2 results about "Split window" patented technology

The application provides a thermal infrared multispectral surface parameter retrieval method based on channel correlation, and belongs to the technical field of remote sensing. The application determines the atmospheric water vapor content through a split window covariance ratio method, and then calculates the preliminary atmospheric transmittance of each channel; the correlation of the atmospheric transmittance is used as an optimization function to correct the preliminary atmospheric transmittance between adjacent channels; the atmospheric uplink radiation is obtained based on an atmospheric multilayer model and the atmospheric transmittance; the ASTER-TES is used to retrieve the surface temperature from the ground radiation brightness after the atmospheric correction, and the preliminary surface parameters are obtained; the transmittance ratio is used to correct the atmospheric transmittance, and the surface temperature is refined. The application directly retrieves the surface temperature and emissivity based on the thermal infrared multispectral image, avoids the restriction of the traditional surface temperature retrieval depending on the auxiliary parameters of the atmosphere and the surface emissivity, and the retrieval error problem caused by the space-time inconsistency of the auxiliary information of the atmosphere and the ground, and improves the accuracy of the surface temperature and the emissivity in the retrieval process.

The application discloses a high spatial resolution mountainous area surface temperature remote sensing inversion hybrid algorithm and belongs to the field of thermal infrared quantitative remote sensing research; the method comprises the following steps: constructing a mountainous area thermal infrared radiation transmission model, deducing a definition formula of a mountainous area small-scale self-heating parameter, defining a mountainous area effective emission rate, and constructing a mountainous area three-dimensional thermal infrared radiation transmission model; using a split window algorithm and simulated on-board brightness temperature data of each thermal infrared band, the optimal combination of the off-ground radiation brightness temperature of each band is estimated through optimal configuration of band combination selection; using a temperature-emission rate separation algorithm, the mountainous area surface temperature and the emission rate are separated from the off-ground radiation brightness temperature of each band at the same time; the application constructs a new mountainous area three-dimensional thermal infrared radiation transmission model and a remote sensing inversion hybrid algorithm capable of accurately inverting the high spatial resolution mountainous area surface temperature, and improves the remote sensing inversion precision of the high spatial resolution mountainous area surface temperature.