surveillance

Definition/Scope: The systematic observation of aerospace, surface, or subsurface areas, places, persons, or things, by visual, aural, electronic, photographic, or other means.

Use:

Foreign Intelligence Surveillance Act

Broader Terms:

Force Protection Airborne Surveillance System
M93 NBC Reconnaissance System
MQ-8B Fire Scout
observation (intelligence)
Over-the-Horizon Airborne Sensor Information System
Unattended Ground Sensor
unmanned ground sensor
USA Patriot Act of 2001

Narrower Terms:

acoustic surveillance
air surveillance
battlefield surveillance
coastal surveillance
constant surveillance
countersurveillance
electronic surveillance
long range surveillance
maritime surveillance
missile warning and space surveillance
ocean surveillance

Related Terms:

depot surveillance records
Ground-Based Electro-Optical Deep Space Surveillance
Integrated Processing Facility
intelligence collection
Intelligence, Surveillance and Reconnaissance
Intelligence, Surveillance and Reconnaissance Synchronization
Joint Surveillance Target Attack Radar System
reconnaissance
sensor
surveillance drones