Low Budget Air Space Photography
An anonymous reader writes "With a budget of just 350 pounds, two British PhDs in engineering sent a balloon with cameras attached to a height of over 30 km." The photos and video are pretty amazing. Especially the very hi-tech styrofoam box.
Yes, you're supposed to coordinate the launch with local airspace authority (at least that's the way at my place...). Also, the payload should conform to certain requirements... (if it gets hit despite all the precautions, apparently)
But generally, a very straightforward formality / folks dealing with it tended to be nice.
One that hath name thou can not otter
In the US, the FAA has rules for untethered balloons. If you're below certain size and material restrictions, you're good to go. Issuing a NOTAM (Notice To Airmen) is highly recommended, even if you're not required to file one. Demonstrates that you're being professional about your activities.