【摘 要】
：
The thermal infrared channel (IRS4) of HJ-1B satellite obtains view zenith angles (VZA) up to retrieving land surface temperature (LST) from IRS4 data.This stud
【机 构】
：
State Key Laboratory of Earth Surface Processes and Resource Ecology,College of Resource Environment
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The thermal infrared channel (IRS4) of HJ-1B satellite obtains view zenith angles (VZA) up to retrieving land surface temperature (LST) from IRS4 data.This study aims at improving the mono-window algorithm for retrieving LST from IRS4 data.Based on atmospheric radiative transfer simulations,a model for correcting the VZA effects on atmospheric transmittance is proposed.In addition,a generalized model for calculating the effective mean atmospheric temperature is developed.Validation with the simulated dataset based on standard atmospheric profiles reveals that the improved mono-window algorithm for IRS4 obtains high accuracy for LST retrieval,with the mean absolute error (MAE) and root mean square error (RMSE) being 1.0 K and 1.1 K,respectively.Numerical experiment with the radiosonde profile acquired in Beijing in winter demonstrates that the improved mono-window algorithm exhibits excellent ability for LST retrieval,with MAE and RMSE being 0.6 K and 0.6 K,respectively.Further application in Qinghai Lake and comparison with the Moderate-Resolution Imaging Spectroradiometer (MODIS) LST product suggest that the improved mono-window algorithm is applicable and feasible in actual conditions.
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