Three Pseudolite Experiment at SNAP

During the period from 19th to 27th January 2000, two sets of IntegriNautics IN200C pseudolite were provided to SNAP on-loan from Prof. Elizabeth Cannon's GPS group (at the Dept. of Geomatics Engineering, University of Calgary, Canada) for experiments. Together with the pseudolite owned by SNAP, this made a total of three pseudolites available for tests to study the utility of GPS when augmented by signals from one or more pseudolite.

Two series of experiment were conducted, with the three pseudolites transmitting simulated GPS signals from the roofs of buildings while two NovAtel Millennium receivers were operating on the ground simultaneously making GPS and pseudolite measurements. The first experiment involved setting up the three pseudolites at three different locations on the roof of the GAS Building with the two NovAtel receivers sited on the roof of an adjacent multi-storey carpark. The second experiment was conducted in the vicinity of the UNSW Cricket Ground Ð the two NovAtel receivers sited on the cricket field while the three pseudolites were located on the roofs of three surrounding buildings (see below). Data were collected with the rover receiver operating in both static and dynamic mode. Pseudo-range and carrier phase measurements were logged Ð dual-frequency data from GPS receivers, but only L1 data from the pseudolites. The data has been processed and several papers written.

Pseudolite transmitter atop the GAS building

Pseudolite transmitter atop the Applied Science building

Pseudolite transmitter atop the Warrane College building

• Download a PDF file giving progress on this project ( to Nov.'99)
• CHOI, I.K., WANG, J., HAN, S., & RIZOS, C., 2000. Pseudolites: Anew tool for surveyors? 2nd Trans Tasman Survey Congress, Queenstown, New Zealand, 20-26 August, 141-149. (Download PDF)
• DAI, L., ZHANG, J., RIZOS, C., HAN, S., & WANG, J., 2000. GPS and pseudolite integration for deformation monitoring applications. 13th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Salt Lake City, Utah, 19-22 September, 1-8. (Download PDF)
• WANG, J., TSUJII, T., RIZOS, C., DAI, L., & MOORE, M., 2000. Integrating GPS and pseudolite signals for position and attitude determination: Theoretical analysis and experiment results. 13th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Salt Lake City, Utah, 19-22 September, 2252-2262. (Download PDF)