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Upshot Knothole Grable - first and only nuclear test of the Atomic Cannon.

ICBM

The mushroom cloud resulting from shot Grable, an atomic shell shot from a cannon in 1953.

Crossroads Baker 1946 Bikini Lagoon. Same type of weapon which exploded over Nagasaki in 1945. This was 90 ft underwater in Bikini Lagoon.

I only have some land based camera info to Tewa. The closest was 11 miles from GZ. In general, around 14 to 18 miles from GZ. My guess would be observation and aircraft around 20 miles or greater from GZ. The cameras following cloud rise were over 160 miles away.