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Channel selection method and device for inversion of nitrous oxide profile from hyperspectral satellite data

A technology of satellite data and nitrous oxide, which is applied in measurement devices, special data processing applications, design optimization/simulation, etc., can solve problems such as signal-to-noise ratio reduction, large channel correlation, etc., and achieve the effect of reducing errors and improving efficiency

Active Publication Date: 2021-05-25
SATELLITE ENVIRONMENT CENT MINIST OF ENVIRONMENTAL PROTECTION
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Problems solved by technology

High spectral resolution leads to a large number of spectral channels within the detection range of the sensor and a reduction in the signal-to-noise ratio of a single channel, while there is a large correlation between channels

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  • Channel selection method and device for inversion of nitrous oxide profile from hyperspectral satellite data
  • Channel selection method and device for inversion of nitrous oxide profile from hyperspectral satellite data
  • Channel selection method and device for inversion of nitrous oxide profile from hyperspectral satellite data

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] At present, there are two main categories of inversion channel selection methods:

[0025] 1. Optimal Sensitivity Profile (OSP)

[0026] This type of method mainly considers the sensitivity of each channel to atmospheric parameters when selecting inversion channels, and selects the channel corresponding to the maximum peak value of each layer by calculating the Jacobian matrix. The selection mainly follows three principles: 1) If the radiation value of the best channel for observing a certain gas is regarded as "signal", and the interference information of other gases is regarded as "noise", then select the channel with a higher signal-to-noise ratio ; 2) When the...

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Abstract

The present invention provides a channel selection method and device for inverting nitrous oxide profile from hyperspectral satellite data, comprising: the brightness temperature change range of hyperspectral satellite data when nitrous oxide υ1 and υ3 absorption bands vary with gas concentration, and selecting The spectral interval with the largest variation range is used as the sensitive channel set; according to the gas transmittance of the nitrous oxide υ1 and υ3 absorption bands and the observed noise of the sensor, the channels that are not covered by other gas absorption characteristics and have less sensor noise are selected from the sensitive channel set as Optimize the channel set; according to the physical meaning of the weight function, select the channels whose peak heights of the weight function do not overlap from the optimized channel set as the inversion channel set. The present invention selects the optimal channel according to the infrared absorption characteristics of nitrous oxide and the sensitivity of different channels of hyperspectral data to the absorption of nitrous oxide in different pressure layers, so that the amount of target gas information on the selected inversion channel is large and the amount of interference gas information is large. small, the inversion accuracy of the nitrous oxide profile is high.

Description

technical field [0001] The invention relates to the field of thermal infrared hyperspectral greenhouse gas satellite remote sensing monitoring, and more specifically relates to a channel selection method and device for inverting nitrous oxide profile from hyperspectral satellite data. Background technique [0002] Nitrous oxide is a very important greenhouse gas and ozone depleter. However, due to the limited observation data of nitrous oxide, there are still many uncertainties in the quantitative description of nitrous oxide emissions, spatial distribution characteristics, feedback effects on the climate system, and impact on the distribution of the ozone layer. Traditional ground-based observation, due to the scarcity of stations and insufficient spatial coverage, cannot meet the application requirements. Thermal infrared satellite data can be used to invert and monitor methane and carbon dioxide gases, but the inversion of nitrous oxide is still rare. Therefore, in my co...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G01N21/17G01N21/3504
CPCG01N21/17G01N21/3504G01N2021/1795G01N2021/354G06F30/20
Inventor 马鹏飞厉青王桥张丽娟陈辉张玉环王中挺周春艳毛慧琴陈翠红
Owner SATELLITE ENVIRONMENT CENT MINIST OF ENVIRONMENTAL PROTECTION
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