GPS upgrades tested on simulator. (Tech Talk).Military users of the Global Positioning System Global Positioning System: see navigation satellite.
Global Positioning System (GPS)
Precise satellite-based navigation and location system originally developed for U.S. military use. satellite constellation A group of electronic satellites working in concert is known as a satellite constellation. Such a constellation can be considered to be a number of satellites with coordinated ground coverage, operating together under shared control, synchronised so that they overlap well in simulator will be able to test the performance of the new GPS receivers' anti-tampering mechanism.
The Interstate Electronics Corporation designed an upgrade kit for the simulator, so it can be used to test the so-called SAASM SAASM Selective Availability Anti-Spoofing Module
SAASM Selective Availability Anti-Spoofing Module (US DoD GPS system) (selective availability A function in the GPS navigation system that deliberately introduced random errors for civilian GPS receivers. It was implemented to prevent enemy troops on foreign soil from using the GPS system to their advantage, while allowing friendly troops to obtain the true signals in GPS anti-spoofing module) GPS military receivers, which make them tamper-proof. In order to test the new, classified features of SAASM based receivers, while retaining the ability to test older receivers, users must first receive the proper data from the U.S. GPS Joint Program Office.
The GPS constellation simulator, called the SCS 2450, is among the most advanced systems available today to test and evaluate the performance of GPS-based military technology.