天基GNSS掩星資料誤差分析與質(zhì)量控制.pdf

1、南京信息工程大學(xué)碩士學(xué)位論文天基GNSS掩星資料誤差分析與質(zhì)量控制姓名：王洪申請學(xué)位級別：碩士專業(yè)：大氣遙感科學(xué)與技術(shù)指導(dǎo)教師：肖穩(wěn)安曹云昌20100501南京信息工程大學(xué)碩士論文AbstractBasedontheneedoftheapplieationofradiooccultationdataassimilation，thisstudyisfocusontheerrordistributionandqualitycontrolpr

2、ogramofspacebasedGNSSoccultationdataFirstlyCompared、衍t11radiosondedatatheCOSMICROsoundingdatashowsthatthedeviationis04oCforthetemperature，18％fortherefractivityindex，12hpaforthepressure，O007hpaforthevaporpressure；secondly

3、quitelargedeviationsofCOSMICdataindifferentseasonsandlatitudesarefoundInsummerthedeviationandtherootmeansquareerrors(RMS)ofvaporpressurewhichis02hpaand04hparespectivelyarethelargerthantheotherseason，andthedeviationisdesc

4、endinginfall，springandwinterInthelowtroposphere(0～5km)，thetempreturebiasatauttmmis一03oCthelargestinoneyear111epressurebiasisalsogreatestinsummerfollowedinspringandwinterInthelowtroposphere，therefractiveindexhasmorepositi

5、vebias，especiallyatmiddleandheighlatitudewhileat5～10kmaltitude，thelargesttempreturebiascanbefoundatsummer，whichis一03oCIntheNorthernHemisphere，thelargesttempreturebiasappearedapproximately17～18kmforlowlatitude，12kmformidd

6、lelatitude，and9kmforheighlatitudeInthelow(O～5km)theRMSofpressureincreases塒tlllatitude，whileincreasingtrendwasnotobviousatthetopThedeviationandRMSofthevaporpressurealelargestinthelowlatitude，whichare002hpaand04hparespecti

7、velyleastinthehi!ghlatitudewhilethebiasisO009hp&Whileusingradiosouderelativehumiditytocalculatevaporpressure，thedistinctionisfoundbetweeniceandwatersaturationvaporpressureStatisticssuggestthattheabsolutedeviationisabout1

8、0一hpaTomaketheGNSSoccultationdataimprovetheaccuracyofnumericalforecast，removingtheoutliersisimportant，thispaperresearchedtheGNSSoccultationdataqualitycontrolmethodsandthequalitycontrolprocessesinnumericalpredictionmodelK