Platform motions



    The platform will move because of temperature, tiedown tensions, weight distribution, and oscillations. We can measure the platform motion using theodolites (surveys), tilt sensors in the dome,  distomats, tiedown tension, and pointing error. The links below show some of these measurements. The links are also available through the optics, pointing, td hardware links.


Focus curves measured by tracking sources and moving the platform.
Pointing errors as we move the platform (vertically and rotations)
Pitch, roll, and focus using theodolite and tilt sensors to compute the tiedown correction.
Platform oscillations
Surveying the dome position from AO9
Tilt sensor measurements(from dome)

Individual measurements

<- page up