顾及地形起伏的中国低纬度地区湿延迟与可降水量转换关系研究

On the Relation Between the Wet Delay and the Water Precipitable Vapor in Consideration of Topographic Relief in the Low-latitude Region of China

    摘要
  • 摘要: 在地基GPS气象学中,湿延迟(zenithwetdelay,ZWD)与可降水量(precipitablewatervapor,PWV)的转换系数犓是一个重要的参数?疚睦弥泄臀扯鹊厍ǎ玻埃埃场悖巍玻福病悖危玻案鎏娇照荆玻埃埃浮玻埃保蹦甑奶娇帐荩治隽藸酥邓娌庹疚扯群秃0蔚谋浠卣鳎⒔⒘艘恢治扌枵镜闫笫?仅与站点纬度、年积日和海拔相关的区域转换系数犓值腜汀=峁砻鳎髡酒骄鶢酥捣直鹚嫖扯取⒑０蔚脑龃蠖跣?减小速率分别为0.0002/(°)和0.002/km;本文建立的区域模型的精度与单站模型或者通过加权平均温度(犜犿）获得的转换系数犓值的精度相当，可用于该区域无气象数据条件下ＧＰＳ反演ＰＷＶ

     

    Abstract: Theconversioncoefgficient betweenthezenithwetdelayandtheprecipitablewatervaporisanimportantparameteringround basedGPSmeteorology.Thedataof20radiosondestationsfrom2008to2011inalow latituderegionofChina(20.03°N～28.2°N)wereusedtoanalyzethechangeof withrespecttolatitudeandheight.Aregionalconversioncoefficient modelwithoutanymeteoro logicalparameterswasconstructedbyconsideringsitelatitude,dayoftheyear,andsiteheight.Theresultsshowthatthemeanvaluesof ateachsitetendtoreducewithincreasinglatitudeandheightattheratesof0.0002perdegreeand0.002perkilometer,respectively.Theregionalconversioncoef ficient modelhasalmostsameaccuracyasthatofthesite specificmodelorasestimatedbytheweightedmeantemperature,andcanbeusedtoobtainGPSPWVintheappliedregionwithoutanymeteorologicalparameters.

     

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