President Trump tweeted an apparently classified image of an Iranian launch pad on August 30. He has the right to do so. But he probably did not expect everything that the tweet would reveal.
Now astronomers have easily identified the exact satellite that took the image. By measuring the semi-major and semi-minor axes of the ellipse (as viewed in the image) of the circular launch platform, they were able to determine the angle of view. This matched precisely with a satellite known as USA 224, previously of unknown capability. Google Earth shows the launch pad as about 60 meters in diameter, which therefore suggests a satellite resolution capability of 10 centimeters per pixel. That resolution is very impressive and also previously unknown.
The detail in the image is surprising, even to satellite imagery experts. In an interview with NPR, Melissa Hanham of the Open Nuclear Network in Vienna said, “… I did not believe <the image> could come from a satellite.” Hanham also said that “I imagine adversaries are going to take a look at this image and reverse-engineer it to figure out how the sensor itself works and what kind of post-production techniques they’re using.”Thanks to Trump, We’ve Got a Better Idea of the Capabilities of US Surveillance Satellites