Calibration and operation of the active surface of the Large Millimeter Telescope

F. P. Schloerb; D. Sanchez; G. Narayanan; N. Erickson; K. Souccar; G. Wilson; D. Gale; David H. Hughes; D. Smith

doi:10.1117/12.2232821

8 August 2016 Calibration and operation of the active surface of the Large Millimeter Telescope

F. P. Schloerb, D. Sanchez, G. Narayanan, N. Erickson, K. Souccar, G. Wilson, D. Gale, David H. Hughes, D. Smith

Proceedings Volume 9906, Ground-based and Airborne Telescopes VI; 99066C (2016) https://doi.org/10.1117/12.2232821
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The Large Millimeter Telescope relies on an active primary surface to achieve its specified surface accuracy. The active primary has two functions: (1) it provides a means to correct the surface for gravitational deformations with changing elevation; and (2) it provides a capability to improve the shape of the surface in real time due to transient effects of thermal gradients within the structure. At LMT, our development work has addressed both problems and in this paper we describe the derivation of the gravity deformation model and the schemes developed to measure and improve the antenna surface during regular scientific observations.

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F. P. Schloerb, D. Sanchez, G. Narayanan, N. Erickson, K. Souccar, G. Wilson, D. Gale, David H. Hughes, and D. Smith "Calibration and operation of the active surface of the Large Millimeter Telescope", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99066C (8 August 2016); https://doi.org/10.1117/12.2232821

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