MIL-STD-188-164 Interoperability Of Shf Satellite Communications TerminalsThis standard establishes mandatory Radio Frequency/Intermediate Frequency RF/IF and associated interface requirements applicable to Satellite Communications SATCOM Earth Terminals ET operating over military X-band and Ka-band Super High Frequency SHF channels. Military unique requirements for ET that may operate over commercial C-band, Ku-band, and Ka-band are included. Equipment developers may exceed the requirements herein to satisfy specific program requirements, provided that interoperability is maintained. Thus, incorporating additional standard and nonstandard capabilities and interfaces is not precluded. Existing SHF SATCOM terminals need not conform to this MIL-STD unless they undergo a modernization program.

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MIL-STD-188-164B

SOTM           satellite communications on-the-move

SOW            statement of work

SSE            SATCOM systems expert

STANAG         standardization agreement (NATO) Tx             transmit

UAV            unmanned aerial vehicle

VSWR           voltage standing wave ratio

WGS            Wideband Global SATCOM

3.3 Antenna tracking.  Denotes when an antenna system is actively measuring a RF source for the purpose of optimally positioning the antenna to point its electrical boresight towards the RF source.  This type of antenna control is also referred to as closed-loop pointing.

3.4 Earth terminal (ET).  The portion of a satellite system that receives and transmits RF signals to and from a satellite. The earth terminal is delimited by the IF interface to the modem and the RF air interface including radome (if used).  All earth terminal and antenna specifications must be met with radome performance included.  For some requirements, modem

functionality is included.

3.5 Effective isotropically radiated power (EIRP).  The product of the power supplied to an antenna and its gain relative to a hypothetical antenna that radiates or receives equally in all directions.

3.6 EIRP spectral density (ESD). ESD is calculated as

EIRP/symbol rate.

3.7 Equivalent Diameter.  For non-circular apertures, the equivalent diameter (De) may be computed by:

Where A = Aperture Area

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