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Space domain awareness is the study and monitoring of satellitesorbiting theEarth. It involves the detection, tracking, cataloging and identification of artificial objects, i.e. active/inactivesatellites, spentrocket bodies, orfragmentation debris.

Space domain awareness accomplishes the following:

• Predicting when and where a decaying space object willre-enter theEarth's atmosphere;
• Preventing a returning space object, which toradar looks like a missile, from triggering afalse alarm in missile-attack warning sensors;^[1]
• Charting the present position of space objects and plot their anticipated orbital paths;
• Detecting new human-made objects in space;
• Producing a running catalogue of human-made space objects;
• Determining which country owns a re-entering space object;^[1]
• Informing countries whether or not objects may interfere withsatellites andInternational Space Station orbits;
• Providing data for futureanti-satellite weapons systems.

Systems include:

• The DEEP-Sight prototype, designed by Deepinder Uppal on behalf of the Defense Innovation Unit, this system is designed to provide space domain awareness across a broad-spectrum of SDA use cases to Space Force, the United States Navy and PSRA (Public Satellite Research and Analysis) teams.^[2]
• TheUnited States Space Surveillance Network which has detectors such as theSpace Fence (replacing the now defunctAir Force Space Surveillance System) andSpace Surveillance Telescope^[1]
• The RussianCentre for Outer Space Monitoring with facilities such asOkno andKrona andSazhen-S, used to analyse the orbital parameters of space craft.
• The FrenchGRAVES (Grand Réseau Adapté à la Veille Spatiale)bi-static radar-based space surveillance system deploy by French Air Force
• The EuropeanSpace Situational Awareness Programme with multiple assets in itsSpace Surveillance and Tracking Segment
• The Australian based Silentium Defence Oculuspassive radar space observatory inSwan Reach, South Australia^[3]
• The AmericanNational Reconnaissance Office'sSilentbarker satellites^[4]

• United States Space Surveillance

• Space technology
• Surveillance
• Space debris

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