2012 Fiscal Year Final Research Report
Use of ASTER GDEM for a simulation of surface echo observed by a space borne rain radar
| Project/Area Number |
22560809
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Earth system and resources enginnering
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| Research Institution | Tokai University |
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Principal Investigator |
AWAKA Jun 東海大学, 札幌教養教育センター, 教授 (40232079)
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| Project Period (FY) |
2010 – 2012
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| Keywords | リモートセンシング / 降雨レーダ / デジタル高度 / ASTER |
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| Research Abstract |
In radar observations of rain from space, the radar receives not only rain echo but also a strong surface echo. In such a situation, separation between rain echo and surface echo is essential because the latter can be regarded as a clutter in the rain observation. This study examines the feasibility of using a high resolution, 30-m gridded, ASTER GDEM for the separation of rain echo and surface clutter. A simulation using the height information of ASTER GDEM shows a good agreement with the TRMM radar data obtained when the radar observing high mountain areas. It is shown that the use of ASTER GDEM is useful for the separation of rain echo and surface echo. There is a caution, however: the accuracy of ASTER GDEM becomes very low in certain areas and a care should be taken when using the data of these areas.
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