Computer Science
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.2019..211j&link_type=abstract
Proc. SPIE Vol. 2019, p. 211-221, Infrared Spaceborne Remote Sensing, Marija S. Scholl; Ed.
Computer Science
Scientific paper
The Differential Microwave Radiometer (DMR) experiment on the Cosmic Background Explorer is in the final year of a scheduled four years of operation to measure large- and intermediate-scale anisotropies in the Cosmic Microwave Background (CMB). The DMR instrument comprises two independent radiometers at each of three frequencies, 31.5, 53, and 90 GHz, where the frequencies were chosen to best separate the CMB from the foreground emissions from galactic dust and electrons. The radiometers switch symmetrically between two beams of 7 degree(s) half-power width separated by 60 degree(s) on the sky, and provide a data set of sky brightness temperature differences that allows the determination of all-sky maps of brightness temperature variations at 7 degree(s) resolution. Data from the first year's operation were used to produce maps of unprecedented sensitivity in which the long-sought intrinsic anisotropies were identified. Three more years of data will ultimately be available to refine the anisotropy measurements.
Bennett Charles L.
Gulkis Samuel
Janssen Michael A.
Kogut Alan J.
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