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1 INTRODUCTION As shown by much domestic and overseas study, the GPS technique can be used as a novel, efficient means in the measurement of water vapor. It increases the density of existing sounding sites both temporally and spatially and is useful in the remote sensing of regional and global content of water vapor[1]. The principle with which the GPS works in water vapor remote sensing is as follows[2]. While they are travelling to the receivers, GPS satellite signals are delayed in … 相似文献
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利用Google Maps、Flex和Asp.Net开发基于Web GIS的森林火场信息发布系统,提供包括日期、时间、经纬度和象素等火场信息的查询和进行火场定位,画出森林火场范围大小,快捷清晰地直观火场的地理环境,并通过网站对外发布火场信息。 相似文献
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红豆生南国,愿君多采撷,
春来发几枝,此物最相思。
这首《相思》是唐朝著名诗人王维青年时期所作,该诗题名又作《江上赠李龟年》。 相似文献
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＂赤橙黄绿青蓝紫,谁持彩练当空舞？雨后复斜阳,关山阵阵苍。当年鏖战急,弹洞前村壁。装点此关山,今朝更好看。” 相似文献
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REDEFINING ENSO EPISODES BASED ON CHANGED CLIMATE REFERENCES 总被引：1，自引：1，他引：1
1 INTRODUCTION Since the 21st century, a number of countries and regions, such as the United States[1], Japan[2] and the European Center for Medium Range Weather Forecasts have updated the climatic references in their operational meteorological products from the previous 1961 – 1990 reference period annual mean to the present 1971 – 2000 one. China, beginning from January 2003, also adopted the latter climate reference period. With the use of the new standard, the monthly mean field … 相似文献
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