This thesis examines the effect on height determination of the antenna phase centre
variation of GPS user segment antennae. A discussion of the various antenna types in
common use is followed by an explanation of the problem at hand. In particular the
effect of the antenna's environment on the phase centre variation is covered more
fully, since the phase variation phenomenon itself is largely unexplained in the
engineering community to date.
A number of examples of the heighting errors caused by this phenomenon are
presented, followed by specifically designed experiments, which quantify the effect.
Finally the phase centre variation itself is modelled for a particular GPS antenna in
common use by surveyors in Australia.
The overall conclusion, arrived at by demonstration, is that the antenna phase centre
offsets and the variation model are very important for high accuracy determinations of
height.
| Identifer | oai:union.ndltd.org:ADTP/219059 |
| Date | January 2000 |
| Creators | Johnston, Gary Michael, n/a |
| Publisher | University of Canberra. Management & Technology |
| Source Sets | Australiasian Digital Theses Program |
| Language | English |
| Detected Language | English |
| Rights | ), Copyright Gary Michael Johnston |
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