Afterthought about atmospheric jumps:
Canon -- some at least -- describes jump as the process of generating a tiny pocket universe and pinching it off from the normal universe. The pocket universe remains stable for about a week, and then spontaneously collapses back into the normal universe. The latter part of the process is catalyzed by gravity out to about 100 planetary (or stellar) diameters, but doesn't require the gravity catalyst.
What is not defined is how long the neck between the normal universe and the pocket universe remains open before it pinches off. If it's instantaneous, the "pop" would be the collapse of a bit more* than 14 cubic meters of atmosphere per dton of ship. But if it remains open for a while before pinching off, a larger volume of air might fall into the neck, if the pocket universe has room for more air around the outside of a ship. Additionally, if a lot of air can fall in through the neck before it pinches, the surrounding air will develop more inward velocity before the pinch.
So, consider a 100 dton Scout ship. In the instantaneous case, with a jump bubble that reaches one meter out from its roughly 1000 square meter surface area. That produces a void of 100 dtons, or 1400 cubic meters for the ship itself, plus 1000 cubic meters for the one meter deep bubble. That's 2400 cubic meters of boom. (A huge ship would have less surface area relative to volume due to square cube law.)
But suppose the jump bubble is much larger than the ship when fully expanded -- say a 100 meter sphere around a 50 meter long ship like the Scout. That's 500k cubic meters of pocket universe with just 1400 cubic meters of ship -- a lot of space into which atmosphere can fall, at a peak velocity of about Mach 1.3, which is a much bigger boom if the bubble remains open for a while.
I could geek out a spreadsheet for all of this if anyone really wants to know, but I don't know enough fluid dynamics to say whether the numbers would be accurate even if I did it.
