Test repository based on:

• https://github.com/kibotu/KalmanRx - time increment is not taken into account
• https://github.com/andreynovikov/GeoTrackFilter - deosn't seam to work, lng always 0
• https://github.com/pedro-stanaka/kalman-gps/ - works but path smoothing is insignificant

non of above take gps accuracy into account