Articles | Volume 13, issue 5
https://doi.org/10.5194/amt-13-2635-2020
https://doi.org/10.5194/amt-13-2635-2020
Research article
 | 
20 May 2020
Research article |  | 20 May 2020

Development of on-site self-calibration and retrieval methods for sky-radiometer observations of precipitable water vapor

Masahiro Momoi, Rei Kudo, Kazuma Aoki, Tatsuhiro Mori, Kazuhiko Miura, Hiroshi Okamoto, Hitoshi Irie, Yoshinori Shoji, Akihiro Uchiyama, Osamu Ijima, Matsumi Takano, and Teruyuki Nakajima

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AR by Masahiro Momoi on behalf of the Authors (25 Mar 2020)  Author's response    Manuscript
ED: Publish as is (18 Apr 2020) by Monica Campanelli
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Short summary
The water vapor channel of sun photometers, such as a sky radiometer, has been calibrated at limited observation sites (e.g., Mauna Loa) in previous studies, but our procedure has made on-site calibration possible by using sky radiances in addition to direct solar irradiance. The retrieved precipitable water vapor values correspond well to those derived from a global-navigation-satellite-system–global-positioning-system receiver, a microwave radiometer, and an AERONET sun–sky radiometer.