Navy Multiband Terminal Paper

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  • Topic: Communications satellite, Navy, Satellite
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  • Published : October 10, 2012
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Bryan Boggs
MN 3331
Program Acquisition Report – Navy Multiband Terminal
The Navy Multiband Terminal (NMT) Program is the next generation maritime military satellite communications terminal. The NMT Program is the required Navy component to the Advanced Extremely High Frequency (AEHF) Program for enhancing protected and survivable satellite communications to Naval forces. NMT multiband communication capabilities will communicate via two way Ka-Band on Wideband Global Satellite Communication (SATCOM) (WGS) and shipboard and submarine terminals to communicate with X-Band using the Defense Satellite Communications System (DSCS) and WGS. NMT will operate in the Extremely High Frequency (EHF)/AEHF Low Data Rate (LDR), Medium Data Rate (MDR), and Extended Data Rate (XDR) communication modes and will sustain the Military Satellite Communication (MILSATCOM) architecture by providing connectivity across the spectrum of mission areas to include land, air and naval warfare, special operations, strategic nuclear operations, strategic defense, theater missile defense, and space operations and intelligence (1). The NMT system will replenish and improve on the capabilities of both the Military Strategic and Tactical Relay (MILSTAR) system and WGS system by equipping the warfighters with assured, jam resistant, secure communications. The AEHF system will provide crosslinks within the constellation as well as between AEHF satellites and MILSTAR satellites in the backwards-compatible mode. Mission requirements specific to Navy operations, including threat levels and scenarios, are contained in the AEHF ORD. NMT will be a FORCEnet enabler by providing critical protected bandwidth for war fighter information services (3). The NMT is the fourth iteration Navy EHF terminal being designed to communicate with the AEHF satellites, as well as existing EHF on-orbit capable satellites. The NMT is designed to replace existing submarine and shipboard SATCOM terminals with a single terminal, reducing the space and complexity of on-board antenna systems. The NMT system provides an increase in single service capability, increases the number of coverage areas and retains Anti-Jam/Low Probability of Intercept (AJ/LPI) protection characteristics. During performance verification tests NMT capabilities demonstrated included both network and point-to-point communications at data rates up to 8.2 Mbit/sec; nanosecond timing of antenna handovers under harsh at-sea conditions; and the validation that the system operates on polar-inclined orbit satellites to provide full global connectivity for naval platforms (2). The system is capable of maintaining connectivity in weather conditions up to Sea State 6.There are three variants: terminals for shore stations, surface platforms and submarines. The surface platform variant has either a 1.5 or a 3m dish antenna, depending on the size of the platform. The below-deck equipment fits in a single cabinet. For submarines the equipment will interface with existing mast and periscope antennas. Raytheon is also exploring the possibility of producing a non-EHF variant. NMT will provide deployed Naval Commanders with secure, protected, command, control and communications capabilities and will support the exchange of tactical data, imagery, real-time video, battlefield maps and targeting information. The NMT will provide physical and electromagnetic survivability, resistance to jamming and Electromagnetic Interference (EMI), and Low Probability of Intercept (LPI)/Low Probability of Detection (LPD) capabilities against current and projected threats (1). NMT is an advanced software architecture that will allow the U.S. Navy to substantially increase bandwidth and data throughput of its satellite communications systems, and serve as a bridge to the next generation capabilities. It is anticipated that the NMT, with minor modifications, will also be able to communicate with the future Transformational Satellites (TSAT), in support of...
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