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Modernized
GPS
IIR-M Satellite
Lockheed Martin
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The GPS IIR-M spacecraft offer a variety of enhanced
features for GPS users, such as a modernized antenna panel that
provides increased signal power to receivers on the ground, two new
military signals for improved accuracy, enhanced encryption and
anti-jamming capabilities for the military, and a second civil
signal that will provide users with an open access signal on a
different frequency. The Global Positioning System enables properly
equipped users to determine precise time and velocity and worldwide
latitude, longitude and altitude to within a few meters.
The second satellite was launched on
Sept 25, 2006.
It will join the first modernized IIR
satellite, GPS IIR-14(M), successfully launched and declared
operational last year and 12 other operational Block IIR satellites
currently on-orbit within the overall 29-spacecraft constellation.
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