GPS denial detection and reporting and mitigation
US11698461B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2020 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Jun 7, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method of identifying and responding to a GPS denial of service includes: configuring a mode S transponder for transmitting a GPS time-of-day message as a downlink format message using a BDS register, and configuring an aircraft surveillance system for receiving one or more GPS time-of-day messages transmitted as a downlink format message. The surveillance system compares the received time-of-day message(s) from the aircraft to a comparison time of day, and validates reception of authentic GPS signals by the aircraft when the received time-of-day message is within a threshold amount of the comparison time of day. The comparison time of day may be the GPS time of day of one of a plurality of aircraft in the surveillance volume or may be the GPS time of day determined by the aircraft surveillance system. An indicator on the transponder indicates counterfeit GPS signals, permitting mitigation od induced navigation error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.