[Rio]

a National Nuclear Security Administration payload designed to detect the detonation of nuclear bombs from space.

I'm surprised that it takes a satellite to do that job.

[nascarnation]

I'm surprised that it takes a satellite to do that job.

Agree, why not just monitor Tweater?

[Tijeras_Slim]

A Vela Hotel satellite detected a possible nuke test in 1979. Possibly by South Africa.