The Pointing Error Budget

Apart from the track model, other sources of pointing error include :

• Mechanical hysteresis, e
• Antenna construction errors, e.
• Encoder resolution, e.
• Thermal Effects, e
• Telescope tracking, e
• SMU & TMU alignment
• Instrument alignment
• Signal-to-Noise ratio of pointing measurement, e.
• Pointing logging.
• Atmospheric seeing conditions, e.
• Summary