mesospheric-thermospheric pressure

carlos-carlos

Hi.

With what error is the mesospheric-thermospheric pressure known?
Let's consider in particular the 110 km level. What is the atmospheric pressure at this level?
With what error is it note?

Besides, at groud level the pressure is 1012 mbar. But it may be 990 or 1030 even.
Which are the pressure fluctuations at 110 km level?

I welcome also any reference you could give me.

Thank you so much,
bye
Carlo