中国工程科学
中國工程科學
중국공정과학
ENGINEERING SCIENCE
2014年
6期
27-32
,共6页
贾永君%刘建强%林明森%张有广
賈永君%劉建彊%林明森%張有廣
가영군%류건강%림명삼%장유엄
风速%雷达高度计%海洋二号
風速%雷達高度計%海洋二號
풍속%뢰체고도계%해양이호
wind speed%radar altimeter%HY-2
海面风速对海洋中动能的转移、海气间物质和能量的交换具有非常重要的作用。海洋二号(HY-2)卫星搭载的雷达高度计、微波散射计和扫描微波辐射计均可以用来探测海面风速。区别是雷达高度计只能测量星下点风速，微波散射计可以得到宽刈幅的风场（包括风向和风速），扫描微波辐射计可获得宽刈幅的风速。为了更好地分析3个载荷风速测量能力，针对2013年9月19日“天兔”台风影响海域范围内的海面风速，比较了3种载荷的探测结果。结果表明，在小于20 m/s风速范围内，雷达高度计和微波散射计探测到的风速非常接近，标准偏差小于2 m/s，而扫描微波辐射计测量的风速比另外两个载荷测量的风速大；在20～35 m/s风速范围内，雷达高度计和扫描微波辐射计风速较为接近；在大于35 m/s的高风速区，只有扫描微波辐射计可以探测出风速，但其测量精度还需要进一步验证。
海麵風速對海洋中動能的轉移、海氣間物質和能量的交換具有非常重要的作用。海洋二號(HY-2)衛星搭載的雷達高度計、微波散射計和掃描微波輻射計均可以用來探測海麵風速。區彆是雷達高度計隻能測量星下點風速，微波散射計可以得到寬刈幅的風場（包括風嚮和風速），掃描微波輻射計可穫得寬刈幅的風速。為瞭更好地分析3箇載荷風速測量能力，針對2013年9月19日“天兔”檯風影響海域範圍內的海麵風速，比較瞭3種載荷的探測結果。結果錶明，在小于20 m/s風速範圍內，雷達高度計和微波散射計探測到的風速非常接近，標準偏差小于2 m/s，而掃描微波輻射計測量的風速比另外兩箇載荷測量的風速大；在20～35 m/s風速範圍內，雷達高度計和掃描微波輻射計風速較為接近；在大于35 m/s的高風速區，隻有掃描微波輻射計可以探測齣風速，但其測量精度還需要進一步驗證。
해면풍속대해양중동능적전이、해기간물질화능량적교환구유비상중요적작용。해양이호(HY-2)위성탑재적뢰체고도계、미파산사계화소묘미파복사계균가이용래탐측해면풍속。구별시뢰체고도계지능측량성하점풍속，미파산사계가이득도관예폭적풍장（포괄풍향화풍속），소묘미파복사계가획득관예폭적풍속。위료경호지분석3개재하풍속측량능력，침대2013년9월19일“천토”태풍영향해역범위내적해면풍속，비교료3충재하적탐측결과。결과표명，재소우20 m/s풍속범위내，뢰체고도계화미파산사계탐측도적풍속비상접근，표준편차소우2 m/s，이소묘미파복사계측량적풍속비령외량개재하측량적풍속대；재20～35 m/s풍속범위내，뢰체고도계화소묘미파복사계풍속교위접근；재대우35 m/s적고풍속구，지유소묘미파복사계가이탐측출풍속，단기측량정도환수요진일보험증。
Sea surface wind speed plays a very important role in the transfer of kinetic energy in the ocean and the exchange of the matter and energy in the air-sea surface. There are three payloads on HY-2 satellite which can be used to detect the sea surface wind speed. The payloads are radar altimeter,microwave scatterometer and scanning microwave radiometer. The diffe-rence is that the radar altimeter can measure the wind speed at the nadir point of the HY-2 satel-lite,the microwave scatterometer can detect the wide swath wind field,and the scanning micro-wave radiometer can measure the wide swath wind speed only. In order to analyze the capacity of the three payloads,in this study,the Typhoon Usagi was selected for comparing the ability of the three payloads to measure the wind speed. It turned out that when the wind speed is lower than 20 m/s,the wind speed from radar altimeter is much the same as that from microwave scat-terometer. The standard deviation is less than 2 m/s. But when wind speed is between 20 m/s and 35 m/s,the wind speed of radar altimeter is close to the scanning microwave radiometer. Only the scanning microwave radiometer is able to detect the wind speed higher than 35 m/s. Before using it to measure the wind speed higher than 35 m/s,we have to assess the accuracy of measurement.
