Method for testing GNSS-based positioning systems in obstructed environments
US9377535B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2011 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Jul 25, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods of testing GNSS-based positioning systems in obstructed environments may include specifying a required accuracy threshold for use in determining a reference trajectory. One or more difficult areas of relatively poor or missing GNSS availability may be located within the obstructed environment. Positioning information may be established for first reference points outside the difficult areas. Subsequently, by surveying with respect to the first reference points, positioning information may be established for second reference points within the difficult areas. The first and second reference points may then be used to determine a true path associated with the reference trajectory. When an improved GNSS-based positioning system is navigated along the reference trajectory, a set of measured points may be gathered, and errors between the true path and a measured path (derived from the measured points) may thereby be evaluated with respect to statistical characteristics, or to other improved GNSS-based positioning systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.