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Terrestrial Wideband Transmission System (TWTS)

Last Revised: January 17, 2017, 8:55 am
  • A tropospheric scatter microwave radio terminal array, or AN/TRC-170A, communicates with another array on the Foxtrot taxiway on MCAS Cherry Point, July 31. This radio can communicate 16 megabytes per second to another terminal up to 100 miles away. It can communicate directly, or by bouncing the beam off the atmosphere or mountains.
    A tropospheric scatter microwave radio terminal array, or AN/TRC-170A, communicates with another array on the Foxtrot taxiway on MCAS Cherry Point, July 31. This radio can communicate 16 megabytes per second to another terminal up to 100 miles away. It can communicate directly, or by bouncing the beam off the atmosphere or mountains.
Description: 

Terrestrial Wideband Transmission Systems (TWTS) is a capabilities portfolio of terrestrial based wideband transmission systems. The portfolio includes the AN/TRC-170A(V)3 and AN/TRC-170A(V)5 Beyond Line Of Sight (BLOS) Radio Systems, AN/MRC-142B and AN/MRC-142C Line Of Sight (LOS) Radio Systems, and Wireless Point- to-Point- Link version D (WPPL-D) LOS Wireless Cable Replacement (WCR) system. The AN/TRC-170A(V)3 and (V)5 are is a transportable BLOS, terrestrial, self-enclosed troposcatter terminals (multi-channel) capable of transmitting and receiving digital data over varying distances up to 100 miles. The AN/MRC-142B (ship to shore) and AN/MRC-142C variants to provide LOS, two-way, secure voice and data communications up to 35 miles. The WPPL-D is an integrated communications system consisting of Commercial Off-the-Shelf (COTS) radios, antennas, and Internet Protocol (IP) networking equipment that provides Non-secure IP Routing/ Network data connectivity,  Secure IP Routing Network data connectivity, voice, and video services. The Tactical Elevated Antenna Mast System (TEAMS) is a 34-meter telescopic mast system, extending support to various organic LOS systems (AN/MRC142C, EPLRS) by increasing operational reach by overcoming obstacles to communications.

Operational View: 
TWTS Operational View
Operational Impact: 

Provides the MAGTF with connectivity into the GIG, via Standardized Tactical Entry Point (STEP) sites/teleports; and connectivity for tactical circuit switched (i.e. Digital Switch Backbone); and packet switched data networks (i.e. Tactical Data Network (TDN), Transition Switch Module (TSM), Data Distribution System variants (DDS, DDS-M, DDS-R); and the Digital Technical Control (DTC)) within the MATGF. It is also used to establish connectivity between Joint Task Force Command Elements (CEs) and the Marine Expeditionary Force (MEF) CE; and internally between major subordinate commands (MSC) CEs (i.e. Ground Combat Element (GCE) and Aviation Combat Element (ACE)) of the MEF. Wireless LAN extension of NIPRNet, SIPRNet and voice services​.

Program Milestone Status: 

An Analysis of Alternatives (AoA) was conducted in FY13 and early FY14 to begin the process of identifying alternative candidate technology to meet future TWTS capability needs.  Signed 3QFY14, the AoA included and assessment of both Beyond Line Of Sight (BLOS), Line of Sight (LOS), and Wireless Cable Replacement (WCR) (LOS) capability gaps with focus on evaluating multiple alternative solutions.  HQMC CD&I is developing a Capability Design Document (CDD) to guide portfolio modernization.

In 2QFY16 HQMC CD&I and MCSC conducted a Deep Dive to support the acquisition stratgey for Next Generation Troposcatter (NGT)  capability to replace the aging AN/TRC-170A FoS.  The Marine Corps and Army will work in collaboration utilizing the Army Capability Production Design CPD and leverage a combined Army led contract vehicle in support of Better-Buying Power 3.0. Initial Itergrated product Groups are being dfined and schedules are being addressed, with fielding starting in FY20.  

AN/MRC-142 FoS:  AN/MRC-142 FoS is in the Operations and Support Phase.  An Engineering Change Proposal (ECP) is currently underway for the AN/MRC-142C to transition the system to Everything over Internet Protocol (EoIP).  The change removes obsolete component subsystems and provides direct IP connectivity of the transceiver to Data Distribution System Modular (DDS-M) components.  The effort is identified as an AAP; the scope of the effort includes acquisition of an IP cable interface for DDS-M and IP retrans cable to maintain the system's Tactical Radio Relay function.  Modification kit Fielding is expected to occur in 3QFY17. 

AN/TRC-170A FoS:  AN/TRC-170A FoS is in the Operations and Support Phase.

Wireless Point to Point Link Version D (WPPL-D):  WPPL-D is in the Operations and Support Phase.

Tactical Elevated Antenna Mast System (TEAMS):  TEAMS is in the Operations and Support Phase.

Program Procurement: 
IOC FY92 (AN/TRC-170) 3QFY01 (AN/MRC-142B) FY08 (WPPL-D) FY08 (TEAMS) 1QFY11 (AN/MRC-142C) 3QFY17 (AN/MRC-142C EOIP) FY21 (NGT) FOC FY95 (AN/TRC-170) 1QFY02 (AN/MRC-142B) FY12 (WPPL-D) FY12 (TEAMS) 3QFY12 (AN/MRC-142C) 1QFY18 (AN/MRC-142C EOIP) TBD (NGT)

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