space-based observing system

multi-national space-based imaging system (for surveillance) (MUSIS)

space-based data

aerodrome meteorological observing systems study group

observing ammunition

observing angle

observing detail

observing interval

observing line

observing point

observing sector

observing station

computer-based fire control system

land-based missile system

land-based mobile missile system

satellite-based communications system (SATCOM)

forward-based aircraft system

Guidelines for Realizing Early Benefits from Existing Satellite-Based Navigation System

earth-based coordinate system

vision-based system

ground-based air defense system

based on unit system setting

in either feet or metre based on unit system setting

space system

space nuclear power system

Space System for Tracking Ships and Aircraft in Distress – Search and Rescue Satellite (COSPAS-SARSAT)

air-based

air-based missile

airborne based sense and avoid (ABSAA)

capabilities-based approach

capability-based assessment (CBA)

carrier-based

early warning ground-based radar (EW GBR)