ION Technical Content
Multiple Blunders in Marine Navigation
| Abstract: | As differential GPS (DGPS) is being embraced by the marine community, it is being relied upon more and more for marine navigation and positioning. This means the reliability of the computed position is paramount. Previous analysis has shown that the GPS signals are often masked by obstructions, which results in degraded geometry and accuracy at best, and unreliable positions and navigation at worst. One question that is usually unanswered when it comes to reliable marine navigation is “What is the typical blunder behavior for marine navigation?” This question is answered through marine multipath simulations. The wide correlator simulations had a 99.9% blunder limit of 43 m, while the narrow correlator was only 11 m. Double blunders also occurred during the simulations, however, the second blunder was < 4 m (99.9% of the time). These blunder limits were then used as input to a least squares epoch by epoch reliability simulation. Limiting the blunders greatly improved the reliability performance of unaugmented DGPS. However, for reliable navigation in a constricted waterway DGPS must still be augmented with at least one additional constraint and potentially an additional satellite navigation system depending on the quality of the user’s receiver. |
| Published in: |
Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT |
| Pages: | 1444 - 1454 |
| Cite this article: | Ryan, Sam, "Multiple Blunders in Marine Navigation," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 1444-1454. |
| Full Paper: |
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