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Enabling technologies to map precipitation with near-global coverage and hour-scale revisit times

机译:使技术能够用近全球覆盖率和小时级重访时间映射降水量

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The Tropical Rainfall Measuring Mission (TRMM) is a joint NASA/NASDA mission intended to produce rainfall accumulation maps using a combined active radar and passive radiometer set of sensors. The TRMM orbit inclination of 35 deg limits coverage to the tropics. The single satellite limits sampling (revisit time) to at best 15 hours. A new measurement concept is presented which extends and improves on the performance of TRMM. Global, rather than tropical, coverage is provided by a polar orbit inclination. The concept is comprised of a "core" spacecraft, which is an upgraded version of TRMM, together with /spl sim/8 smaller constellation satellites which carry a subset of radiometers. Proper orbital phasing of the core and constellation satellites will improve temporal sampling to /spl sim/3 hours. An overview of the concept is presented, followed by a description of current technology development projects which are underway to enable the measurement.
机译:热带降雨测量使命(TRMM)是NASA / NASDA任务,旨在使用组合的活跃雷达和无源辐射计的传感器产生降雨积累地图。 35°的TRMM轨道倾向限制了热带地区的覆盖范围。单颗卫星限制了最佳15小时的采样(重新访问时间)。提出了一种新的测量概念,其延伸并提高了TRMM的性能。通过极地轨道倾向提供全局,而不是热带,覆盖范围。该概念由“核心”航天器组成,该概念是TRMM的升级版本,以及/ SPL SIM / 8较小的星座卫星,其携带辐射仪的子集。核心和星座卫星的适当轨道阶段将改善时间采样至/ SPL SIM / 3小时。提出了该概念的概述,然后描述了正在进行测量的当前技术开发项目的描述。

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