Method of positioning perspective terrain on SVS primary flight displays using terrain database and radio altitude
US7715978B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2007 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Mar 8, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G5/74
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention is directed to a method of positioning perspective terrain on a SVS (Synthetic Vision System) based on a navigation solution, the vertical component of which is calculated utilizing a terrain database and sensing unit (which provides height above terrain). The terrain database provides elevation of terrain above MSL. A sensor, such as a GNSS sensor, may be utilized to calculate the navigation solution. In alternative embodiments, the navigation solution is calculated differently based upon the phase of flight. In one, the vertical component calculation utilizes the sensing unit at or below the sensing unit's rated altitude. In another, vertical component calculation blends the sensing unit with the sensor. The blending may be based upon percentages based upon altitude or utilize filtering such as Kalman filtering. The present invention is particularly advantageous for close to ground operations, insuring perspective terrain will stay consistent with the real world.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.