Statistical properties of atmospheric emission in the infrared. I - Instrumentation and observations

Details Statistical properties of atmospheric emission in the infrared. I - Instrumentation and observations Statistical properties of atmospheric emission in the infrared. I - Instrumentation and observations

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....65..193b&link_type=abstract

Astronomy and Astrophysics, vol. 65, no. 2, Apr. 1978, p. 193-197. In French.

Astronomy and Astrophysics

Astrophysics

1

Atmospheric Radiation, Electromagnetic Noise Measurement, Infrared Spectrophotometers, Statistical Distributions, Beam Splitters, Focal Plane Devices, Infrared Radiation, Liquid Helium, Noise Spectra, Spatial Filtering

Scientific paper

We describe an infrared photometer used to study statistical properties of sky noise at the focus of a telescope. It consists of a beam splitting system which gives two channels of simultaneous observations. We determine their correlation as a function of separation in the focal plane. We search for possible spatial filtering by varying the size of the cold image of the pupil, using an internal mechanism of a liquid helium dewar. We present the method of our observations and give specific values of characteristic parameters.

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