利用气象数据计算局部对流层湿延迟的方法Method of calculating accurate tropospheric wet delay for local area by meteorological data
范昊鹏;孙中苗;袁明泽;翟振和;
摘要(Abstract):
天顶对流层湿延迟是反演大气水汽含量的重要参数。该文通过研究局部地区垂直剖面气象条件的变化特征,提出了一种利用地表实时观测气象数据及历史资料计算当前时刻局部地区垂直剖面气象参数的方法,进而可利用积分方法精确求得该地区对流层湿延迟。通过与当前精度较高的经验模型对比,证明本文提出的方法能有效削弱局部地区对流层湿延迟误差,RMS和Bias误差可分别降低30%、50%左右;由于观测量仅是温度和湿度,故相较于利用GNSS等空间大地观测台站估计湿延迟的方法,本文方法的成本将小许多。
关键词(KeyWords): 气象参数;对流层湿延迟;水汽压模型;可降水量;欧洲中期天气预报中心
基金项目(Foundation): 国家自然科学基金项目(41674082,41774018)
作者(Authors): 范昊鹏;孙中苗;袁明泽;翟振和;
DOI: 10.16251/j.cnki.1009-2307.2019.09.020
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