8.6.5 — Infrastructure Threat Monitoring — maturity: live

Industrial Site Perimeter Monitoring

Continuous satellite surveillance of refineries, chemical plants, nuclear facilities and heavy industrial sites to detect unauthorised access, perimeter breaches and suspicious activity before ground security can respond.

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High-value industrial sites — refineries, LNG terminals, chemical complexes, nuclear plants — present an asymmetric security problem: the perimeter is vast, the consequence of a breach is catastrophic, and ground patrols cannot achieve continuous coverage of every access vector simultaneously. Adversaries exploit exactly this gap, using gaps between patrol cycles or fence-line blind spots to pre-position threats, conduct reconnaissance or insert personnel. Sovereign satellite monitoring closes that temporal gap by delivering sub-metre optical imagery and synthetic aperture radar passes on a revisit cadence calibrated to the threat level of each facility.

A constellation combining optical and SAR payloads gives security planners an all-weather, day-night picture of every classified industrial perimeter. SAR coherent change detection flags even subtle ground disturbance — a newly cut fence, freshly disturbed earth near a pipeline entry, vehicles parked in unusual patterns — while optical confirms and provides human-readable evidence for legal proceedings. RF survey payloads add a further layer, detecting unauthorised radio transmitters, drone control links and cellular anomalies that precede coordinated attacks.

The operational outcome is a persistent, tamper-proof audit trail of every industrial perimeter under national jurisdiction, delivered to a security fusion centre in near-real-time. When a commercial imagery vendor is in the loop, that audit trail is theirs as much as yours — tasking priorities, archive access and data retention policies are set by a foreign board, not by the national security authority. A sovereign constellation removes that dependency entirely, letting the state define classification levels, access controls and escalation protocols without negotiation.

What matters

A single successful attack on a refinery or chemical plant can generate mass-casualty events, economic damage in the billions and months of supply disruption — timely perimeter intelligence is a direct life-safety asset.
Coherent change detection on repeat-pass SAR can resolve ground disturbance at 20–30cm scale, catching pre-attack site preparation that optical alone would miss.
Commercial tasking agreements give vendors prior knowledge of which sites a government considers highest priority — that information has intelligence value to an adversary.
National critical infrastructure registers are typically classified; routing imagery requests through a foreign platform exposes the list of protected sites to a non-sovereign entity.

Sovereignty score: 9/10 — A nation that outsources satellite surveillance of its most dangerous industrial sites to a foreign commercial provider has effectively handed an adversary a roadmap of its highest-consequence vulnerabilities and the gaps in its coverage schedule.

Tasking logs held by a commercial vendor reveal which facilities a government treats as highest priority — intelligence of direct value to state and non-state adversaries planning infrastructure attacks.
Export-control and foreign-ownership clauses in commercial imagery contracts can restrict or revoke access during precisely the escalatory periods — geopolitical crises, sanctions regimes, armed conflict — when perimeter monitoring of nuclear and chemical facilities is most critical.
National critical infrastructure registers are classified in most jurisdictions; submitting site coordinates to a foreign platform for routine tasking is an ongoing, inadvertent disclosure of that register.
Sovereign operation allows the state to define data retention periods, access tiers and classification labels without contractual negotiation, ensuring the imagery audit trail is legally admissible and operationally controlled under national security law.

Reference architecture

Payload: Dual-mode: (1) X-band SAR, 0.5m spotlight resolution, 20km swath, coherent change detection mode for repeat-pass perimeter comparison; (2) EO optical, 0.5m panchromatic / 2m multispectral, 12km swath; optional third payload: RF survey 400 MHz to 6 GHz for drone control-link and unauthorised transmitter detection within 2km of facility perimeter
Bus class: ESPA-class microsat, 150–200kg, 600W payload power, 3-axis stabilised with <0.05° pointing knowledge for SAR phase stability; optical and RF payloads on a smaller 16U cubesat secondary bus to maximise constellation density on budget
Orbit: Sun-synchronous LEO at 480–530km altitude; 18-satellite mixed constellation (6 SAR microsats + 12 EO/RF cubesats) in a Walker Delta 97.5° inclination; target revisit of <90 minutes over any designated facility, configurable to <45 minutes with orbit-raise manoeuvres for high-alert sites
Ground segment: 4-station national ground network (X-band downlink for SAR, S-band TT&C); stations co-located with existing national defence radar sites to minimise civil engineering cost; encrypted command uplink with hardware security module; SatNOGS-compatible UHF beacon for housekeeping backup
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References

IAEA Nuclear Security Series No. 27-G: Physical Protection of Nuclear Material and Nuclear Facilities — The IAEA's guidance on physical protection of nuclear facilities requires continuous detection of unauthorised access across all facility perimeters. It explicitly endorses layered surveillance technologies, including remote sensing, to complement ground-based measures.
UNEP: Industrial Accident Prevention and Preparedness — UNEP documents how deliberate interference at chemical and petrochemical facilities can trigger cascading environmental disasters. Early perimeter intrusion detection is identified as a primary mitigation measure.
ESA: SAR Coherent Change Detection Applications — ESA's Sentinel-1 programme demonstrates that repeat-pass SAR coherent change detection reliably identifies subtle ground and structural changes at sub-30cm scale, making it directly applicable to perimeter security monitoring of fixed industrial sites.
ICEYE: Persistent Monitoring Use Cases — ICEYE's commercial SAR constellation is already used for persistent monitoring of sensitive sites, demonstrating the technical readiness of microsatellite SAR for industrial perimeter applications at sub-metre resolution.
European Union Agency for Cybersecurity (ENISA): Critical Infrastructure Protection — ENISA's critical infrastructure protection framework identifies physical perimeter security as a first-order control for operators of essential services, with emerging guidance incorporating space-based surveillance as a complementary detection layer.