Abstract

The scan pattern of Dual-frequency Precipitation Radar (DPR) onboard the Global Precipitation Measurement (GPM) core satellite was experimentally changed for about 1 day from 13UTC on September 26th, 2017 to observe from nadir to about +34° scan angle assuming future spaceborne precipitation radar with wider swath width. The height and strength of the surface echo clutter with larger incident angle were assessed statistically to examine the possibility of the rainfall retrieval with wide swath observation by DPR. The results indicate that even in the larger incident angle, relatively intense rainfall can be retrieved while shallow and weak rainfall may not be acceptable for retrieval because it should be masked by surface clutter.

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