Shortly after Operation Epic Fury began, something unusual happened to the world’s satellite imagery. The U.S. government asked every commercial satellite provider to voluntarily impose an indefinite blackout over Iran and the Gulf. Planet, one of the largest providers, introduced a two-week delay on all imagery in the designated area. For journalists, researchers, and the public, the war zone went dark. Bellingcat’s response was to build a tool that sees through the blackout — not with optical cameras, but with radar. The Iran Conflict Damage Proxy Map, released on April 7, uses synthetic aperture radar (SAR) data from the European Space Agency’s Sentinel-1 satellite to detect destruction patterns across Iran and the wider Gulf region. It is free, open-source, and available to anyone with a web browser.

How Radar Sees What Cameras Can’t

Optical satellites take pictures using reflected sunlight — essentially very expensive cameras in orbit. They produce clear, detailed images but are useless at night, in cloud cover, and when governments ask operators to stop sharing them. SAR works differently. The satellite sends pulses of microwave energy toward the ground and measures what bounces back. The texture of the return signal tells the algorithm what the surface looks like: intact buildings produce one pattern, rubble produces another. SAR works through clouds, at night, and — crucially — no government can ask the European Space Agency to stop collecting Copernicus data. It is a public good, freely available. Bellingcat’s algorithm takes a full year of pre-war SAR imagery to establish a baseline — what “normal” looks like for every pixel in the image. It then compares post-war imagery against that baseline using a statistical test that identifies pixels where the surface texture has changed beyond what 99% of normal variation would produce. Those pixels light up on the map. Clusters of changed pixels near known military sites are strong indicators of strike damage.

The Digital Fog of War

The U.S. imagery blackout was unprecedented in its scope. While governments have previously restricted satellite access during military operations — Israel reportedly obtained restrictions during its operations in Gaza — the Iran blackout applied to an entire country and an indefinite timeframe. The policy covered all commercial providers, effectively removing Iran from the high-resolution optical record for the duration of the conflict. The stated rationale was operational security. The practical effect was to limit the ability of journalists, human rights organisations, and independent analysts to verify claims made by any party to the conflict. In a war where both sides have incentives to exaggerate or conceal the truth, the absence of independent imagery is not a neutral condition. It is a strategic advantage for whoever controls the narrative. Bellingcat’s tool does not produce the same resolution as commercial optical imagery. It cannot identify individual buildings or count vehicles. But it can detect large-scale patterns of destruction — levelled industrial complexes, damaged airfields, obliterated infrastructure. Cross-referenced with open-source map data, these patterns can be matched to known military and industrial sites.

Why This Matters Beyond Iran

The Iran Conflict Damage Proxy Map is not just a tool for one war. It is a proof of concept. If governments can black out optical imagery but cannot black out radar, then SAR-based damage assessment becomes the fallback layer that keeps independent observation alive during any future conflict. The Sentinel-1 data is free. The algorithm is open-source. The expertise required to build and run such a tool is significant but not insurmountable. Bellingcat has demonstrated that a non-governmental organisation, working with publicly available data and open methods, can pierce a government-imposed information blackout within weeks. That is a capability that will outlast this war. And it is a reminder that in the age of satellite surveillance, true darkness is harder to impose than it used to be. Sources: Bellingcat, NPR, beSpacific