Dear Dr Jorge and co-authors,

I am happy to accept your paper for publication in AMT after some remaining technical corrections.
These are:
1) Please make sure that the name "FLUENT" is always written in capital letters. I spotted a few paras in the paper (for example, page 11, around line 30) where this is not the case, and this might be confusing.
2) Fig. 2 and similar figures: I tend to agree with reviewer # 1 that "pink" and "light purple" lines are hard to distinguish, and I would urge you to select a different color (at least a different shade) for any of the two.
3) The remark of Referee # 2 about the pioneering work by Brewer et al. and your reaction: I think that the reviewer meant that this pioneering work for measurements of water vapour in very dry air (as the Brewer et al. paper title suggests), regardless from which platform, should be cited. I understand very well that the technical details of your work are heavily related to the balloon platform and would not occur in a similar way on an aircraft platform. However, without the method as such, all your work could not be done. Changing the title of your paper is fine with me since the new title describes the work more specifically; however, I still think it would be appropriate to refer to Brewer et al. for the method as such.

Congratulation to a very fine paper!
Kind regards,
Gabriele Stiller