A New Method for Aerosol Measurement using Wide-field Photometry
Jan Ebr, Sergey Karpov, Jiří Eliášek, Jiří Blažek, Ronan Cunniffe, Ivana Ebrová, Petr Janeček, Martin Jelínek, Jakub Juryšek, Dušan Mandat, Martin Mašek, Mirosl… 展开作者
Jan Ebr, Sergey Karpov, Jiří Eliášek, Jiří Blažek, Ronan Cunniffe, Ivana Ebrová, Petr Janeček, Martin Jelínek, Jakub Juryšek, Dušan Mandat, Martin Mašek, Miroslav Pech, Michael Prouza, Petr Travníček
We present a new method to measure the vertical aerosol optical depth (VAOD) during clear nights using a wide-field imager - a CCD camera with a photographic lens on an equatorial mount. A series of 30-second exposures taken at different altitudes above the horizon can be used to measure the VAOD with a precision better than 0.008 optical depths within a few minutes. Such a measurement does not produce any light and is thus suitable for use at sites where other astronomical instruments are located. The precision of the VAOD measurement depends on laboratory calibration of spectral properties of the system and of the response of the camera electronics to varying illumination levels, as well as careful considerations of details of stellar photometry and modelling of the dependence of measured stellar fluxes star color and position within the field of view. The results obtained with robotic setups at the future sites of the Cherenkov Telescope Array show good internal consistency and agreement with the simultaneous measurements from a Sun/Moon Photometer located at the same site.
Joint Diagnostics of Circumsolar Sky Brightness Using Coronagraphic Measurements and Aerosol Optical Inversions at Mauna Loa
National Solar Observatory（国家太阳观测台）；High Altitude Observatory, National Center for Atmospheric Research（高空观测站，美国国家大气研究中心）；Solar Scientific LLC（太阳科学有限责任公司）；Akamai Workforce Initiative, Institute for Scientist & Engineer Educators, University of California Observatories（阿卡迈劳动力倡议，科学家与工程师教育研究所，加州大学天文台）；Department of Physics and Astronomy, University of Hawai‘i at Mānoa（夏威夷大学马诺阿分校物理与天文学系）
Three-Dimensional Velocity Analysis and Particle Size Dynamics from Multi-Site RGB-Photometry of Noctilucent Clouds
Space Research Institute, Russian Academy of Sciences（俄罗斯科学院空间研究所）；Omsk educational institution "GDDYuT"（鄂木斯克教育机构“GDDYuT”）；V.I. Chuikov school at South-East（东南区V.I.丘伊科夫学校）
Going Forward with the Nancy Grace Roman Space Telescope Transient Survey: Validation of Precision Forward-Modeling Photometry for Undersampled Imaging
