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Proceedings Paper

Automated test-site radiometer for vicarious calibration
Author(s): Xin Li; Ya-peng Yin; En-chao Liu; Yan-na Zhang; Li-na Xun; Wei Wei; Zhi-peng Zhang; Gang-gang Qiu; Quan Zhang; Xiao-bing Zheng
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Paper Abstract

In order to realize unmanned vicarious calibration, Automated Test-site Radiometer (ATR) was developed for surface reflectance measurements. ATR samples the spectrum from 400nm-1600 nm with 8 interference filters coupled with silicon and InGaAs detectors. The field of view each channel is 10 ° with parallel optical axis. One SWIR channel lies in the center and the other seven VNIR channels are on the circle of 4.8cm diameters which guarantee each channel to view nearly the same section of ground. The optical head as a whole is temperature controlled utilizing a TE cooler for greater stability and lower noise. ATR is powered by a solar panel and transmit its data through a BDS (China’s BeiDou Navigation Satellite System) terminator for long-term measurements without personnel in site. ATR deployed in Dunhuang test site with ground field about 30-cm-diameter area for multi-spectral reflectance measurements. Other instruments at the site include a Cimel sunphotometer and a diffuser-to-globe irradiance meter for atmosphere observations. The methodology for band-averaged reflectance retrieval and hyperspectral reflectance fitting process are described. Then the hyperspectral reflectance and atmospheric parameters are put into 6s code to predict TOA radiance which compare with MODIS radiance.

Paper Details

Date Published: 19 November 2014
PDF: 10 pages
Proc. SPIE 9264, Earth Observing Missions and Sensors: Development, Implementation, and Characterization III, 92640V (19 November 2014); doi: 10.1117/12.2069783
Show Author Affiliations
Xin Li, Anhui Institute of Optics and Fine Mechanics (China)
Ya-peng Yin, Anhui Institute of Optics and Fine Mechanics (China)
En-chao Liu, Anhui Institute of Optics and Fine Mechanics (China)
Yan-na Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Li-na Xun, Anhui Univ. (China)
Wei Wei, Anhui Institute of Optics and Fine Mechanics (China)
Zhi-peng Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Gang-gang Qiu, Anhui Institute of Optics and Fine Mechanics (China)
Quan Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Xiao-bing Zheng, Anhui Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9264:
Earth Observing Missions and Sensors: Development, Implementation, and Characterization III
Xiaoxiong Xiong; Haruhisa Shimoda, Editor(s)

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