6.9.2 — Infrastructure Resilience — maturity: live

Power Outage Detection

Using nighttime light emissions detected from orbit to identify, locate and track large-scale power outages across national territory within hours of onset.

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When the grid fails — through storm damage, cyberattack, equipment cascade or conflict — national emergency managers are often flying blind. Ground-reporting networks go silent precisely when they are needed most, and utility SCADA telemetry is either compromised or inaccessible outside the operator's own walls. Satellite-based nighttime light detection fills that gap: a low-Earth orbit radiometer passes over a blacked-out city and registers the absence of light against a calibrated baseline, flagging the outage boundary within one to two hours of the event.

The satellite stack combines a high-sensitivity panchromatic low-light imager — capable of resolving light levels down to 10⁻⁹ W cm⁻² sr⁻¹ µm⁻¹ — with repeat-pass tasking across a multi-satellite constellation. Change detection against a pre-built nocturnal baseline atlas isolates outage polygons at roughly 500-metre spatial resolution. Ancillary RF survey payloads can corroborate by detecting the collapse of LTE and FM broadcast signals in the same area, adding a second independent indicator.

The operational payoff is concrete: emergency coordinators receive a georeferenced outage map before any utility company has finished its manual fault assessment. That map drives generator pre-positioning, hospital triage prioritisation and restoration crew routing. For a government managing a major disaster, knowing which districts lost power — and in what sequence — is the difference between a coordinated response and an improvised one. No commercial provider will guarantee delivery of this data during the exact crisis when a foreign government's export controls or commercial priorities may intervene.

What matters

Nighttime light radiance drops of more than 30% relative to the rolling 14-night baseline reliably flag distribution-level outages affecting more than 5,000 households.
NOAA's VIIRS Day/Night Band, operating from 500m resolution, is the proven heritage instrument; a sovereign constellation replicates this at higher revisit without US export dependency.
Grid failure correlates directly with excess mortality — every hour of delay in restoration mapping translates to measurable harm in hospitals, cold chains and heating-dependent populations.
Outage boundary data is operationally sensitive: revealing which substations are dark and for how long exposes critical infrastructure vulnerability that must not transit foreign commercial clouds.

Sovereignty score: 8/10 — A nation's ability to see its own grid failing in real time must not depend on a foreign operator's tasking queue or commercial service agreement.

Critical infrastructure exposure: outage maps reveal which substations, hospitals and defence facilities lost power and when — data that must be classified and held domestically, not processed on a foreign commercial cloud.
Crisis availability: commercial nighttime light products (VIIRS, Black Marble) are US government assets subject to ITAR and operational prioritisation; access cannot be guaranteed at the moment of a major domestic disaster or conflict-induced grid attack.
Escalation and attribution control: if an adversary caused the outage, the detection data underpins a national response or legal case — it must be collected, held and disclosed entirely under sovereign authority.
Revisit on demand: commercial providers task their satellites against a global order book; a sovereign constellation can be reprogrammed within hours to increase revisit over a specific threatened region during a crisis without negotiation.

Reference architecture

Payload: High-sensitivity panchromatic low-light imager, 450–900 nm, NEL ≤ 2×10⁻⁹ W cm⁻² sr⁻¹ µm⁻¹, 500m GSD at nadir, 3,000 km swath; secondary RF survey payload 700 MHz–3 GHz for LTE/broadcast signal collapse corroboration
Bus class: 12U to 16U cubesat, 14–22 kg, 40–80 W payload power; thermoelectric cooling for low-light detector if passively cooled design is insufficient at orbital temperatures
Orbit: Sun-synchronous LEO at 520–560 km, ~22:30 local solar time descending node to maximise nighttime overpass coverage; 8-satellite constellation yields sub-3-hour revisit over national territory; expand to 16 satellites for sub-90-minute revisit during declared emergencies
Ground segment: 2-station national network (X-band downlink, S-band TT&C) co-located with existing national meteorological or defence ground infrastructure; SatNOGS UHF/VHF backup for housekeeping telemetry; encrypted key management on sovereign hardware
Software & data
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References

NOAA VIIRS Day/Night Band — Nighttime Light Applications — NOAA's VIIRS instrument on the Joint Polar Satellite System routinely captures nighttime radiance imagery used to detect power outages during hurricanes and other disasters. NOAA has published operational outage products for events including Hurricanes Maria and Ida.
NASA Worldview / Black Marble — Light at Night — NASA's Black Marble product suite provides calibrated global nighttime light composites that researchers and emergency managers use to assess electrification loss and outage extent after major disasters.
World Bank — Tracking Electrification and Outages from Space — The World Bank has documented the use of satellite nighttime light data to monitor energy access and disruption, noting its value in countries where ground-truth reporting infrastructure is unreliable or compromised during crises.
UNOSAT — Satellite-Derived Damage and Infrastructure Assessment — UNOSAT routinely deploys satellite-derived nighttime light change detection to assess power infrastructure damage in conflict and disaster zones, demonstrating the operational maturity of the methodology at national scale.
IEEE — Remote Sensing of Power Outages Using VIIRS DNB — Peer-reviewed analysis confirming that VIIRS Day/Night Band imagery can detect and delineate power outage boundaries with high accuracy when compared against utility-reported outage records, validating the satellite approach for emergency management use.