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Wide Area Augmentation System Research and Development. Final rept.
| 题名： | Wide Area Augmentation System Research and Development. Final rept. |
| 作者： | van Graas-F. |
| 关键词： | *Research-and-development; *Navigation-aids; *GPS-.;Inmarsat-; Geostationary-satellites; Multipath-error; Accuracy-; Antennae-. |
| 摘要： | In support of the development of the Wide Area Augmentation System (WAAS), three projects were performed under Aviation Cooperative Agreement 01-G-016. The first project involved participation in the WAAS Integrity Performance Panel (WIPP), which included the development of the Code Noise and MultiPath (CNMP) monitor, review of integrity documentation, as well as the analysis of specific integrity monitors. The second project was focused on the characterization and reduction of Geostationary Satellite (GEO) multipath error. The third project involved the prototyping of a dual-frequency Integrated Multipath-Limiting Antenna (IMLA) for WAAS Reference Sites (WRS) to improve the accuracy of the pseudorange measurement data. The need for the CNMP monitor originated from the WIPP meetings, where data collection results showed relatively large multipath errors that negatively affected the performance of the differential corrections. The CNMP monitor is documented in Section 2.0. To improve the utility of the Inmarsat, narrow -band Geostationary Satellites (GEOs), a project was initiated to characterize and reduce the multipath error on the GEO signals as received at the WRS. Section 3.0 details the characterization methodology, which includes both ground and flight tests. Design, prototyping and test results of a dual-frequency, Integrated Multipath-Limiting Antenna (IMLA) for potential use in the WRS are presented in Section 4.0. Section 5.0 contains a description of a new methodology to measure and correct for GPS antenna phase and group delays. |
| 报告类型： | 科技报告 |
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