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Global Precipitation Measurement (GPM) Status

机译：全球降水量测量（GPM）状态

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Global Precipitation Measurement (GPM) is a global space endeavor conceived by the US and Japan that has sparked global interest. Building upon the success of the Tropical Rainfall Measuring Mission (TRMM), it will initiate the measurement of global precipitation, a key climate factor. Its science objectives are to improve ongoing efforts to predict climate by providing near-global measurement of precipitation, its distribution, and physical processes; to improve the accuracy of weather and precipitation forecasts through more accurate measurement of rain rates and latent heating; and to provide more frequent and complete sampling of the Earth's precipitation. It has received endorsements from the World Climate Research Programme, the World Meteorological Organization, and the Committee on Earth Observation Satellites. GPM is envisioned to consist of a core spacecraft to measure precipitation structure and to provide a calibration standard for the constellation spacecraft, an international constellation of spacecraft to provide frequent precipitation measurements on a global basis, calibration/validation sites distributed globally with a broad array of precipitation-measuring instrumentation, and a global precipitation data system to produce and distribute global rain maps and climate research products. The National Aeronautics and Space Administration (NASA) plans to provide the core spacecraft, a constellation spacecraft and its launch, microwave radiometers, the precipitation processing system, the mission operations system, and an array of ground calibration and validation sites. The Japan Aerospace Exploration Agency (JAXA) plans to contribute the radar for and launch of the core spacecraft. The European Space Agency (ESA) has studied a European constellation satellite contribution. India and France have expressed their interest in participating through the Megha-Tropiques project. South Korea has proposed the contribution of regional ground validation sites. Other nations are also expected to play major a role in GPM. GPM is now in formulation phase and is one of the highest priority new Earth science missions for which NASA seeks final approval. GPM launches are targeted to begin in 2010.
机译：全球降水测量（GPM）是美国和日本构想的一项全球太空活动，已引起全球关注。在热带雨量测量团（TRMM）成功的基础上，它将启动对关键气候因素全球降水的测量。它的科学目标是通过提供降水，降水的分布和物理过程的近乎全球的测量，来改进正在进行的气候预测工作。通过更准确地测量降雨率和潜热来提高天气和降水预报的准确性；并提供更频繁，更完整的地球降水采样。它得到了世界气候研究计划署，世界气象组织和地球观测卫星委员会的认可。预计GPM将由核心航天器组成，以测量降水结构并为星座航天器提供校准标准；国际航天器星座将在全球范围内提供频繁的降水量测量；校准/验证点分布在全球范围内，分布广泛降水量测量仪器，以及一个全球降水量数据系统，用于制作和分发全球降雨图和气候研究产品。美国国家航空航天局（NASA）计划提供核心航天器，星座航天器及其发射器，微波辐射计，降水处理系统，任务运行系统以及一系列地面校准和验证站点。日本航空航天局（JAXA）计划为核心航天器提供雷达和发射服务。欧洲航天局（ESA）研究了欧洲星座卫星的贡献。印度和法国已表示有兴趣通过“梅格-特罗佩克斯”项目参与。韩国提出了对区域地面验证站点的贡献。预计其他国家也将在GPM中扮演重要角色。 GPM现在处于制定阶段，是NASA寻求最终批准的最优先的新地球科学任务之一。 GPM发布计划于2010年开始。

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