NDLI: Sampling errors of ssm/i and trmm rainfall averages: comparison with error estimates from surface data and a simple model (2000).

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Sampling errors of ssm/i and trmm rainfall averages: comparison with error estimates from surface data and a simple model (2000).

Content Provider	CiteSeerX
Author	Bell, Thomas L. Kundu, Prasun K. Kummerow, Christian D.
Abstract	Quantitative use of satellite-derived maps of monthly rainfall requires some measure of the accuracy of the satellite estimates. The rainfall estimate for a given map grid box is subject to both remote sensing error and, especially in the case of low-orbiting satellites, sampling error due to the limited number of observations of the grid box provided by the satellite. A simple model of rain behavior predicts that rms random error in grid-box averages should depend in a simple way on the local average rain rate, and the predicted behavior has been seen in simulations using surface rain gauge and radar data. This relationship is examined using Special Sensor Microwave Imager (SSM/I) satellite data obtained over the western equatorial Pacific during the Tropical Ocean and Global Atmosphere Coupled Ocean–Atmosphere Response Experiment. Rms error inferred directly from SSM/I rainfall estimates is found to be larger than was predicted from surface data and to depend less on local rain rate than was predicted. Preliminary examination of Tropical Rainfall Measuring Mission (TRMM) micro-wave estimates shows better agreement with surface data. A simple method of estimating rms error in satellite rainfall estimates is suggested, based on quantities that can be computed directly from the satellite data. 1.
File Format	PDF
Publisher Date	2000-01-01
Access Restriction	Open
Subject Keyword	Surface Data Simple Model Error Estimate Trmm Rainfall Average Rms Error Satellite Data Western Equatorial Pacific Limited Number Local Average Rain Rate Special Sensor Microwave Imager Radar Data Satellite-derived Map Rainfall Estimate Simple Method Local Rain Rate Low-orbiting Satellite Grid-box Average Satellite Estimate Grid Box Simple Way Monthly Rainfall Surface Rain Gauge Tropical Rainfall Measuring Mission Rain Behavior Micro-wave Estimate Preliminary Examination Satellite Rainfall Estimate Map Grid Box Tropical Ocean Remote Sensing Error Quantitative Use
Content Type	Text

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