This paper obtained three cases of precipitation in Shanghai in the second half year of 2007 after applying the Geometry-matching method to do the Temporal-Spatial Matching of radar data derived from the precipitation radar (PR) on the TRMM (Tropical Rainfall Measuring Mission satellite) and from Shanghai Ground-based Radar (GR) in their effective sampling volume. To compare the difference between the volume-matched PR and GR radar reflectivity factor in consideration of the different frequencies of PR and GR, we adjust the echo intensity detected by Ground-based Radar (GR) which is in S-band to that value which is detected by Ku-band Radar (Ku-adjusted), and analyze the PR-GR deviation from different altitude layers and various precipitation types. The results show that: (1) The distribution and structure of PR are in accordance with GR echoes as a whole, whereas the PR echoes are more intense than the GR echoes generally. (2) Within and below the Bright-band, there is a high degree of correlation between PR and GR reflectivity data. (3) Due to the impact of beam filling and the attenuation of echoes, the mean deviation of PR-GR is larger in high altitude layer than in low altitude layer. (4) The variation characteristic of PR and GR echoes intensity has a higher degree of consistency from stratiform precipitation samples than convective precipitation samples. (5) In general, the GR data is closer to PR data after the Ku-adjusted.
WANG Zhenhui
,
LI Shengyin
,
DAI Jianhua
,
LI Nan
. Comparative Case Study on the Observations between the Space-borne Radar and Ground-based Radar[J]. Plateau Meteorology, 2015
, 34(3)
: 804
-814
.
DOI: 10.7522/j.issn.1000-0534.2014.00031
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