Analyze Route and Analyze Tilt Advanced View

[texmurphy]

Often when I do the Analyze Tilt and Power Advanced View, the Before Repair shows a lot of drift from zero. Especially after significant climbs and descents. Today's ride is exceptional for odd repair, both before and after. For several minutes on this ride we were near sea level, which recorded as negative on the Newton+ due to barometric weather changes. Otherwise elevation was better than my Edge 500 (both set for known elevation at start).



ibr attached.

[Velocomp]

Sometimes I worry we make things worse with all of the information we provide.

Please note that, after applying the changes, the results change by only 3 watts! This is an insignificant correction, about 2%...

We don't show the tilt plot as a matter of practice, because the Newton firmware does such a good job of fixing things in real time. If you want to look anyhow, go ahead

[texmurphy]

Usually the correction in elevation matches "reality" in the Tilt Advanced View.
For today's ride, the entire elevation in the Tilt Advanced View is shifted negative in the image above.

A more normal Tilt Advanced View shows corrected tilt with normal elevation like below:

[Velocomp]

Same comment. There is negligible shift in the before/after stuff; about a 2% change.

Don't worry about dancing on the head of a pin...

[texmurphy]

The question is if there is a bug in the chart display resulting in the totally negative elevation traces in the charts.
Question was not about the power calculation or dance locations.

[KenS]

The question is if there is a bug in the chart display resulting in the totally negative elevation traces in the charts.
Question was not about the power calculation or dance locations.

Isn't that just an error on the starting elevation?
The Newton only measures the relative changes in elevation, not the absolute elevation.

[texmurphy]

Isn't that just an error on the starting elevation?

No, initial elevation set at ride start to reference elevation. The other elevation charts show elevation correctly, only Tilt Advanced View is wrong.
Try download of the ibr and see for yourself.