FIGURE 2 
SOURCES OF GEOMETRIC ERROR 
FLIGHT SEGMENT 
ALIGNMENTS 
• ATTITUDE CONTROL 
SYSTEM TO TM 
• ATTITUDE CONTROL 
SYSTEM TO MSS 
ATTITUDE CONTROL 
• POINTING 
• RATE 
ATTITUDE MEASUREMENT 
• ANGULAR DISPLACEMENT 
SENSOR CALIBRATION 
• INERTIAL REFERENCE 
UNIT CALIBRATION 
STRUCTURAL DISTURBANCES 
(JITTER) INDUCED BY 
■ THEMATIC MAPPER 
• MULTISPECTRAL SCANNER 
• ANTENNA DRIVE 
• SOLAR ARRAY DRIVE 
MULTISPECTRAL SCANNER 
■ SCAN MIRROR NONLINEARITY 
• SCAN REPEATABILITY 
• TIMING AND CHANNEL DELAYS 
• BAND TO BAND 
-THEMATIC MAPPER 
• SCAN MIRROR NONLINEARITY 
• SCAN LINE CORRECTOR 
NONLINEARITY 
• SCAN REPEATABILITY 
• SCAN GAP 
• TIMING AND CHANNEL DELAYS 
• BAND-TO-BAND 
OTHER 
• EPHEMERIS 
• TIME