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    PPP-RTK platform performance based on single-frequency GPS data

    Access Status
    Fulltext not available
    Authors
    Odijk, Dennis
    Teunissen, Peter
    Zhang, Baocheng
    Date
    2011
    Type
    Conference Paper
    
    Metadata
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    Citation
    Odijk, D. and Teunissen, P. and Zhang, B. 2011. PPP-RTK platform performance based on single-frequency GPS data, in Proceedings of the 32nd Asian Conference on Remote Sensing 2011, ACRS 2011, Oct 3-7 2011, pp. 2113-2118. Tapei, Taiwan: Asian Association on Remote Sensing.
    Source Title
    32nd Asian Conference on Remote Sensing 2011, ACRS 2011
    Additional URLs
    http://saegnss1.curtin.edu.au/Publications/2011/Odijk2011PPP-RTK.pdf
    ISBN
    9781618394972
    School
    Department of Spatial Sciences
    URI
    http://hdl.handle.net/20.500.11937/35709
    Collection
    • Curtin Research Publications
    Abstract

    As an improvement over 'conventional' PPP, Real-Time Kinematic Precise Point Positioning (PPP-RTK) is a promising technique for high-precision (cm-level) carrier-phase based remote sensing platform positioning. The key to obtain these very precise positions is that the user should be able to resolve the ambiguities in the phase data to their integer values, as then his phase data starts to act as if they were very precise code data. In order to do so, the user needs to apply corrections to his GPS data. In addition to corrections for the satellite clocks and ionospheric delays, as with 'conventional' PPP, crucial to restore the integerness of the ambiguities is that the PPP-RTK user needs appropriate corrections for the satellite phase hardware biases. In our approach these corrections are determined by a regional network of CORS stations. To provide the most precise corrections to the PPP-RTK user, the corrections should be based on a solution in which the network ambiguities are resolved to their integer values. Furthermore, in our approach the ambiguity-fixed network ionospheric delays are interpolated to the approximate user location. So far very fast -even instantaneous- PPP-RTK integer ambiguity resolution performance has been reported based on dual-frequency GPS data. However, the technique becomes more attractive when it can be applied to users that operate with low-cost mass-market single-frequency receivers as well. In this contribution we demonstrate that our PPP-RTK approach can be applied to these users without any modification. Results are presented of the performance of single-frequency PPP-RTK for both a high-grade and a low-grade GPS receiver.The conclusion reads that single-frequency PPP-RTK integer ambiguity resolution is feasible, even using a low-cost receiver: following an initialization time of less than 5 minutes the correct integers can be resolved in real-time, thus providing cm-level positioning.

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      © 2017 American Society of Civil Engineers. The concept of real-time kinematic precise point positioning (PPP-RTK) is to achieve integer ambiguity resolution (IAR) at a single global navigation satellite system (GNSS) ...
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