Chapter 5:
Astrometric Error Sources

5.1 Levels of Position Mode Errors

5.2 Observation-Level Position Mode Errors

5.2.1 Rotation Angle Errors

5.2.2 Centroiding Errors

5.2.3 Locating Interferometric Null

5.2.4 Optical Field Angle Distortion

5.2.5 Lateral Color Error

5.2.6 Cross Filter Effect

5.2.7 Differential Velocity Aberration

5.2.8 Lever Arm Length and Offset Angle

5.3 Visit-Level Position Mode Errors

5.3.1 Position Mode De-jittering Errors

5.3.2 Drift Correction Errors

5.4 Field-Level Position Mode Errors

5.5 Transfer Mode Errors