11. It operated by using the Doppler shift of the returned signal. 12. There you go, that is the gravitational Doppler shift AKA gravitational time dilation. 13. Doppler Shift , since the relative velocity is 250 m . p . h ."14. With characteristic imagination and insight, he devised Doppler shift and Zeeman effect solar cameras. 15. :: : : It's also at least possible the Doppler shifts are themselves artificial. 16. Doppler shift may also contribute to frequency differences in mobile radio frequency communications systems.17. Standard BGAN terminals cannot be used on moving aircraft due to doppler shift effects. 18. :: : Look at relativistic Doppler shift for the formula. 19. :That sounds like the Doppler shift ( which exists even in Newtonian physics ). 20. This introduces a Doppler shift in the dispersion relations.