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- Title
The Comprehensive Accuracy Evaluation of Five Satellite Precipitation Products in the Coastal Basin at Multiple Spatio-temporal Scales.
- Authors
GAN Fu-wan; LI Yan-jie; NI Qian; GAO Yang
- Abstract
Three sub-products (IMERG-E, IMERG-L, IMERG-F) of the IMERGV06 and two sub-products (TMPA-V7, TMPA-RT) of the TMPA 3B42V07 are evaluated against the gauge data from 2008 to 2017 in Nanliujiang River Basin. The results show that: * On the daily scale, IMERG has better correlation (CC) and stability (RMSE) than TMPA for spatial scale. As the temporal scale is increasing, the differences between IMERG and TMPA products narrow, and TMPA-V7 gradually surpasses the near-real-time products of IMERG. From the spatial scale, the southeast stations have a relatively weak correlation and the southernmost stations have poor stability. * For one satellite product, the relative error (RB) between 15 gauges varies greatly, but for one gauge, the difference between five products is not significant. On the basin scale, the deviations of the post-real-time product are lower than those of the near-real-time products. IMERG-F tends to overestimate rainfall slightly, while IMERG-E and IMERG-L tend to underestimate rainfall to a higher degree. * The trends of the three categorical indicators (POD, FAR, CSI) with thresholds are similar at the basin and station scales. The ability of TMPA to detect light rainfall is relatively weak, while IMERG has been improved markedly. The detection performances of the five products on the rainstorm are not ideal and the distribution of the values of each station is more dispersed. Generally, IMERG-F can basically replace TMPA products in the Nanliu- jiang River Basin.
- Subjects
RAINSTORMS; GAGES
- Publication
China Rural Water & Hydropower, 2022, Issue 4, p72
- ISSN
1007-2284
- Publication type
Article