排序方式： 共有13条查询结果，搜索用时 187 毫秒
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高频对流层延迟（ZTD）的提取对于反映水汽含量的高时间分辨率瞬时变化及其在暴雨短临预报中的应用具有重要意义。基于精密单点定位技术（PPP）分析了不同采样间隔的卫星钟差对PPP-ZTD精度的影响。结果表明,卫星钟差的时间间隔小于30 s时,所获得的PPP-ZTD(RMS<4 mm)比5 min间隔的（RMS<6 mm）精度要高;而5 s与30 s采样间隔的卫星钟差所获得的ZTD精度相当。 相似文献
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????GRACE??????????????????????????????????????仯??????????????о??伾????????仯??????????????????仯?????????ж??????????????????????????????仯???????????????δ?????????仯???????о???????????GRACE????????????????????????????仯??????????????cm????Ч???仯?? 相似文献
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??????PPP????????IGS?ο????????????ж??PPP???????????????PPP??ZTD?????????????PPP??ZTD??IGS??????ZTD?ο???????????????PPP???????????????????????30 s????????t???????????????<6 mm???? 相似文献
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储层非均质性是影响油气藏中油、气、水渗流及油气采收率的主要内因。进行储层非均质研究,对查明油藏剩余油分布、采取合理注采措施、提高采收率显得十分必要。以吉林油田大208区黑帝庙油层三角洲前缘亚相储层为例,采用隔夹层识别对比、沉积微相分析、地质统计学系数和劳伦兹系数方法分析了层间、层内和平面非均质性。研究表明：黑帝庙油层发育3套稳定隔层,据此可划分为3套开发层系; 夹层在各单砂体中比较发育,应将夹层分割的注采井归为不同注采井网; 非均质性受沉积微相影响明显,水下分流河道和河口坝微相的非均质性最强; 地质统计学参数和劳伦兹系数研究表明,黑帝庙油层10个单砂体均为极强的非均质性,统计学参数往往偏离强非均质标准甚远,而劳伦兹参数值分布于0～1间,更能直观定量的表现出储层宏观非均质性强弱。 相似文献
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This paper is an introduction to a new project of the national basic research program of China, “Upper Ocean Response Feedback Mechanisms to Typhoon”. The importance and necessity of this project, regarding the national interests, are discussed at the beginning. Then, the ocean typhoon interaction is proposed as a cutting-edge research topic, in terms of the physical mechanism, data assimilation method, and forecast technique. Latest research progresses are reviewed on the oceanic response and feedback to typhoon, the large scale interaction between the ocean and typhoon, the multi source ocean data assimilation related to typhoon, and typhoon forecast model. Finally, the key scientific questions and the major research contents are presented. bstract: This paper is an introduction to a new project of the national basic research program of China, “Upper Ocean Response and Feedback Mechanisms to Typhoon”. The importance and necessity of this project, regarding the national interests, are discussed at the beginning. Then, the ocean typhoon interaction is proposed as a cutting-edge research topic, in terms of the physical mechanism, data assimilation method, and forecast technique. Latest research progresses are reviewed on the oceanic response and feedback to typhoon, the large scale interaction between the ocean and typhoon, the multi source ocean data assimilation related to typhoon, and typhoon forecast model. Finally, the key scientific questions and the major research contents are presented. 相似文献
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多通道地基微波辐射计在0713号"韦帕"台风登陆前后探测性能及特征分析 总被引：2，自引：0，他引：2
利用上海市气象局2007年9月进行的"韦帕"台风探测试验资料和地面常规观测资料,对多通道地基微波辐射计在0713号"韦帕"台风登陆前后探测性能及特征进行了分析。结果表明:多通道地基微波辐射计探测的温度和相对湿度趋势与GPS探空得到的基本一致,尽管二者之间存在一些小的差异,但也表明了微波辐射计对台风具有一定的探测能力。0713号"韦帕"台风登陆前后温度和水汽密度场上,甚短生命史的冷暖气柱和高水汽密度柱十分活跃,体现了"韦帕"台风登陆前后的阵性特征。 相似文献
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?????????????GPS????????б·?????????????????????????????????????????????￡?б·??????????????????????о??????????????????????????????????????????????????????????淽?????о???????????????????????????????????????????????????GPS???????????ν???????????????????????????????????????????????GPS???????????????????????????????????????????????????????? 相似文献
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?????????????ZTD?????????????????????????????????仯????????????????е???t?????????塣??????????λ??????PPP???????????????????????????PPP-ZTD??????????????????????????????С??30 s?????????PPP-ZTD(RMS<4 mm)??5 min??????RMS<6 mm????????????5 s??30 s??????????????????????ZTD???????? 相似文献