Research on the observation modes of high-precision automated ground-solar-sky radiometer

Ganggang Qiu; Xu Zhong; Zhiwen Feng; Zongkun Wei

doi:10.1117/12.2690464

17 August 2023 Research on the observation modes of high-precision automated ground-solar-sky radiometer

Ganggang Qiu, Xu Zhong, Zhiwen Feng, Zongkun Wei

Proceedings Volume 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023); 127570J (2023) https://doi.org/10.1117/12.2690464
Event: 3rd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2023), 2023, Kunming, China

Abstract

In recent years, the automated observation calibration of satellite remote sensing sensors has been widely used. At least 2~3 automated observation devices are usually required to complete the collection of necessary parameters such as surface reflectance, aerosol optical depth, and sky scattering radiation in the calibration field. In this paper, a high-precision automated ground-solar-sky radiometer (GSSR) is developed, which provides 9 working modes, including direct solar irradiance mode (SUN), solar almucantar scanning mode (ALM), almucantar in the hemisphere scanning mode (ALMH), solar principal plane scanning mode (PPL), principal plane in the hemisphere scanning mode (PPLH), ground observation mode (GRD), in-orbit synchronization mode (SYNC), sky radiance channels calibration mode (SKYCLB), and ground radiance channels calibration mode (GRDCLB). The 9 working modes can realize the automatic measurement of direct solar irradiance, sky diffuse irradiance, and ground radiation with high accuracy, and then invert the basic parameters required for vicarious calibration in site of satellite remote sensing sensor. It can realize the absolute radiation calibration of visible-near-infrared wavebands when the satellite remote sensing sensor overpass by one instrument only by itself. At the same time, the long sequence of sky diffuse and ground radiance measurement data is helpful for analyzing the evolution of atmospheric and surface spectral characteristics in the calibration field over a long period.

Citation Download Citation

Ganggang Qiu, Xu Zhong, Zhiwen Feng, and Zongkun Wei "Research on the observation modes of high-precision automated ground-solar-sky radiometer", Proc. SPIE 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023), 127570J (17 August 2023); https://doi.org/10.1117/12.2690464

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KEYWORDS

Radiometry

Calibration

Satellites

Sensors

Reflectivity

Remote sensing

Equipment

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