Missing pO2 samples from CCR download [was: 4.7.8: a couple of questions]

[Martin Long]

Davide,

I can confirm I also had this problem, and now I've got 6 months of dives
with missing data. The fallback solution looks ideal to me. I hope we're
able to get a build with these changes soon.

Martin

On Fri, 25 May 2018, 18:33 Anton Lundin, <glance at acc.umu.se> wrote:

> On 25 May, 2018 - Jef Driesen wrote:
>
> > On 25-05-18 16:35, Willem Ferguson wrote:
> > >On 25/05/2018 15:55, Jef Driesen wrote:
> > >>The main disadvantage is that you'll no longer know which type of ppO2
> > >>(sensor or voted/average) you are getting. Especially if you only have
> > >>one sensor.
> > >
> > >I would agree, but at least one gets the calculated pO2 as perceived by
> > >the machine at the time, even though there is no idea about sensor
> > >problems during the dive. It is so much better than having no pO2 data
> > >to evaluate after a dive. This pO2  would still correspond to the data
> > >in the pO2 graph of the Shearwater Desktop software.
> > >
> > >I do not quite get the argument about one sensor? For one sensor there
> > >is no averaging or voting?? I'm not seeing something, so please spell it
> > >out?
> >
> > The average ppO2 is always a single value. But there is often more
> > than one sensor. So you could assume that if you get more than one
> > ppO2 value that they are values from a sensor. But in the case of a
> > single sensor, that doesn't work, and you won't be able to tell
> > which value you got.
> >
> > I'm not sure if the average ppO2 is always equal to the sensor ppO2
> > for the single sensor case. Maybe the dive computer does averaging
> > over several measurements to ignore outliers? (Is simply don't
> > know.)
>
> Any way, its better that we get A value, than no value.
>
> It would be dead simple to emit a SAMPLE_EVENT_STRING, or a
> DC_FIELD_STRING just saying, "hey, these are not the raw ppO2 values you
> where looking for, but the next best thing", if you would have taken
> those patches.
>
>
> //Anton
>
>
> --
> Anton Lundin    +46702-161604
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