Satellite firm Inmarsat is using the Doppler effect for the first time to determine where Malaysia Airlines Flight 370 went. ... How Investigators Used the Doppler Effect to Trace Flight 370. By .

The orbital angle of the spacecraft, which has been locked in orbit around Mars since October, was raised to almost 74 degrees from 7 degrees with respect to the planet's equator.

The integration of microwave photonics into sensor and radar systems has emerged as a transformative approach to achieve high-precision measurements of Doppler frequency shift (DFS) and angle-of ...