F d is the doppler due to the earth's orbit of the sun. F o is the frequency of interest. LOS is the Ecliptic Longitude of the Sun. LOE is the given Ecliptic Longitude. LAE is the given Ecliptic Latitude.
F o is the frequency transmitted by the source.
F d is the doppler shifted frequency. F o is the frequency transmitted by the source. A is the angle the observer is moving at relative to the source. A is 0 moving toward the source and 180 moving away.