Atmospheric Depth Models in the Field of View of LHAASO-WFCTA
July 05, 2021
The Wide Field-of-view Cherenkov Telescope Array (WFCTA) is one of the main components of the Large High Altitude Air Shower Observatory(LHAASO) located in Haizi Mountain,Daocheng County,Sichuan Province.WFCTA probes cosmic rays by observing Cherenkov photons generated by secondary particles in Extensive Air showers.Changes in atmosphere depth will lead to changes in the detection efficiency of WFCTA.Therefore, the variation of atmosphere depth plays an essential role in the calibration of WFCTA. In this proceeding,the temporal variation of atmosphere depth at LHAASO site is studied with the MSIS-90 atmosphere model,and compared with the American standard atmosphere model,Saber satellite experimental data, and observational data collected at the LHAASO site. MSIS-90 is used to obtain monthly atmosphere depth at the LHAASO site.
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