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TacSat-4
TacSat-4 is the fourth in a series of U.S. military experimental reconnaissance and communication satellites. The Naval Research Laboratory (NRL) is the program manager. The Office of Naval Research (ONR) sponsored the development of the payload and funded the first year of operations. The Office of the Director of Defense Research and Engineering (DDR&E) funded the standardized spacecraft bus and the Operationally Responsive Space Office (ORS) funded the launch that will be performed by the Air Force’s Space and Missile Systems Center (SMC).
The spacecraft was completed by the end of 2009, and was launched on September 27, 2011, on a Minotaur IV rocket into a highly elliptical orbit.
==Mission==
TacSat-4 is equipped with a antenna operating 10 Ultra High Frequency (UHF) channels that can be used for any combination of communications, data ex-filtration or Blue Force Tracking (BFT). TacSat-4 will fly the highly elliptical, 4-hour, orbit (12,050 kilometers at peak) providing typical payload communication periods of two hours per orbit. TacSat-4’s orbit also allows it to cover the high latitudes.
Part of its capability is rapid (within 24 hours) reallocation to different theaters worldwide, in support of unexpected operations. Command and control of TacSat-4 will be performed at the NRL Satellite Operations Center at Blossom Point, Maryland. Payload tasking will be performed via the SIPRNet based Virtual Mission Operations Center (VMOC).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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