Journal of Science and Applicative Technology
Vol 6 No 1 (2022): Journal of Science and Applicative Technology June Chapter

Evaluasi Satellite Precipitation Product (GSMaP, CHIRPS, dan IMERG) di Kabupaten Lampung Selatan

Alvin Pratama (Program Studi Sains Atmosfer dan Keplanetan, Institut Teknologi Sumatera, Lampung Selatan 35365, Lampung, Indonesia)
Hayim Muhammad Agiel (Program Studi Sains Atmosfer dan Keplanetan, Institut Teknologi Sumatera, Lampung Selatan 35365, Lampung, Indonesia)
Ade Ayu Oktaviana (Program Studi Sains Atmosfer dan Keplanetan, Institut Teknologi Sumatera, Lampung Selatan 35365, Lampung, Indonesia)



Article Info

Publish Date
10 Apr 2022

Abstract

The availability of rainfall data is an important requirement in various activities. The limitations of observational data make the satellit precipitation product (SPPs) as an alternative. However, the data must be verified before being used. Verification methods are done by using matric statistic methods such as correlation, error and relative bias. Meanwhile, to see the ability of SPPs in detecting rainfall events, it uses a contingency table method. The purpose of this research is to evaluate the ability of SPPs against observation data. Evaluation of SPPs rainfall data is carried out based on a time scale, namely monthly, 10 daily, and daily. This research uses the data from 2018–2020. On a monthly and 10 daily scale, the CHIRPS data shows excellent linearity and rain detection ability. On a daily scale, IMERG shows better linearity than GSMaP and CHIRPS in every season, with moderate to strong correlation coefficients. However, these data tend to be underestimated with a very large bias. In terms of detecting daily rain, GSMaP tends to be better than CHIRPS and IMERG on every season based on the CSI index. However, in the dry season and transition II, the ability tends to be lower. In general, for the amount of rainfall intensity, the three SPPs data still has a fairly large error against the observation data eventhough the ability to detect rainfall is good.

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Journal Info

Abbrev

jsat

Publisher

Subject

Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Materials Science & Nanotechnology Mechanical Engineering

Description

Journal of Science and Applicative Technology is soon indexed by google scholar, SINTA (Science and Technology Index), portal garuda, DOAJ (Directory of Open Access Journals). This journal has been registered at PDII LIPI (ISSN: 2581-0545). This journal is semiannual journal. It will be published in ...