Open AccessWeather measurement system using near‐infrared differential spectroscopy
Author(s) -
Mizumoto I.,
Yoshi Y.,
Oguma H.,
Tsukada A.,
Sakai S.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2012.4359
Subject(s) - remote sensing , spectroscopy , infrared , infrared spectroscopy , environmental science , differential (mechanical device) , optics , materials science , physics , engineering , geology , astronomy , aerospace engineering , quantum mechanics
A weather measurement system was constructed using near‐infrared light‐emitting diodes and indium gallium arsenide photodiodes for the 1–2 µm near‐infrared region. The difference in the absorbance of water for near‐infrared light at wavelengths of 945 and 1450 nm was used to distinguish between three different precipitation types: snow, sleet and rain. From the ratio of the number of generated light absorption events at the two wavelengths, a distinction between snow, sleet and rain events was demonstrated. The judgement results by this system were consistent with those obtained from the meteorological observatory weather database.