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Mem. S.A.It. Suppl. Vol. 2, 70 c SAIt 2003

Summary: Mem. S.A.It. Suppl. Vol. 2, 70
c SAIt 2003
Memorie della
COBBER: A Pocket Cloud Detector for Dome C
J.T. Dempsey, J.W.V. Storey, and M.C.B. Ashley
School of Physics, University of New South Wales, NSW 2052, Australia
e-mail: jtd@phys.unsw.edu.au
Abstract. COBBER (ClOud OBservER), is a mid-infrared sky monitor featuring
a 10Ám Perkin-Elmer TPS534 thermopile detector. Radiation is focussed on to
the detector through an anti-reflection coated, hemispherical ZnSe lens, providing
a 30
field of view on the sky. At 10cm in length and 4cm diameter, the tiny cloud
monitor was designed for ease of transportation and an extremely low power bud-
get. Run in conjunction with ICECAM, it uses power supplied by lithium thionyl
chloride (LiSOCl2) batteries. COBBER is powered up by the ICECAM system
once every two hours, sending its data to Sydney via the ARGOS satellite link.
The instrument was installed at Dome C in January of 2003, and has been col-
lecting data continuously from this date. In over 70 observing days, only four days
of cloud have been recorded, results which have been confirmed by a webcamera


Source: Ashley, Michael C. B. - School of Physics, University of New South Wales


Collections: Physics