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Proceedings Paper

The GPS water vapor monitor and thermal astronomy at Gemini South
Author(s): James Radomski; Gelys Trancho; Lucas Fuhrman; Mark Falvey; Pedro Gigoux; Vanessa Montes; Felipe Daruich; Manuel Lazo
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Paper Abstract

We will discuss the implementation and calibration of a new GPS based water vapor monitor installed at Cerro Pachón for the Gemini Observatory in Chile. The primary goal of this system is the use of GPS signals to monitor the Precipitable Water Vapor (PWV) in the atmosphere in near-realtime. This is vital in maximizing the efficiency of queue observations in the thermal infrared in which atmospheric transmission and sensitivity is highly dependent on PWV. The GPS WV system was calibrated using near-IR spectroscopy of known water lines based on atmosphere models and imaging the thermal mid-IR background. Observations were conducted using the near-IR imager/spectrometer Phoenix for K, L, and M-band spectroscopy (2.2μm, 3.5μm, 4.5μm) and the mid-infrared imager/spectrometer T-ReCS imaging between 8-20 μm.

Paper Details

Date Published: 29 July 2010
PDF: 14 pages
Proc. SPIE 7737, Observatory Operations: Strategies, Processes, and Systems III, 77371S (29 July 2010); doi: 10.1117/12.857073
Show Author Affiliations
James Radomski, Gemini Observatory (Chile)
Gelys Trancho, Gemini Observatory (Chile)
Lucas Fuhrman, Gemini Observatory (Chile)
Mark Falvey, Univ. de Chile (Chile)
Pedro Gigoux, Gemini Observatory (Chile)
Vanessa Montes, Gemini Observatory (Chile)
Felipe Daruich, Gemini Observatory (Chile)
Manuel Lazo, Gemini Observatory (Chile)

Published in SPIE Proceedings Vol. 7737:
Observatory Operations: Strategies, Processes, and Systems III
David R. Silva; Alison B. Peck; B. Thomas Soifer, Editor(s)

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