资源简介

摘要： GPM降水计划是继TRMM之后新一代全球卫星降水产品,其核心观测平台已于2014年2月28日发射,卫星群目前由10颗卫星组成,未来还有可能继续扩充。但目前国内还缺少专门介绍GPM计划及其产品的最新文章。新一代GPM降水产品分为4级,与以往的卫星降水产品相比具有更高的精度、更大的覆盖范围、更高时空分辨率,能够提供全球范围基于微波的3 h以内以及基于微波红外IMERG算法的30 min的雨雪数据产品,有利于促进水文、气象、农业和灾害等学科的研究和应用。与着重观测热带亚热带地区降水的TRMM相比,GPM能够更加精确地捕捉微量降水(<0.5 mm·h-1)和固态降水,这两种类型降水的观测对中高纬度地区和高原地区具有重要意义。对GPM计划的核心观测平台、算法产品、地面验证和应用前景等进行了阐述,有利于GPM产品在国内的应用和推广。 关键词： GPM;  TRMM;  降水观测;  水文气象     Abstract: GPM is designed to provide the next generation of global satellite precipitation products after TRMM,whose core observation platform has been launched on February 28,2014.The satellite constellation currently consists of 10 satellites,which is likely to expand in the future.To date,however,the latest paper devoted to the GPM mission and its newest products still lack in China.GPM precipitation products are divided into four levels with higher accuracy,greater coverage,higher spatial and temporal resolution compared with previous satellite precipitation products.Particularly,GPM can provide rain and snow data within three hours based on microwave or half hour based on microwave\|IR IMERG algorithm,and is anticipated to promote the development of a multitude of disciplines like hydrology,meteorology,agriculture,and disaster.Compared with the TRMM which focus on the observation of precipitation in tropical and subtropical regions,GPM can capture light rainfall (<0.5 mm·h-1) and solid precipitation more accurately,both critical precipitation types for the high\|latitude and high\|altitude regions.In this paper,we elaborated the GPM core observation,algorithm and products,ground verification and potential application prospects of the GPM mission,aiming to promote global precipitation related research and applications in China.

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