Wuhan University

China University of Geosciences (wuhan)

Tao He

Wen Zhang

Ming Li

Jun Lu

Siqi Feng

Yongsheng Liu

Haihong Chen

Zhaochu Hu

Qianqian Jiang

The present disclosure provides an adaptive atmospheric correction method of hyperspectral satellite based on prior ground object spectral matching. The method includes: establishing an adaptive atmospheric parameter retrieval algorithm of hyperspectral satellite data; based on the estimation algorithm of the integrated atmospheric column water vapor content, using a function between a linear regression band ratio and a water vapor content for estimation; in the aerosol optical depth estimation method of the hyperspectral data, using the rich spectral information of the hyperspectral data to perform AOD iterative estimation with the ground object spectral library as prior knowledge in combination with spectral matching, and establishing an atmospheric correction algorithm combining with an MODTRAN radiative transfer model. The method is applicable to hyperspectral data characteristics and has high accuracy; and without depending on external auxiliary data, atmospheric correction can be completed automatically.

Adaptive atmospheric correction method of hyperspectral satellite based on prior ground object spectral matching

The present invention provides an analysis method for determining halogens in geological samples by ICP-MS. The method includes following steps: weighing a geological sample and ammonium bifluoride in a sample dissolving tank, tightening the sample dissolving tank, and shaking; then heating the sample dissolving tank in a drying oven, and setting a temperature of the drying oven as 200-220&#xb0; C. and heating time as 1-2 hours; cooling the sample dissolving tank to room temperature so as to obtain a solid mixture after heating is ended, adding ammonium hydroxide into the solid mixture, centrifuging, removing a precipitate, and collecting the supernatant; adding an internal standard solution into the supernatant, and uniformly mixing; and optimizing the ICP-MS to an optimal state, testing content of chlorine in the supernatant under a condition of medium resolution m/&#x394;m=4000, and testing content of bromine and iodine in the supernatant under a condition of low resolution m/&#x394;m=300.

Analysis method for determining halogens in geological samples by ICP-MS

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Hubei, China

Tao He