The following is one of the five top submissions to the 2011 USA Challenge. The North American regional contest in the European Satellite Navigation Competition(ESNC) is a global search for the newest, best and most innovative GNSS application ideas with €20,000 in prize money for the international winner, the 2011 Galileo Master.
TRANM
The following is one of the five top submissions to the 2011 USA Challenge. The North American regional contest in the European Satellite Navigation Competition(ESNC) is a global search for the newest, best and most innovative GNSS application ideas with €20,000 in prize money for the international winner, the 2011 Galileo Master.
TRANM
TRANM is an innovative concept providing secure Time Reference Authentication for GNSS receivers. The operations of many infrastructures rely nowadays on GPS signals for network synchronisation. TRANM protects from jamming/spoofing/meaconing events that can induce network outage and severe economical losses to operators of infrastructures and services (telecom, energy/oil distribution, banking, etc.).
TRANM relies on the inherent differences of the data contained in the stream of the navigation messages signals received from different satellites of one (or more) GNSS constellations.
The PRN spread spectrum codes, though different for each SV, show cyclical repetitive patterns that are used for calculating user’s position. The PRN chip code is always the same through the SV lifetime. However the received navigation messages data streams evolve continuously in time as a function of the uploaded data, the position of the satellites and the position of the user.
TRANM compares the signals received from GNSS satellites with a reference provided by a control center that is continuously monitoring all navigation messages from all GNSS satellites in a constellation (i.e. GPS). From these records, the control center can calculate the corresponding combination of navigation messages on any point on the Earth at any instant and issues a “Unique Signature in 4 Dimensions” (US4D). This product is used as the reference to authenticate the received information at each location and for a given instant.
The method does not impose any requirement to the space segment nor to the ground segment of the GNSS system. The method can be implemented as an additional layer on top of the GNSS service and does not interfere with it (similarly to SBAS systems).
Thanks to GNSS and SBAS systems, Position, and Integrity are possible nowadays. With the introduction of TRANM a global and definitive PIA service will be available to GNSS users: Position, Integrity and Authentication, all in one.
WHO DID IT?
Antonio Pujante-Cuadrupani, PanamNav.com
Murcia, Spain
FOR MORE INFO
www.panamnav.com
project@panamnav.com
Learn about the other finalists:
