radian2deg        286 core/gps.c         direction = radian2deg  (pspeed.alpha);                                 // get direction
radian2deg        290 core/gps.c         peil    = radian2deg    (pdelta.alpha);                                 // Bearing to destination
radian2deg        291 core/gps.c         angle  = radian2deg     (pdelta.alpha-pspeed.alpha);                    // Angle relative to the direction of march