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TACSAT 4

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TACSAT 4 is classified as:


NORAD ID: 37818
Int'l Code: 2011-052A
Perigee: 537.6 km
Apogee: 12,229.1 km
Inclination: 63.2 °
Period: 238.9 minutes
Semi major axis: 12754 km
RCS: 5.2451 m2 (large)
Launch date: September 27, 2011
Source: United States (US)
Launch site: Kodiak Island, Alaska (KODAK)

TACSAT 4 is a U.S. Navy satellite flying in a unique, gravitationally-stable orbit ranging from 400 miles (644 km) high to more than 7,300 miles (11,748 km) in altitude. From that orbit, the craft's UHF communications package will connect military units via radio. The satellite was developed under the auspices of the military's Operationally Responsive Space office, which was chartered to investigate and fly less costly niche missions designed to serve tactical needs. TacSat 4 flies three times closer to Earth than traditional military communications satellites, meaning users on the ground have nine times the signal strength compared to legacy systems in higher orbits.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 37818U 11052A   19047.64307486 +.00000540 +00000-0 +93596-3 0  9999
2 37818 063.1998 088.7007 4583333 219.2867 334.3014 06.02717210162574
Source of the keplerian elements: AFSPC