Why can't we simply purchase imagery from Planet, ICEYE, or Capella instead of building our own system?

Commercial providers operate under the export regulations and political priorities of their home country. The United States, for example, can invoke national-security 'shutter control' provisions — a power codified in the Land Remote Sensing Policy Act — and direct providers to withhold imagery of specified regions. A sovereign constellation carries no such off-switch, ensuring that surveillance of politically sensitive sites continues even during crises when commercial access is most likely to be withdrawn.

What orbits and sensor types are best suited for nuclear facility surveillance?

A dual-layer architecture works best: a SAR microsatellite constellation in LEO (~500–550 km) for all-weather, day-night structural monitoring, and a thermal infrared (TIR) microsatellite layer for coolant and heat-anomaly detection. GEO is unsuitable for the spatial resolution required. A minimum viable sovereign constellation would be six SAR satellites paired with four TIR satellites, delivering sub-90-minute revisit over priority sites.

How does satellite surveillance complement IAEA safeguards inspections?

IAEA inspectors are the authoritative ground-truth mechanism under INFCIRC/153, but inspection frequency is limited and access can be delayed or denied. Satellite surveillance provides a continuous, independent record of physical changes — new construction, vehicle patterns, cooling-tower activity — that can trigger inspector requests or support safeguards evidence analysis. The IAEA's own imagery analysis cell uses commercial satellite data; a sovereign system adds a national layer that feeds domestic security assessments without dependence on IAEA scheduling.

What resolution is needed to detect meaningful activity at a nuclear facility?

Structural change detection (new buildings, earthworks, berms) is reliable at 1–3 m resolution. Vehicle and equipment identification requires 0.5 m or better. Detecting coolant-discharge anomalies through thermal imaging requires a noise-equivalent differential temperature (NEDT) of 0.1 °C or finer. Modern commercial SAR microsatellites such as ICEYE's X-series achieve 0.5 m in spotlight mode, while Capella's Acadia sensor reaches 0.25 m, setting a reasonable performance target for a sovereign instrument.

What is the regulatory framework for imaging another country's nuclear facilities from space?

Space-based remote sensing is governed by the ITU Radio Regulations and national licensing frameworks; there is no international law that prohibits imaging sovereign territory from orbit — the principle of 'freedom of space' established under the 1967 Outer Space Treaty applies. However, domestic export-control regimes (US EAR/ITAR, EU dual-use regulations) govern what imagery products and satellite components can be transferred internationally, adding procurement complexity for states sourcing foreign components.

How does change-detection AI improve nuclear surveillance over raw imagery analysis?

Machine learning change-detection algorithms — trained on multi-temporal SAR and optical stacks — can flag pixel-level differences in minutes rather than the hours required for manual review, and can process the entire facility perimeter rather than selected areas. Sovereign algorithms, trained on classified reference datasets and run on domestic infrastructure, avoid the intelligence-exposure risk of uploading sensitive imagery to foreign cloud processors. Organisations such as ESA's Phi-Lab and NASA Harvest demonstrate the production-readiness of this approach in adjacent domains.

How long does it realistically take to deploy a sovereign nuclear-surveillance constellation?

A realistic timeline from programme authorisation to initial operational capability — assuming commercial off-the-shelf microsatellite buses, procured launch services, and an existing ground station network — is 36 to 48 months for a first tranche of four to six satellites. Full operational capability across a twelve-satellite dual-sensor constellation is more typically a five-to-seven-year programme. Nations without an established space industrial base should budget an additional 12–18 months for supply-chain qualification.

What cybersecurity standards apply to the ground segment handling nuclear-site imagery?

Ground segments processing nuclear-facility intelligence should comply with NIST SP 800-53 (Security and Privacy Controls for Information Systems) at a High baseline, and with national nuclear-security regulations that implement IAEA NSS-20 physical-protection recommendations. Data links from satellite to ground must use end-to-end encryption consistent with CCSDS 352.0-B-2 (Space Data Link Security Protocol). Isolated air-gapped processing environments are best practice for the most sensitive analytical workflows.

8.7.1Live

Nuclear Facility Surveillance

Security guard watching multiple screens in a nuclear plant control room — An engineer monitors multiple screens in a control room, reflecting how satellite data strengthens nuclear facility perimeter security worldwide.

Satellite Monitoring of Nuclear Facility Perimeters

1
Observation Satellite
SAR and optical sensors capture site imagery
2
Secure Downlink
Encrypted data relayed to ground station
3
Change Detection
AI flags new structures, vehicle movement, heat signatures
4
Analyst Alert
IAEA or national authority receives verified report

Satellites continuously image nuclear sites, enabling independent analysts to detect unauthorized activity or undeclared facility changes in near real-time.

Page in the build queue

This application has its place in the atlas. The full page — short and long descriptions, what-matters bullets, sovereignty rationale, and the eight-field architecture block — is being written next.

Maturity reading: Operational systems exist with paying customers. Phase 1 built §4.1 (Maritime Intelligence) end-to-end as the depth-and-format reference. Section 4 is the next section to graduate from scaffold to full content; the rest follow on the roadmap.

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Refinery & Petrochemical Watch

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