Chapter 5: FGS Calibration Program 5.1 Position Mode Calibrations and Error Sources 5.1.1 Position Mode Exposure Level Calibrations 5.1.2 Position Mode Visit Level Calibrations 5.1.3 Position Mode Epoch-Level Calibrations 5.2 Transfer Mode Calibrations and Error Sources 5.3 Linking Transfer and Position Mode Observations 5.4 Cycle 14 Calibration and Monitoring Program 5.4.1 Active FGS1r Calibration and Monitoring Programs 5.5 Special Calibrations