LIU Ning, ZHANG Yongzhi, XIONG Yongliang. A Three-step Kalman Filter Algorithm for Near Real-time Estimating Tropospheric Wet Delay on GPS Reference Stations[J]. Geomatics and Information Science of Wuhan University, 2015, 40(7): 918-923. DOI: 10.13203/j.whugis20130600
Citation: LIU Ning, ZHANG Yongzhi, XIONG Yongliang. A Three-step Kalman Filter Algorithm for Near Real-time Estimating Tropospheric Wet Delay on GPS Reference Stations[J]. Geomatics and Information Science of Wuhan University, 2015, 40(7): 918-923. DOI: 10.13203/j.whugis20130600
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A Three-step Kalman Filter Algorithm for Near Real-time Estimating Tropospheric Wet Delay on GPS Reference Stations

    Abstract
  • Usingprioriinformationfromknowncoordinatesforreferencestations,basedontacombi nationofultrarapidephemeris,athree stepkalmanfilteralgorithmfornearreal timeestimationoftroposphericwetdelayonreferencestationsisproposed.Inthisalgorithm,widelaneambiguityandpseudorangemultipatherrorareseparatedbyusingaKalmanfilter,andthen,usingtheKalmanfilterforseparating犔１ａｍｂｉｇｕｉｔｙａｎｄｔｒｏｐｏｓｐｈｅｒｉｃｗｅｔｄｅｌａｙｂａｓｅｄｏｎｎａｉｏｎｏｓｐｈｅｒｅｆｒｅｅｃｏｍｂｉｎａｔｉｏｎｍｏｄ el.Afterthatestimatinganaccuraterelativetroposphericwetdelayparameterusingthecorrectlyfixed犔１ａｍｂｉｇｕｉｔｙｂａｃｋｓｕｂｓｔｉｔｕｔｉｏｎｍｅｔｈｏｄａｎｄｒｅｂｕｉｌｄｉｎｇｔｈｅＫａｌｍａｎｆｉｌｔｅｒ．Ｔｈｅｆｅａｓｉｂｉｌｉｔｙａｎｄａｃ curacyofthealgorithmisverifiedthroughnumericalexamples.
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