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

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)

effects-based operations (EBO)

Ground Based Air Defenses (GBAD)