I Found The US Nuclear Detection System In Space

While doing some amateur radio astronomy I stumbled across the United States' nuclear detection system! This is a series of sensors on GPS satellites, which transmit data back to earth around 1381.05MHz. I didn't know what this was at first, but I looked into it and learned some interesting things!

Research paper about L3 GPS interference with radio astronomy: https://dione.carthage.edu/ojs/index.php/wsc/article/view/78

Why do scientists study 1420MHz: https://en.wikipedia.org/wiki/Hydrogen_line

Discovery Dish: https://www.crowdsupply.com/krakenrf/discovery-dish

Discovery Drive: https://www.crowdsupply.com/krakenrf/discovery-drive

My scanning software: https://github.com/saveitforparts/Discovery-Drive-Scan

Related video: https://www.youtube.com/watch?v=P7Dek2pXUHs

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