An Instrument to Measure the Temperature of the Cosmic Microwave Background Radiation at Centimeter Wavelengths
The Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission (ARCADE) is a balloon-borne instrument to measure the temperature of the cosmic microwave background at centimeter wavelengths. ARCADE uses narrowband cryogenic radiometers to compare the sky to an external full-aperture calibrator. To minimize potential sources of systematic error, ARCADE uses a novel open-aperture design that maintains the antennas and calibrator at temperatures near 3 K at the mouth of an open bucket Dewar, without windows or other warm objects between the antennas and the sky. We discuss the design and performance of the ARCADE instrument from its 2001 and 2003 flights.
The Astrophysical Journal Supplement Series
- Pub Date:
- October 2004
- Cosmology: Cosmic Microwave Background;
- Cosmology: Observations;
- 6 pages including 5 figures. Submitted to The Astrophysical Journal