Multi-objective star calibration study of total atmospheric transmittance measurement with stellar irradiance

The Langley-Plot calibration principles and measurement apparatus of total atmospheric transmittance were introduced. The multi-objective star calibration of total atmospheric transmittance measurements with stellar irradiance is presented, and calibration experimentations of the K,A spectral type stars were carried out .The calibration values based on the K, A types of stellar spectra were obtained. Comparison experiments between multi-objective star method and Langley-Plot method were carried out, and the reasonableness and correctness of multi-objective star calibration method have been verified. When take real-time measurement with the same type stellar spectra, the corresponding calibration parameters can be used to carry out the measurements of the atmospheric transmittance.