Observation of the fine structures (anisotropies, polarization, spectral distortions) of the Cosmic Microwave Background (CMB) is hampered by instabilities, 1/f noise and asymmetries of the radiometers used to carry on the measurements. Addition of modulation and synchronous detection allows to increase the overall stability and the noise rejection of the radiometers used for CMB studies. In this paper we discuss the advantages this technique has when we try to detect CMB polarization. The behaviour of a two channel correlation receiver to which phase modulation and synchronous detection have been added is examined. Practical formulae for evaluating the improvements are presented

Spiga, D., Battistelli, E., Boella, G., Gervasi, M., Zannoni, M., Sironi, G. (2002). CMB observations: improvements of the performance of correlation radiometers by signal modulation and synchronous detection. NEW ASTRONOMY, 7(3), 125-134 [10.1016/S1384-1076(02)00099-4].

CMB observations: improvements of the performance of correlation radiometers by signal modulation and synchronous detection

BOELLA, GIULIANO FILIPPO;GERVASI, MASSIMO;ZANNONI, MARIO;SIRONI, GIORGIO
2002

Abstract

Observation of the fine structures (anisotropies, polarization, spectral distortions) of the Cosmic Microwave Background (CMB) is hampered by instabilities, 1/f noise and asymmetries of the radiometers used to carry on the measurements. Addition of modulation and synchronous detection allows to increase the overall stability and the noise rejection of the radiometers used for CMB studies. In this paper we discuss the advantages this technique has when we try to detect CMB polarization. The behaviour of a two channel correlation receiver to which phase modulation and synchronous detection have been added is examined. Practical formulae for evaluating the improvements are presented
Articolo in rivista - Articolo scientifico
Cosmic microwave background; Radiometers; Techniques: polarimetric; Methods: statistical
English
125
134
10
Spiga, D., Battistelli, E., Boella, G., Gervasi, M., Zannoni, M., Sironi, G. (2002). CMB observations: improvements of the performance of correlation radiometers by signal modulation and synchronous detection. NEW ASTRONOMY, 7(3), 125-134 [10.1016/S1384-1076(02)00099-4].
Spiga, D; Battistelli, E; Boella, G; Gervasi, M; Zannoni, M; Sironi, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/3851
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