A 3-field differential photometer for far infrared anisotropy measurements |
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| Affiliation: | 1. Nuclear and Particle Physics Department, Faculty of Physics, National and Kapodistrian, University of Athens, Athens, Greece;2. Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation of Russian Academy of Science, IZMIRAN, Moscow, Russia |
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| Abstract: | We describe a differential photometer developed for ground based observations of the Cosmic Background Radiation anisotropy and of diffuse galactic dust emission at millimetric wavelengths. Preliminary tests, which demonstrate the advantages of the 3 fields modulation with respect to the more conventional single subtraction, are reported. Both atmospheric fluctuations and instrumental offset are significantly reduced. |
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