System and method for providing accurate position location information to military forces in a disadvantaged signal environment
US10591609B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2018 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Aug 27, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/9092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for determining a location in a disadvantaged signal environment includes three aerial vehicles hovering at high altitude and spaced apart to form a triangle, and a mother aerial vehicle positioned a distance away and at a lower altitude. The mother aerial vehicle acquires and transmits coarse geolocation information, using a pulse compression, high-power X Band radar and directional antenna, to each of the three aerial vehicles to direct them to coarse geo-positions above designated respective ground locations. One of the three aerial vehicles has a synthetic aperture radar for producing a terrain strip-map that is mensurated against a map database to provide fine position adjustments for each of the three aerial vehicles, which are also also configured to transmit a respective signal coded with its latitude, longitude, and altitude, for a computing device to perform time difference of arrival measurements of the signals to determine its location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.