Understanding Isaac Info

[TuRu00]

Hello!

I would like to know about this values on Isaac:

Code: Select all

---------Selection Stats---------
Distance:    0,47 km (0:00:46)
Energy:       4,6 kJ
Cals Burn:    4,4 kcal
Climbing:       0 m
Braking:      0,0 kJ (0,0%)

          Min   Avg    Max
Power       0  100,4   231  W
DFPM Pow   25  136,6   255  W
Aero        0  106,0   245  W
Rolling    35   38,9    41  W
Gravity  -207 -112,0   -21  W
Speed    33,0   37,2  39,6  km/h
Wind     17,6   28,7  39,9  km/h
Elev      852    854   857  m
Slope    -2,7  -1,50  -0,3  %
Cadence    89   94,8   100  rpm

I understand that the average power is 100w, the DFPM measured 136w average, but I have some doubts about the Aero, Rolling and Gravity values:

[*] What are the other values? The watts measured for each sensor?
[*] Why the power is not the sum of Gravity, Rolling and Aero? What is missing?

Thanks!