Basically: Does anyone—not to mention, the military—need such detailed information of people going about their daily lives? The prospect of racial and religious profiling also is an issue.
A senior policy analyst at the ACLU, Jay Stanley, chatted with The Guardian about this concern. He told the paper his organization does "not think that American cities should be subject to wide area surveillance in which every vehicle could be tracked wherever they go." And beyond that, “we should not go down the road of allowing this to be used in the United States, and it's disturbing to hear that these tests are being carried out, by the military no less."
Other questions: How will they use the data, exactly? Where will it be stored? How long will they hold onto it? That information has yet to be released.
The FCC filing was made on behalf of the Sierra Nevada Corporation, an aerospace and defense company. The U.S. Southern Command (Southcom) commissioned the tests. Southcom handles a handful of operations in South America and the Caribbean, including disaster response, security, and intelligence. Perhaps unsurprisingly, the U.S. military works with Southcom in trying to cut off drugs headed to the States.