English  |  正體中文  |  简体中文  |  Post-Print筆數 : 27 |  Items with full text/Total items : 113656/144643 (79%)
Visitors : 51699118      Online Users : 525
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
    •  Adv. Search
    Home ‧ Login ‧ Upload ‧ Help ‧ About ‧ Administer Goto mobile version


    Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/133616


    Title: GEO‑pivoted carrier ambiguity resolution: a method for instantaneous ambiguity resolution in mid‑low‑latitude regions
    Authors: 儲豐宥
    Chu, Feng-Yu
    楊名
    Yang , Ming
    陳彥廷
    Chen , Yan-Ting
    Contributors: 地政系
    Keywords: BeiDou system;Instantaneous ambiguity resolution;Mid-low-latitude regions;Single-epoch real-time kinematic positioning
    Date: 2020-06
    Issue Date: 2021-01-19 11:37:18 (UTC+8)
    Abstract: The effect of DD ionospheric delays can be unexpectedly large in the range of the equatorial anomaly, that is, in mid-low-latitude regions near noon and/or afternoon, and the large delays cause instantaneous AR to fail even over short baselines. Ionospheric delays can be represented by a function of vertical total electron content values, which often have significant latitudinal gradients in mid-low-latitude regions near noon and/or afternoon. Therefore, a short separation between the pivot and secondary satellites in the latitudinal direction indicates smaller effects of DD ionosphere. In the BeiDou system (BDS), five geostationary earth orbit (GEO) satellites are nearly motionless over the equator. We can use adjacent GEO satellites to form a DD pair whose pivot and secondary satellites are close in latitude (< 4°). Moreover, when inclined geosynchronous orbit or medium earth orbit (IGSO/MEO) satellites approach the equator, the separations between the IGSO/MEO and GEO satellites in the latitudinal direction will be minimal. Therefore, this study proposes a method called GEO-pivoted carrier AR (GEOCAR) for instantaneous AR. This method mitigates the influence of DD ionospheric delays by pivoting GEO satellites in BDS DD pairs and uses a trade-off design between the ionosphere-fixed and ionosphere-weighting models to resolve integer ambiguities of dual-frequency phases. Experimental short-baseline data (< 10 km) collected in mid-low-latitude regions near noon and afternoon are tested with conventional AR and GEOCAR methods. The results show that the GEOCAR can effectively produce higher success percentages than the conventional AR with improvements reaching 68.62% for BDS and 42.55% for BDS/GPS.
    Relation: GPS solutions, Vol.23, No.107, pp.1-14
    Data Type: article
    DOI 連結: https://doi.org/10.1007/s10291-019-0884-5
    DOI: 10.1007/s10291-019-0884-5
    Appears in Collections:[地政學系] 期刊論文

    Files in This Item:

    File SizeFormat
    424.pdf2390KbAdobe PDF2279View/Open


    All items in 政大典藏 are protected by copyright, with all rights reserved.


    社群 sharing

    著作權政策宣告 Copyright Announcement
    1.本網站之數位內容為國立政治大學所收錄之機構典藏，無償提供學術研究與公眾教育等公益性使用，惟仍請適度，合理使用本網站之內容，以尊重著作權人之權益。商業上之利用，則請先取得著作權人之授權。
    The digital content of this website is part of National Chengchi University Institutional Repository. It provides free access to academic research and public education for non-commercial use. Please utilize it in a proper and reasonable manner and respect the rights of copyright owners. For commercial use, please obtain authorization from the copyright owner in advance.

    2.本網站之製作，已盡力防止侵害著作權人之權益，如仍發現本網站之數位內容有侵害著作權人權益情事者，請權利人通知本網站維護人員(nccur@nccu.edu.tw)，維護人員將立即採取移除該數位著作等補救措施。
    NCCU Institutional Repository is made to protect the interests of copyright owners. If you believe that any material on the website infringes copyright, please contact our staff(nccur@nccu.edu.tw). We will remove the work from the repository and investigate your claim.
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback