DARPA may have already gone to the trouble of building a 1.8 gigapixel camera as part of its ARGUS-IS project (pictured above), but it looks like the US Army is setting its sights a little higher, and it's now soliciting proposals for a 2.3 gigapixel camera that would be used for some super-wide aerial surveillance. While obviously still quite a ways from becoming reality, the Army hopes the system will be both smaller and lighter than previous systems, work in the infrared range to boot, and capture images at a rate of two frames per second. The key bit, however, is of course that 2.3 gigapixel sensor, which should let the camera provide continuous coverage of a range of about sixty-two square miles at a resolution of 0.3 meters, or just enough to make out the outline of your tinfoil hat.