How much do astronauts get paid?

As I understand it, they are Civil Servants on the government pay scale and get paid exactly as much as any other 'GS-level' worker at the same pay scale.

They probably fill out the same 'travel forms' that other government workers do, and are paid about $100.00 per day when on the ground and traveling between their home institution and some other venue.

They are not paid by the mile traveled, because 1) they are not using their own private cars and 2) they are traveling using government-supplied equipment.

I think their pay scale places them somewhere in the $70,000 to $120,000 per year bracket.