In astronomy, the magnitude of a gravitational redshift is often expressed as the velocity that would create an equivalent shift through the relativistic Doppler effect. In such units, the 2 ppm sunlight redshift corresponds to a 633 m/s receding velocity, roughly of the same magnitude as convective motions in the Sun, thus complicating the measurement. The GPS satellite gravitational blueshift velocity equivalent is less than 0.2 m/s, which is negligible compared to the actual Doppler shift resulting from its orbital velocity. In astronomical objects with strong gravitational fields the redshift can be much greater; for example, light from the surface of a white dwarf is gravitationally redshifted on average by around (50 km/s)/c (around 170 ppm).
in astronomy the magnitude of a gravitational redshift is often expressed as the velocity that would create an equivalent shift through the relativistic doppler effect in such units the 2 ppm sunlight redshift corresponds to a 633 m/s receding velocity roughly of the same magnitude as convective motions in the sun thus complicating the measurement the gps satellite gravitational blueshift velocity equivalent is less than 02 m/s which is negligible compared to the actual doppler shift resulting from its orbital velocity in astronomical objects with strong gravitational fields the redshift can be much greater; for example light from the surface of a white dwarf is gravitationally redshifted on average by around (50 km/s)/c (around 170 ppm)