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Ground Mobile Forces (GMF) is the term given to the tactical SATCOM portion of the Joint Service program called TRI-TAC developed by GTE-Sylvania in the mid-1970s. The Tri-Service Tactical signal system is a tactical command, control, and communications program. It is a joint service effort to develop and field advanced tactical and multichannel switched communications equipment. The program was conceived to achieve interoperability between service tactical communications systems, establish interoperability with strategic communications systems, take advantage of advances in technology, and eliminate duplication in service acquisitions.[1]
GMF is configured in a hub-spoke arrangement with the hub terminal being able to ingest four feeds from the outlying spoke terminals. Of the four designated GMF terminals, the AN/TSC-85B and AN/TSC-100A are equipped for point-to-point or hub operations and the AN/TSC-93B and AN/TSC-94A are spoke terminals.
The 85B/100A hubs are capable of ingesting up to 48 multiplexed and encrypted channels from a maximum of four spoke terminals simultaneously, but can double that capability with an external multiplexer (96 channels). Each channel is configured for 16 or 32kbit/s, which with overhead translates to 48kbit/s true capacity. The 93B/94A terminals have a capacity of 24 16/32kbit/s multiplexed channels. All of the GMF terminals have external connections for an AN/TSQ-111 Tech Control Facility, field phones, or a 70MHz IF wideband input, plus are sealed for sustained operations in a chemical/biological/radiological (CBR) environment.
GMF communicates via Super High Frequency (SHF) X-band Defense Satellite Communication System (DSCS) satellites.[2] The 85B/100A hub terminals typically use a 20 feet (6.1 m). Quick Reaction Satellite Antenna Group (QRSAG) antenna, while the outlying spoke terminals rely on an 8 feet (2.4 m) parabolic dish antenna.[3]
ObsolescenceEdit
Today, much of the TRI-TAC and GMF equipment is obsolete – its bulky circuit-switched equipment having been replaced in the last decade by fly-away quad-band systems containing compact IP-based routers, switches, and encryption equipment. There are, however, a number of GMF terminals still supporting active forces in the extreme operating conditions of Iraq and Afghanistan.
ReferencesEdit
^Pike, John (7 July 2011). "AN/TTC-39 TRI-TAC Automatic Telephone Central Office". GlobalSecurity.org. from the original on 24 August 2021. Retrieved 26 August 2022.
^Pike, John (21 July 2011). "DSCS-3". GlobalSecurity.org. from the original on 25 August 2021. Retrieved 26 August 2022.
^Pike, John (21 July 2011). "AN/TSC-85B". GlobalSecurity.org. from the original on 24 August 2021. Retrieved 26 August 2022.
Further readingEdit
Carestio, R.; McLeskey, F.; Coyle, D. (16 June 1986). An Analysis of Planned Army Ground Mobile Forces (GMF) Satellite Use in Support in Mobile Subscriber Equipment (PDF) (Report). M/A-COM Government Systems, Inc. (PDF) from the original on 26 August 2022. Retrieved 26 August 2022 – via Defense Technical Information Center.
ground, mobile, forces, this, article, multiple, issues, please, help, improve, discuss, these, issues, talk, page, learn, when, remove, these, template, messages, this, article, relies, largely, entirely, single, source, relevant, discussion, found, talk, pag. This article has multiple issues Please help improve it or discuss these issues on the talk page Learn how and when to remove these template messages This article relies largely or entirely on a single source Relevant discussion may be found on the talk page Please help improve this article by introducing citations to additional sources Find sources Ground Mobile Forces news newspapers books scholar JSTOR April 2009 This article includes a list of general references but it lacks sufficient corresponding inline citations Please help to improve this article by introducing more precise citations April 2009 Learn how and when to remove this template message Learn how and when to remove this template message Ground Mobile Forces GMF is the term given to the tactical SATCOM portion of the Joint Service program called TRI TAC developed by GTE Sylvania in the mid 1970s The Tri Service Tactical signal system is a tactical command control and communications program It is a joint service effort to develop and field advanced tactical and multichannel switched communications equipment The program was conceived to achieve interoperability between service tactical communications systems establish interoperability with strategic communications systems take advantage of advances in technology and eliminate duplication in service acquisitions 1 Contents 1 Specifications 2 Obsolescence 3 References 4 Further readingSpecifications EditGMF is configured in a hub spoke arrangement with the hub terminal being able to ingest four feeds from the outlying spoke terminals Of the four designated GMF terminals the AN TSC 85B and AN TSC 100A are equipped for point to point or hub operations and the AN TSC 93B and AN TSC 94A are spoke terminals The 85B 100A hubs are capable of ingesting up to 48 multiplexed and encrypted channels from a maximum of four spoke terminals simultaneously but can double that capability with an external multiplexer 96 channels Each channel is configured for 16 or 32kbit s which with overhead translates to 48kbit s true capacity The 93B 94A terminals have a capacity of 24 16 32kbit s multiplexed channels All of the GMF terminals have external connections for an AN TSQ 111 Tech Control Facility field phones or a 70 MHz IF wideband input plus are sealed for sustained operations in a chemical biological radiological CBR environment GMF communicates via Super High Frequency SHF X band Defense Satellite Communication System DSCS satellites 2 The 85B 100A hub terminals typically use a 20 feet 6 1 m Quick Reaction Satellite Antenna Group QRSAG antenna while the outlying spoke terminals rely on an 8 feet 2 4 m parabolic dish antenna 3 Obsolescence EditToday much of the TRI TAC and GMF equipment is obsolete its bulky circuit switched equipment having been replaced in the last decade by fly away quad band systems containing compact IP based routers switches and encryption equipment There are however a number of GMF terminals still supporting active forces in the extreme operating conditions of Iraq and Afghanistan References Edit Pike John 7 July 2011 AN TTC 39 TRI TAC Automatic Telephone Central Office GlobalSecurity org Archived from the original on 24 August 2021 Retrieved 26 August 2022 Pike John 21 July 2011 DSCS 3 GlobalSecurity org Archived from the original on 25 August 2021 Retrieved 26 August 2022 Pike John 21 July 2011 AN TSC 85B GlobalSecurity org Archived from the original on 24 August 2021 Retrieved 26 August 2022 Further reading EditCarestio R McLeskey F Coyle D 16 June 1986 An Analysis of Planned Army Ground Mobile Forces GMF Satellite Use in Support in Mobile Subscriber Equipment PDF Report M A COM Government Systems Inc Archived PDF from the original on 26 August 2022 Retrieved 26 August 2022 via Defense Technical Information Center Shively Robert G 15 April 1993 Updating The Joint Common User Communications Architecture A Case For The Army s View PDF United States Army War College Report Carlisle Barracks Pennsylvania ADA263904 Archived from the original PDF on 1 March 2021 Retrieved 24 August 2022 via Defense Technical Information Center Retrieved from https en wikipedia org w index php title Ground Mobile Forces amp oldid 1132842938, wikipedia, wiki, book, books, library,
