The validation of FY-3C MWRI total precipitable water products
Wu Qiong
(National Satellite Meteorological Center)
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投稿时间:2018-04-10    修订日期:2019-11-21
中文摘要: 中国自主研制的第二代极轨气象卫星的首颗业务星风云三号C星(FY-3C)于2013年9月23日发射升空。微波成像仪(MWRI)作为FY-3C上携带的重要微波载荷之一,能够实现对大气、海洋和陆地的全天时监测。其中,MWRI海上大气可降水(TPW)的产品在数值预报模式以及气候变化研究中具有很重要的应用价值,但是应用效果的好坏往往受到产品精度的制约。本文使用长达4年的卫星观测资料,通过比较MWRI TPW的业务产品和无电线探空以及SSMIS TPW的业务产品,对MWRI TPW产品(包括轨道产品、日产品和月产品)的质量进行了检验。结果表明,轨道产品和地面实际观测的探空数据的平均相对误差在7%左右,均方根误差为2.6mm。日产品和SSMIS日产品的均方根误差约为3mm,和探空日产品的均方根误差小于2.1mm。月产品和SSMIS月产品的均方根误差小于1.3mm。表明FY-3C MWRI TPW的业务产品长期以来一直稳定运行并且精度较高,具备实际应用的潜力。
Abstract:FY-3C is the second generation polar meteorological satellite which is developed by china independently and launched in September 23, 2013. MWRI (Microwave Radiance Imager) is an important microwave load which can monitor air, ocean and land. As a product of MWRI,TPW (Total Precipitable water) can be used in numerical weather prediction(NWP) and climate research. But, the result of application relied on the accuracy of TPW. By using 4-years satellite observation data, the quality of TPW products is validated through the comparison between TPW products and radiosonde TPW or SSMIS TPW. As a result, the RMSE (Root Mean Square Error) of orbit product is 2.6mm and the average relative error is 7%. What’s more, the RMSE of day product is 3mm and 2.1mm when separately compare with SSMIS and radiosonde. The accuracy of month product is stable and less than 1.3mm. The above conclusions show that FY-3C MWRI TPW products have a high precision and good stability. FY-3C MWRI TPW products have the application ability in weather and climate field.
文章编号:201804100163     中图分类号:    文献标志码:
吴琼,0.[en_title][J].Meteor Mon,():-.
Wu Qiong,0.The validation of FY-3C MWRI total precipitable water products[J].Meteor Mon,():-.