Precise Positioning [1.01]

This project will capitalise on collaboration with international GNSS/RNSS receiver and software providers to focus on the unique Australian situation, where a national CORS network will inevitably have inter-station distances greater than those used in geographically smaller and more densely populated regions of the world. (Experience shows that solutions from commercial providers will target these larger and more profitable markets and may therefore not be ideally suited to the Australian context).

Enabling successful and reliable integer ambiguity resolution for multi-GNSS/RNSS positioning in real-time over large distances is a fundamental requirement for any ultra-precise GNSS parameter (position, attitude, time, troposphere, ionosphere) estimation.

Research themes

Two important research challenges will be addressed that emerge when processing multi-constellation, multi-frequency GNSS/RNSS data and that underpin the CRCSI program objectives of “instantaneous GNSS/RNSS positioning, anywhere, anytime, with the highest possible accuracy and the highest possible integrity”

  1. The development of new integer inference theory to allow the estimation and validation of large integer ambiguity sets under the emerging multi-GNSS/RNSS environment and the proliferation of CORS networks across Australia
  2. The facilitation of new ambiguity resolution-enabled precise point positioning through improved ionosphere and troposphere modelling

Highlights

  • Project participants held an August workshop, comprising lectures by Peter Teunissen on Theory of Integer Ambiguity Resolution; Network Estimability and S-transformations; Curtin method for PPP IAR
  • These positions have been filled:
    • 2 of three PhD positions
    • Boacheng Zhang has been appointed as a full time researcher at Curtin
    • Dr Yu has been appointed as a part time researcher at RMIT
    • Dr Verhagen will start as a visiting academic in Jan 2012 at Curtin
  • There are papers planned on single-frequency PPP and on Giove-GPS integration

Blog Posts

This research is unique because (1) it combines all the known Australian expertise on GNSS carrier phase ambiguity resolution; (2) it is based on advanced integer inference theory mastered by only a few; and (3) the research outputs are new and improve quality of GNSS ambiguity resolution based positioning

Project Participants

Research and Education   -   Curtin University   -   QUT   -   RMIT

43pl   -   AAM   -   GPSat   -   Leica   -   Omnistar   -   Septentrio

Government   -   Geoscience Australia   -   Landgate