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Determination of Cloud-top Height through Three-dimensional Cloud Reconstruction using DIWATA-1 Data

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Title: Determination of Cloud-top Height through Three-dimensional Cloud Reconstruction using DIWATA-1 Data
Authors: Castro, Ellison Browse this author
Ishida, Tetsuro Browse this author
Takahashi, Yukihiro Browse this author
Kubota, Hisayuki Browse this author
Jane Perez, Gay Browse this author
Marciano Jr, Joel S. Browse this author
Issue Date: 5-May-2020
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 10
Issue: 1
Start Page: 7570
Publisher DOI: 10.1038/s41598-020-64274-z
Abstract: Cloud-top height is a useful parameter with which to elucidate cloud vertical growth, which often indicates severe weather such as torrential rainfall and thunderstorms; it is widely used in meteorological research. However, general cloud-top height estimation methods are hindered by observational and analytical constraints. This study used data from DIWATA-1, the Philippines' first microsatellite, to overcome these limitations and successfully produce sophisticated three-dimensional cloud models via stereo-photogrammetry. High-temporal snapshot 200-ms-interval imaging of clouds over Iloilo, Philippines, is performed. Two types of telescopes were used to capture 30 stereoscopic cloud images at similar to 60- and similar to 3-m ground sampling resolutions; these were used to construct three-dimensional cloud models with 40- and 2-m vertical resolutions, respectively. The imaged clouds have heights of 2.0 to 4.8km, which is below freezing level for the Philippines and typical of stratocumulus and cumulus clouds. The results are validated using cloud-edge heights determined by measuring the distance from the clouds to their ground shadows. An RMSE of 0.32km and a maximum difference of 0.03km are found for the low- and high-resolution telescopes, respectively. For further validation, the results are compared with cloud-top heights estimated from HIMAWARI-8 images captured on the same day, yielding an average vertical difference of 0.15km and a maximum difference of 1.7km.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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