11. Unlike a pitometer, the speed measurements from a doppler instrument are of ground speed . 12. While foraging, bumblebees can reach ground speeds of up to. 13. What is the actual " ground speed " of the moon relative to the earth? 14. The time aircraft will be inside the cone depends to it's height and ground speed . 15. But as Pius says below, the satnav is showing the ground speed , not the airspeed. 16. The decision to continue climbing was based on ground speed readouts from his GPS unit. 17. Green Satin provided accurate and immediate measurements of the true ground speed and the drift angle. 18. If there is no wind it is also the same as ground speed ( GS ). 19. The species has been measured at a ground speed of, measured by an aircraft tracking device. 20. With the benefit of hindsight, one might say Well, rely in the GPS ground speed !
