Inversion method for land aerosols optical thickness based on environment satellite 1

Abstract

The invention discloses an inversion method for land aerosols optical thickness based on the environment satellite 1. The method comprises the following steps of: S1, simulating and observing geometric atmospheric conditions, conducting radiation transfer calculation to obtain atmospheric parameters, and forming a lookup table; S2, according to auxiliary data, extracting the observed zenith angleand azimuth angle of each pixel, calculating solar zenith angle and azimuth angle, and obtaining observation geometry; S3, preprocessing CCD (Charge Coupled Device) data of a satellite HJ-1A / B; S4, obtaining the land surface reflectance information of each waveband by utilizing a dark target algorithm, interpolating the lookup table into the observation geometry of each pixel, calculating the land surface reflectance under different land aerosols optical thickness according to the obtained apparent reflectance after preprocessing, and then fitting to obtain the land aerosols optical thickness. The method can be used for quickly and conveniently realizizng land aerosols monitoring on a large scale and providing a data source for particulate pollution monitoring.

Description

technical field [0001] The invention relates to the technical field of atmospheric remote sensing, in particular to a land aerosol optical depth inversion method based on the Environment-1 satellite. Background technique [0002] The study of satellite remote sensing aerosols began in the mid-1970s. In the last 30 years of the last century, the satellite remote sensing aerosols used for research and operational use included volcanic eruption aerosol monitoring, NOAA, the United States National Oceanic and Atmospheric Administration) series satellites remote sensing of optical depth of aerosol layer caused by dust storms and forest fires over the deep sea, infrared remote sensing of dust aerosol remote sensing, TOMS remote sensing of absorbing aerosol in ultraviolet band, etc. The Moderate Resolution Imaging Spectrometer (MODIS) carried by Terra and Aqua of the US Earth Observing System Program (EOS) released the global distribution products of 10 km aerosol optical depth to ...

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Problems solved by technology

[0003] The current satellite remote sensing terrestrial aerosol inversion algorithms are mostly dark target algorithms. This method mostly uses short-wave infrared bands to identify dark targets and obtain surface reflectance to obtain aerosols. However, the acquisition of short-wave infrared band data is complicated, and it requires Satellite remote sensing sensors have very high requirements, and special band settings are required. Another convenience also leads to an increase in its cost

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