote sensors with these two spectral bands has gradually increased in recent years. High-resolution 5 full-spectrum spectral imager is a typical example. Its spatial resolution of thermal infrared split-window spectral band reaches 40m, which is an international advanced level. A large number of studies have shown that the thermal infrared splitting window is very sensitive to the focal plane temperature. With the change of the focal plane temperature, the imager output digital signal varies greatly. For example, when the focal plane temperature changes 0.1K, the 10.3-11.4m spectral band changes 0.02V (equivalent to 13.6DN), 11.5-12.5m spectral band changes 0.006V (equivalent to 4.08DN), so the temperature of FPA must be corrected or controlled strictly.

Citation Download Citation

Yanhua Zhao, Hao Wang, Libing Jin, Yan Li, and Haijie Dong "Temperature sensitivity of the focal plane of thermal infrared splitting window band", Proc. SPIE 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 1102338 (12 March 2019); https://doi.org/10.1117/12.2521956

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