…the Department of Homeland Security’s Domestic Nuclear Detection Office. We noticed them in 2012 when they last buzzed the ‘hood. The helicopter is conducting aerial tests to assess natural background radiation levels.
If they are performing the same sweep as they did in 2012, the chopper, which belongs to the National Nuclear Security Administration, will cover about 69 square miles over San Francisco, Pacifica and Oakland.
The helicopter flies in a grid pattern about 300 feet above ground during daylight hours.
Federal officials say the data will be used as background to help local, state and federal entities measure radiation levels in the future.
Some more about the Domestic Nuclear Detection Office:
The Domestic Nuclear Detection Office (DNDO) is a jointly staffed office within the Department of Homeland Security. DNDO is the primary entity in the U.S. government for implementing domestic nuclear detection efforts for a managed and coordinated response to radiological and nuclear threats, as well as integration of federal nuclear forensics programs. Additionally, DNDO is charged with coordinating the development of the global nuclear detection and reporting architecture, with partners from federal, state, local, and international governments and the private sector.