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First built in 1995 as a modification of AN/TPQ-36A for search and track role in the Norwegian NASAMS air defense system, the Sentinel radar is deployed with forward area air defense units of the U.S. Army. Mounted on a towed platform, it can be positioned remotely from the rest of the unit.
SAASM does not provide any additional anti-jam capability, however, the higher data (chipping) rate of P(Y) code can provide a higher processing gain which will provide better tracking performance in a jamming environment. Future GPS upgrades, such as M-Code, will provide additional improvements to anti-jam capabilities. [citation needed]
The M-code is transmitted in the same L1 and L2 frequencies already in use by the previous military code, the P(Y)-code. The new signal is shaped to place most of its energy at the edges (away from the existing P(Y) and C/A carriers). It does not work at every satellite, and M-code was switched off for SVN62/PRN25 on 5 April 2011. [29]
Coarse-acquisition (C/A) and encrypted precision (P(Y)) codes, plus the L1 civilian and military (M) codes on Block III and newer satellites. L2: 1227.60 MHz: P(Y) code, plus the L2C and military codes on the Block IIR-M and newer satellites. L3: 1381.05 MHz: Used for nuclear detonation (NUDET) detection. L4: 1379.913 MHz
A counter-battery radar or weapon tracking radar is a radar system that detects artillery projectiles fired by one or more guns, howitzers, mortars or rocket launchers and, from their trajectories, locates the position on the ground of the weapon that fired it.
It is a satellite-based tracking and communicating system designed to provide command and control over distributed assets supporting and conducting theater operations. This system provides units with digital National Geospatial-Intelligence Agency maps, global positioning system ( GPS ) location data, and L-band (long band) satellite two-way ...
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