High Accuracy-Nationwide Differential Global Positioning System Test and Analysis Phase II Report

The High Accuracy-Nationwide Differential Global Positioning System (HA-NDGPS) program focused on the development of compression and broadcast techniques to provide users over a large area with very accurate radio navigation solutions. The goal was to achieve 0 cm in real time over 322 km baselines. The focus of the Phase II effort was on several aspects of HA-NDGPS to refine the navigation solution and demonstrate its usefulness. To that end this report provides a description and analysis of these tasks as well as conclusions reached. The tasks include: provide a basic examination of the utility of using data from two reference stations; develop and implement a prebroadcast integrity algorithm; develop interface software for various brands of GPS receivers; rewrite the modular software; evaluate lower baud rate messages more than once every epoch; demonstrate driver analysis based on the HA-NDGPS navigation solution; and examine multipath noise levels at the Hagerstown, MD facility. The approaches and results provided in this report offer significant insight into the success of the overall HA-NDGPS program and its approach to meeting the needs of many users.


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Figures; Photos; Tables;
  • Pagination: 47p

Subject/Index Terms

Filing Info

  • Accession Number: 01003472
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-HRT-05-034
  • Contract Numbers: DTFH61-03-P-00146
  • Files: TRIS, USDOT
  • Created Date: Aug 30 2005 3:50PM