[PATCH 2/2] Correctly calculate SAC rate in the presense of surface events

[Lutz Vieweg]

On 02/24/2013 08:54 PM, Linus Torvalds wrote:
> Now, one thing I would personally like to see is the ability to see
> SAC rates not for the whole dive, but for a certain *part* of the
> dive.

Hmm. But that part would have to be at least several minutes long
to allow for any reasonably accurate computation.

AFAIK, the gas pressure sensors are usually providing measurements
with with no more than "1 bar" precision, so when my breathing
decreases the gas pressure by about 2 bars per minute, an SAC
computed for a 5 minute interval would at least have a systematic
error of ~ 10 %.

BTW: Suunto's SDM tries to plot an SAC graph into the profile, and
its values always seemed kind of erratic to me.

Regards,

Lutz Vieweg