Precise Positioning (1.01)
This project will capitalise on collaboration with international GNSS/RNSS receiver and software providers to focus on Australia, where a national CORS network will have inter-station distances greater than those used in smaller and more densely populated regions of the world. (Commercial solutions 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.
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”
- 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
- The facilitation of new ambiguity resolution-enabled precise point positioning through improved ionosphere and troposphere modelling
This quarter we welcome Nanthi to the P1.01 team. Nandakumaran Nadarajah (Nanthi) has a BScEng in electrical and electronic engineering from University of Peradeniya, and an MASc and PhD in electrical and computer engineering from McMaster University, Canada.
He joined Curtin University in 2010, working as a Research Fellow in the GNSS Research Centre. He primarily worked on Australian Space Research Program funded “Garada” project: SAR Formation Flying. In this context, he developed and implemented multi-GNSS multi-frequency attitude determination and relative positioning software. His research interests include GNSS attitude determination and relative positioning, nonlinear filtering and smoothing, and target tracking.
Nanthi’s work in P1.01 is in contributing to the algorithmic development of multi-GNSS carrier-phase ambiguity resolution and positioning strategies.
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This research is unique because it combines all the known Australian expertise on GNSS carrier phase ambiguity resolution; it is based on advanced integer inference theory mastered by only a few; and the research outputs are new and improve quality of GNSS ambiguity resolution based positioning
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