The VST telescope at Paranal observatory.
Control system diagram.
Application of a torque bias.
The telescope seen from the instrument side.
Bode diagram of altitude axis speed controller zero-pole filter.
Variable integral gain. The coordinates of the points are: (0, 2 × 10−3), (2, 2 × 10−3), (4, 1.5 × 10−3), (52, 2 × 10−5), (72,0).
Wind speed during tests.
Altitude tracking map results.
Azimuth tracking map results.
Rotator tracking map results.
Tracking map results (az, alt, rot). The x-axis shows the numbering of the tests.
Altitude tracking error vs time.
Azimuth tracking error vs time.
Rotator tracking error vs time.
Effect of combined error. The x-axis shows the numbering of the tests.
Results of a pointing modeling session.
Effect of the autoguider corrections.
Pointing model main terms.
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