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

• Main Authors: ZHANG LIJUAN, WANG ZHONGTING, ZHANG YUHUAN, MAO HUIQIN, LI QING, CHEN HUI, WANG QIAO, MA PENGFEI, ZHOU CHUNYAN, CHEN CUIHONG
• Format: Patent
• Language: Chinese; English
• Published: 13.04.2018
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

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 charact