Improved point spread function correction for aerosol measurements using wide-field stellar photometry

0579543 - FZÚ 2024 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Negi, Shefali - Ebr, Jan - Karpov, Sergey - Eliášek, Jiří
Improved point spread function correction for aerosol measurements using wide-field stellar photometry.
Journal of Physics: Conference Series. Vol. 2398. Bristol: IOP Publishing Ltd, 2022, č. článku 012019. ISSN 1742-6588. E-ISSN 1742-6596.
[International Workshop on Atmospheric Monitoring for High Energy Astroparticle Detectors (AtmoHEAD 2022). Anacapri (IT), 13.07.2022-15.07.2022]
Grant CEP: GA MŠMT(CZ) LM2018105; GA MŠMT LTT17006; GA MŠMT EF15_003/0000437
Institucionální podpora: RVO:68378271
Klíčová slova: wide-field stellar photometry
Obor OECD: Particles and field physics
https://iopscience.iop.org/article/10.1088/1742-6596/2398/1/012019/pdf

When using wide-field stellar photometry to measure Vertical Aerosol Optical Depth (VAOD), we model the dependence of measured stellar fluxes on the star color and position within the field of view of the imaging system in order to control systematic uncertainties introduced through those dependencies. In wide-field imagers, the Point Spread Function (PSF) varies significantly across the instrument's field of view (FOV) as the deformation of star images increases with the distance from the center of the FOV. While such dependence may be compensated using a synthetic flat-field correction created through the simultaneous analysis of many images, such an approach fails to account for the image-to-image changes in this correction due to minute changes in focus over time.
Trvalý link: https://hdl.handle.net/11104/0348365