This discussion focuses on calculating the 3D Doppler shift between two satellites orbiting Earth at different velocities and altitudes. Key steps include determining the relative velocity of one satellite with respect to the other, calculating the Doppler factor based on this speed, and incorporating the gravitational redshift factor. Additionally, the discussion emphasizes the importance of the relative angle between the velocity vector and the displacement vector, as it influences the Doppler factor, particularly in the context of the transversal Doppler effect.
PREREQUISITESAerospace engineers, astrophysicists, and anyone involved in satellite communication and signal processing will benefit from this discussion.
It is not sufficient to know the relative speed. The Doppler factor also depends on the relative angle between the velocity vector and displacement vector. For example, the transversal Doppler effect is just a gamma factor.Ibix said:Work out the velocity of one satellite with respect to the other, calculate the Doppler factor from the speed, and multiply by the gravitational redshift factor.