It was all abit unexpected at the time and the US was interested to know how it came to be that Australians were present.
I dare say somebody might write it up well after retirement for release after death.
Things got ... interesting.
Contracted to a cutout company.
It just happened to be the first such survey in India and to coincidentally be at the exact place and time the area turned into an underground nuclear test site.
How badly were they hurt? Were they hurt at all?
Their diginity took a mild beating after landing and spending a month under quasi "friendly" house arrest by Indian troops who watched them gather more data and process it, compounded by questioning from US border agents in following years in transit, and offset by the joy of watch high caste Indian Geophysicists that insisted on being in the planes vomit on every end of line turn.
( It's a gut wrenching maneuver )
Telling them the planes weren't landing and they'd have to clean up their own mess "sparked joy", I believe.