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首页> 外文会议>Asian Conference on Remote Sensing(ACRS2005); Asian Space Conference; 20051107-11; 20051107-11; Ha Noi(VN); Ha Noi(VN) >Estimation of Precipitable Water Distribution over Land Using NOAA/AVHRR Data and GPS-derived Precipitable Water
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Estimation of Precipitable Water Distribution over Land Using NOAA/AVHRR Data and GPS-derived Precipitable Water

机译：利用NOAA / AVHRR数据和GPS衍生的可降水量估算陆地上的可降水量分布

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摘要

Precipitable water (PW) is an important variable in climate system, hydrological system, or terrestrial ecosystem. The PW has been measured mainly by radiosondes over land, and nowadays it can also be measured by GPS. In Japan, GEONET (GPS Earth Observation Network System) has provided us with the PW data sets since 1996. However, the PW obtained from GEONET distribute discretely. Satellite remote sensing is useful for obtaining continuous spatial distribution of the PW. Since NOAA/AVHRR has two thermal channels in the water vapor absorption region, the AVHRR is applicable to estimate total column PW. In this study, we examined the possibility of the AVHRR data in measuring PW by comparing AVHRR split window temperature difference with GPS-derived PW, and found that there was high correlation between them. Then, by using this relationship, we estimated the PW distribution over land in Japan.
机译：可降水量（PW）是气候系统，水文系统或陆地生态系统中的重要变量。 PW主要通过地面上的无线电探空仪测量，如今也可以通过GPS测量。在日本，自1996年以来，GEONET（GPS地球观测网络系统）为我们提供了PW数据集。但是，从GEONET获得的PW离散分布。卫星遥感对于获得PW的连续空间分布很有用。由于NOAA / AVHRR在水蒸气吸收区域中有两个热通道，因此AVHRR可用于估算总塔PW。在这项研究中，我们通过将AVHRR分割窗口温度差与GPS衍生的PW进行比较，检验了AVHRR数据在测量PW中的可能性，并发现两者之间具有高度相关性。然后，利用这种关系，我们估算了日本土地上的PW分布。

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