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

A technology of satellite data and nitrous oxide, applied in measuring devices, electrical digital data processing, special data processing applications, etc., can solve the problems of signal-to-noise ratio reduction, large channel correlation, etc., and achieve the effect of reducing errors and improving efficiency

Active Publication Date: 2018-04-13
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 hyperspectral satellite data inversion nitrous oxide profile
  • Channel selection method and device for hyperspectral satellite data inversion nitrous oxide profile
  • Channel selection method and device for hyperspectral satellite data inversion nitrous oxide profile

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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 invention provides a channel selection method and device for a hyperspectral satellite data inversion nitrous oxide profile. The method comprises the following steps that: according to the brightness temperature change amplitude of the hyperspectral satellite data when nitrous oxide v1 and v3 absorption bands change along with gas concentration, selecting a spectrum interval with a maximum change amplitude as a sensitive channel set; according to the gas transmittance of the nitrous oxide v1 and v3 absorption bands and sensor observation noise, selecting a channel which is not covered withother gas adsorption characteristics and is low in sensor noise from the sensitive channel set as an optimal channel set; and according to the physical significance of a weighting function, selectingthe channel of which the height where a weighting function peak value is positioned is not overlapped from the optimal channel set as an inversion channel set. By use of the method, according to theinfrared adsorption characteristics of the nitrous oxide and the adsorption sensitive characteristics of different channels of the hyperspectral data for the nitrous oxide of different air pressure layers, the optimal channel is selected, so that the amount of information of target gas on the inversion channel is maximum, the amount of information of interference gas is minimum, and the inversionaccuracy of a nitrous oxide outline is highest.

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 Applications(China)
IPC IPC(8): G06F17/50G01N21/17G01N21/3504
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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