RTK Feasibility Analysis for GNSS Snapshot Positioning
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hdl:2117/344908
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Data publicació2020
EditorION Publications (The Institute of navigation)
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Abstract
With snapshot positioning becoming popular for various applications, the present contribution focuses on the feasibility
of achieving Real Time Kinematics (RTK) positioning using snapshot data, i.e. a very brief interval of the
received satellite signal. This method is termed as Snapshot RTK (SRTK). We first introduce the general workflow
of snapshot positioning and the SRTK engine functioning blocks. Their differences from traditional receivers and
challenges brought by the short duration of data are explained. Since a major difference of this positioning method
is the generation of code and carrier-phase GNSS observables, we go through this procedure in details. In order to
explore the feasibility of achieving RTK under different scenarios, the rate of Integer Ambiguity Resolution (IAR)
is assessed by using snapshot measurements generated with different integration times and signal bandwidths under
zero-baseline configuration. Under these assumptions, the key factor that influences the RTK fix rate is the code
measurement noise. Double Difference (DD) code measurement errors are evaluated and plotted together with the
resulting IAR fix rates in order to find the relationship between them. The performance of using multi-constellation
and multi-frequency signals is tested as well. The fix rate can reach 100% when multiple constellations are used. The
achieved positioning accuracy is shown to be less than 5 mm in horizontal domain when IAR is achieved successfully.
Finally, some conclusions and thoughts about future research steps on SRTK are given.
CitacióLiu, X. [et al.]. RTK Feasibility Analysis for GNSS Snapshot Positioning. A: International Technical Meeting of The Satellite Division of the Institute of Navigation. "Proceedings of the 33rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2020), September 2020". Manassas, Virginia: ION Publications (The Institute of navigation), 2020, p. 2911-2921. ISBN 0-936406-26-7. DOI 10.33012/2020.17768.
ISBN0-936406-26-7
Versió de l'editorhttps://www.ion.org/publications/browse.cfm?proceedingsID=151
Col·leccions
- Departament de Física - Ponències/Comunicacions de congressos [673]
- gAGE - grup d'Astronomia i GEomàtica - Ponències/Comunicacions de congressos [69]
- Departament de Matemàtiques - Ponències/Comunicacions de congressos [1.080]
- Doctorat en Ciència i Tecnologia Aeroespacials - Ponències/Comunicacions de congressos [71]
Fitxers | Descripció | Mida | Format | Visualitza |
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GNSS20-0180.pdf | 2,194Mb | Accés restringit |