MIL-STD-188/187 (NOTICE-1), DEPARTMENT OF DEFENSE INTERFACE STANDARD: INTEROPERABILITY STANDARD FOR MOBILE USER OBJECTIVE SYSTEM (MUOS) TERMINALS (31-AUG-2016)
MIL-STD-188/187 (NOTICE-1), DEPARTMENT OF DEFENSE
INTERFACE STANDARD: INTEROPERABILITY STANDARD
FOR MOBILE USER OBJECTIVE SYSTEM (MUOS) TERMINALS (31-AUG-2016)., MIL-STD-188-187 dated 19 December 2014 is authorized only to the Department of Defense
and U.S DoD contractors use only (NOFORN). The document contains technical standards and
design objectives for use by all Military Departments and Agencies in their systems requiring
space/ground communications operating in the UHF frequency band. Other requests should be
referred to: DISA, IE5 - Attn: MIL-STD-188-187, P.O. Box 549, Fort Meade, MD 20755-0549.
MIL-STD-188-187 was approved for use by the Department of Defense on 19 December 2014.
Substantial changes to this standard are pending. These pending changes have been recorded in
Errata sheets. These Errata sheets as well as other MUOS program documentation referenced
within MIL-STD-188-187 are accessible on the MUOS Information Repository (IR) within the
Joint Tactical Networking Center (JTNC) Developmental IR. Access to the JTNC
Developmental IR requires users to register for an IR account through the IR Registration web
site. JTNC Development IR registration information can be found at
This standard establishes mandatory requirements applicable to Satellite Communications (SATCOM) terminals required to access 5-megahertz (MHz) ultra-high frequency (UHF) SATCOM channels using the Mobile User Objective System (MUOS) Common Air Interface (CAI). Terminals that meet these mandatory requirements are referred to as MUOS Terminals (MT). The code-division multiple-access (CDMA) frame structure, timing requirements, and protocols for accessing overhead and ground segment services are defined herein and represent the minimum requirements that must be implemented. Requirements in this standard may be exceeded by equipment developers to satisfy specific Department of Defense (DoD) requirements, provided interoperability is maintained. For example, the incorporation of additional standard and nonstandard interfaces is not precluded. Chairman Joint Chiefs of Staff Instruction (CJCSI) 6251 complements this standard by defining the processes and requirements necessary to certify an MT for operational use.