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    Comparison of Precipitable Water Observations in the Near Tropics by GPS, Microwave Radiometer, and Radiosondes

    Source: Journal of Applied Meteorology:;2001:;volume( 040 ):;issue: 001::page 5
    Author:
    Liou, Yuei-An
    ,
    Teng, Yu-Tun
    ,
    Van Hove, Teresa
    ,
    Liljegren, James C.
    DOI: 10.1175/1520-0450(2001)040<0005:COPWOI>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The sensing of precipitable water (PW) using the Global Positioning System (GPS) in the near Tropics is investigated. GPS data acquired from the Central Weather Bureau?s Taipei weather station in Banchao (Taipei), Taiwan, and each of nine International GPS Service (IGS) stations were utilized to determine independently the PW at the Taipei site from 18 to 24 March 1998. Baselines between Taipei and the other nine stations range from 676 to 3009 km. The PW determined from GPS observations for the nine baseline cases are compared with measurements by a dual-channel water vapor radiometer (WVR) and radiosondes at the Taipei site. Although previous results from other locations show that the variability in the rms difference between GPS- and WVR-observed PW ranges from 1 to 2 mm, a variability of 2.2 mm is found. The increase is consistent with scaling of the variability with the total water vapor burden (PW). In addition, accurate absolute PW estimates from GPS data for baseline lengths between 1500 and 3000 km were obtained. Previously, 500 and 2000 km have been recommended in the literature as the minimum baseline length needed for accurate absolute PW estimation. An exception occurs when GPS data acquired in Guam, one of the nine IGS stations, were utilized. This result is a possible further indication that the rms difference between GPS- and WVR-measured PW is dependent on the total water vapor burden, because both Taipei and Guam are located in more humid regions than the other stations.
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      Comparison of Precipitable Water Observations in the Near Tropics by GPS, Microwave Radiometer, and Radiosondes

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4148329
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    contributor authorLiou, Yuei-An
    contributor authorTeng, Yu-Tun
    contributor authorVan Hove, Teresa
    contributor authorLiljegren, James C.
    date accessioned2017-06-09T14:07:40Z
    date available2017-06-09T14:07:40Z
    date copyright2001/01/01
    date issued2001
    identifier issn0894-8763
    identifier otherams-12935.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4148329
    description abstractThe sensing of precipitable water (PW) using the Global Positioning System (GPS) in the near Tropics is investigated. GPS data acquired from the Central Weather Bureau?s Taipei weather station in Banchao (Taipei), Taiwan, and each of nine International GPS Service (IGS) stations were utilized to determine independently the PW at the Taipei site from 18 to 24 March 1998. Baselines between Taipei and the other nine stations range from 676 to 3009 km. The PW determined from GPS observations for the nine baseline cases are compared with measurements by a dual-channel water vapor radiometer (WVR) and radiosondes at the Taipei site. Although previous results from other locations show that the variability in the rms difference between GPS- and WVR-observed PW ranges from 1 to 2 mm, a variability of 2.2 mm is found. The increase is consistent with scaling of the variability with the total water vapor burden (PW). In addition, accurate absolute PW estimates from GPS data for baseline lengths between 1500 and 3000 km were obtained. Previously, 500 and 2000 km have been recommended in the literature as the minimum baseline length needed for accurate absolute PW estimation. An exception occurs when GPS data acquired in Guam, one of the nine IGS stations, were utilized. This result is a possible further indication that the rms difference between GPS- and WVR-measured PW is dependent on the total water vapor burden, because both Taipei and Guam are located in more humid regions than the other stations.
    publisherAmerican Meteorological Society
    titleComparison of Precipitable Water Observations in the Near Tropics by GPS, Microwave Radiometer, and Radiosondes
    typeJournal Paper
    journal volume40
    journal issue1
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(2001)040<0005:COPWOI>2.0.CO;2
    journal fristpage5
    journal lastpage15
    treeJournal of Applied Meteorology:;2001:;volume( 040 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian