Figure 10. Upper: The derived spectral shifts for exposure W0010102002 in the LiF1 channel of detector segment A. The sinusoidal variation is due to the motion of the satellite around the earth, while the offset from zero reflects the shift due to the motion of the earth in the direction of the target. In this case, the heliocentric shifts should be negative, since the earth is moving directly away from the target. Lower: The velocity of the satellite around the earth projected along the line of sight to the target.