Snow multi-angle bi-directional reflectivity inversion method based on satellite remote sensing data

Abstract

The invention discloses a snow multi-angle bi-directional reflectivity inversion method based on satellite remote sensing data, and the method comprises the following steps: step 1, collecting remote sensing data, carrying out the preprocessing, and obtaining the snow surface single-angle bi-directional reflectivity of different wavebands; step 2, eliminating the terrain effect of the bi-directional reflectivity calculated according to the step 1 by using a C correction model; step 3, according to a calculation result of the step 2, constructing a snow white space albedo inversion model based on a progressive radiation transfer model; 4, according to a result of the step 3, constructing a snow multi-angle bi-directional reflectivity inversion model; and step 5, inverting the snow white blank albedo by using the snow multi-angle bi-directional reflectivity inversion model, and then inputting a related angle value to invert the snow multi-angle bi-directional reflectivity. The method can perform continuous multi-angle bi-directional reflectivity inversion on the snow in the large-range mountainous area, and has the advantages of no need of multi-day data, high efficiency and small influence of angle effect.

Description

technical field [0001] The invention relates to a method for inversion of multi-angle two-way reflectivity of snow cover based on satellite remote sensing data. Background technique [0002] Snow albedo reflects the inherent physical and chemical properties of snow, and accurate acquisition of snow albedo is the basis for inversion of snow albedo, snow equivalent optical particle size, and snow pollutant concentration. It plays an important role and significance in many fields such as climate change and regional climate change. The measured snow multi-angle reflectivity is the earliest and most direct means to obtain snow reflectivity, which can provide verification data for the research and development of snow two-way reflectivity model, and provide the best band design for satellite remote sensing sensor design. However, the cost of measuring snow reflectance is high, especially in inaccessible alpine mountainous areas, it is difficult to obtain large-scale snow reflectan...

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Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a multi-angle two-way reflectivity inversion method for snow cover based on satellite remote sensing data, which is used to solve the current There is a lack of methods for continuous multi-angle two-way reflectivity inversion of snow cover in large-scale mountainous areas in existing technologies. Existing methods for obtaining snow two-way reflectivity require multi-day single-angle remote sensing satellite data or on-site measurements parameters, there is a long time to collect data, low efficiency, and is greatly affected by the angle effect

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