To further our knowledge of very-low-frequency signals received via the ... but the equipment used did not allow the variations of doppler shift with time to be resolved to better than 30 min.

The same shifts in frequency and wavelength are ... relative change in wavelength due to the Doppler shift for a receding galaxy. The Doppler equation used for sound calculations cannot be used ...

Going another step and measuring Doppler Shift – the difference in the returned signal’s frequency – will ... it another layer of complexity. Using equations dating from 3rd century China ...