Watt meter for bike

Application is calculating the current power that the cyclist is generating. The weight of cyclist is took from user profile and to his weight is added 9 kg for weight of bike. All other needed informations are got out from sensor (gps speed, altitude...) So there is no need for additional sensors like speed sensor or cadence sensor. The final power is calculated out from power to overcome rolling resistance , wind (drag), gravity and acceleration. Looking forward for feedback. **************************** In version 1.3 more accurate power estimation, because of smoothing the input data. Also output power is smoothed in 5 s interval. In hill climbing very good estimation. Little less good at straight roads because in calculation it can't be included direction and strenght of wind and aslo it is impposible to detect riding in grup (there can be up to 25% less power needed because of drag)