A federal judge has cleared a planned pilot program by the Baltimore Police Department to consistently surveil the city for six months using cameras attached to airplanes.

U.S. District Judge Richard Bennett in Baltimore on Friday ruled against a grassroots think tank and area activists who asked him to keep the program from taking off, arguing that it violates their First and Fourth Amendment rights.

Under the six-month planned test, up to three planes will collect images of the city at a rate of one per second to help police investigate murders, nonfatal shootings, armed robberies and carjackings.