Analysis of the first interferometric fringes recorded
at Dome C, Antarctica are presented. Measurements were taken 31 January and 1 February
2005 during daytime. Our purpose in performing
the analysis was to measure temporal fluctuations of the atmospheric
piston, which are critical for interferometers, and determine their sensitivity.
These scales are derived through the motion of the image that is formed in
the focal plane of a Fizeau interferometer.
We could establish a lower limit to the coherence time by studying the decay
rate of correlation between successive fringes. Coherence times are measured to
be larger than
© 2006 Optical Society of America
Atmospheric and Oceanic Optics
Original Manuscript: October 10, 2005
Revised Manuscript: April 20, 2006
Manuscript Accepted: May 12, 2006
Aglae Kellerer, Marc Sarazin, Vincent Coudé du Foresto, Karim Agabi, Eric Aristidi, and Tatyana Sadibekova, "Method of estimating time scales of the atmospheric piston and its application at Dome C (Antarctica)," Appl. Opt. 45, 5709-5715 (2006)