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Unlike commercial Global Positioning System (GPS) receivers, military GPS or Global Navigation Satellite System (GNSS) receivers deliver more secure, Selective Availability Anti-Spoofing Module (SAASM)-based GPS in the most reliable handheld form available.
A SAASM system allows over-the-air rekeying, satellite verification, and contingency recovery, as well as the ability to be updated with an encrypted “Black Key” that can be transmitted over open channels.
In order to get better tracking performance in jamming applications, a higher data rate of the P(Y) code (an encrypted precision code) is needed.
To prevent analysis of its internal operations, SAASM hardware is usually covered with an anti-tampering coating.
Military GPS receivers offer benefits such as protection from jamming and spoofing using SAASM and dual-frequency encrypted signals. This type of receiver can be integrated into a vehicle or simply used as a handheld device.
It goes without saying that security is vital in military applications, and therefore GPS upgrades, such as the latest M-Code, must provide additional improvements to anti-jam capabilities.