Enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications
GNSS-based attitude determination is a viable technique with a large spectrum of applications. Attitude determination requires an accurate relative positioning solution, that can be provided by the very precise GNSS carrier phase observables. The phase observables are, however, biased by unknown int...
| Main Authors: | , , , |
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| Format: | Conference Paper |
| Published: |
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/43495 |
| _version_ | 1848756709939478528 |
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| author | Giorgi, G. Teunissen, Peter Odijk, Dennis Buist, P. |
| author_facet | Giorgi, G. Teunissen, Peter Odijk, Dennis Buist, P. |
| author_sort | Giorgi, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | GNSS-based attitude determination is a viable technique with a large spectrum of applications. Attitude determination requires an accurate relative positioning solution, that can be provided by the very precise GNSS carrier phase observables. The phase observables are, however, biased by unknown integer ambiguities, that must be resolved in order to fully exploit their higher precision. By applying the optimal integer least-squares (ILS) principle and introducing a nontrivial modification of the popular LAMBDA method, a set of geometrical nonlinear constraints given by the known antennas placement on the platform is embedded in the ambiguity search method. The multivariate constrained LAMBDA method is described and tested: the large improvement in fixing the correct set of integer ambiguities from single-frequency, single-epoch observations is stressed, as this is the most challenging scenario for ambiguity resolution. The method is tested by processing and analyzing actual GNSS data, collected on both static and dynamic platforms. The experimental results show the enormous improvement obtained when applying the nonlinearly constrained, mixed integer GNSS attitude model, resulting in a very strong reduction in the Time-To-Fix. ©2010 IEEE. |
| first_indexed | 2025-11-14T09:16:31Z |
| format | Conference Paper |
| id | curtin-20.500.11937-43495 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:16:31Z |
| publishDate | 2010 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-434952017-09-13T14:01:05Z Enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications Giorgi, G. Teunissen, Peter Odijk, Dennis Buist, P. GNSS-based attitude determination is a viable technique with a large spectrum of applications. Attitude determination requires an accurate relative positioning solution, that can be provided by the very precise GNSS carrier phase observables. The phase observables are, however, biased by unknown integer ambiguities, that must be resolved in order to fully exploit their higher precision. By applying the optimal integer least-squares (ILS) principle and introducing a nontrivial modification of the popular LAMBDA method, a set of geometrical nonlinear constraints given by the known antennas placement on the platform is embedded in the ambiguity search method. The multivariate constrained LAMBDA method is described and tested: the large improvement in fixing the correct set of integer ambiguities from single-frequency, single-epoch observations is stressed, as this is the most challenging scenario for ambiguity resolution. The method is tested by processing and analyzing actual GNSS data, collected on both static and dynamic platforms. The experimental results show the enormous improvement obtained when applying the nonlinearly constrained, mixed integer GNSS attitude model, resulting in a very strong reduction in the Time-To-Fix. ©2010 IEEE. 2010 Conference Paper http://hdl.handle.net/20.500.11937/43495 10.1109/PLANS.2010.5507206 restricted |
| spellingShingle | Giorgi, G. Teunissen, Peter Odijk, Dennis Buist, P. Enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications |
| title | Enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications |
| title_full | Enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications |
| title_fullStr | Enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications |
| title_full_unstemmed | Enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications |
| title_short | Enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications |
| title_sort | enhancing the time-to-fix for the unaided single-frequency integer ambiguity resolution in gnss attitude determination applications |
| url | http://hdl.handle.net/20.500.11937/43495 |