On Sat, 17 Sep 2016 23:50:04 -0700, Bret Hess wrote:

Thanks, I enjoyed that.

What do the Perlan flights have to offer that balloons don't already
measure?

At a guess, the ability take measurements along nominated tracks through
an air mass. This is unlike a balloon, which is limited to sampling one
vertical column[1] though that air mass.

[1] distorted by the vertical wind profile, of course, but still limited
by its ability to control only its vertical ascent/descent rate.



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martin@ | Martin Gregorie
gregorie. | Essex, UK
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