FURTHER DEVELOPMENT OF AN IMPROVED ALTIMETER WIND-SPEED ALGORITHM
FURTHER DEVELOPMENT OF AN IMPROVED ALTIMETER WIND-SPEED ALGORITHM
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DOI：
10.1029/jc091ic12p14250
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发表时间：
1986-12-15
影响因子：
3.6
通讯作者：
WENTZ, FJ
中科院分区：
文献类型：
--
作者：
CHELTON, DB;WENTZ, FJ
以前的高度计风速检索算法是基于大约4 ~ 14 ms−1的有限范围内的风速。在本文中，我们使用了一种新的方法，该方法给出了适用于0到21 ms−1范围内的风速模型函数。该方法是基于比较高度表标准化雷达横截面测量值的50公里沿航迹平均值与邻近的离最低点散射计风速测量值。散射计风是根据雷达横截面的100公里分组测量数据构建的，位于距卫星子轨道约200公里处。新的模型功能与早期版本在风速为14 ms−1时非常一致，但在更高的风速下差异显著。我们讨论了这些结果与1985年3月发射的地球卫星高度计的相关性。
A previous altimeter wind speed retrieval algorithm was developed on the basis of wind speeds in the limited range from about 4 to 14 ms−1. In this paper, we use a new approach which gives a wind speed model function applicable over the range 0 to 21 ms−1. The method is based on comparing 50 km along‐track averages of the altimeter normalized radar cross section measurements with neighboring off‐nadir scatterometer wind speed measurements. The scatterometer winds are constructed from 100 km binned measurements of radar cross section and are located approximately 200 km from the satellite subtrack. The new model function agrees very well with earlier versions up to wind speeds of 14 ms−1but differs significantly at higher wind speeds. We discuss the relevance of these results to the Geosat altimeter launched in March 1985.