During March 7th 1970 solar eclipse on Nantucket island I flew our electrometer package using US Weather Bureau telemetry equipment (a WBRT) (I guess everyone at the UofMN was obligated to give mid-term exams that week so I got to do it).
Clear day on Nantucket, eclipse beginning… WBRT telemetry receiver I was using on the tower in the background, amateur astronomers in the foreground. And yes, the birds sang at totality!
17 year old me, with my Duluth wolf skin trimmed air force surplus parka!
Calibrating a modified radiosonde w/electrometer prior to launch.
The Medicine Hat test was pretty strange, a 500 ton TNT sphere about 10 ft. off the ground. They blew up everything from helicopters to houses, and even brought in a bunch of 50ft spruce trees (blew all the needles off!). Rained 1mm spheres of fused top soil for some time after. Our experiment was an attempt to see how the rising cloud distorted/compressed the atmospheric potential (normally 100v/meter). We had to drive 30mi on a winding gravel road over the tundra to the test site every day.
I took this picture just a second or two after detonation.