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Site evaluation and RFI spectrum measurements in Portugal at the frequency range 0.408–10 GHz for a GEM polarized galactic radio emission experiment |
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| Authors: | Rui Fonseca, Domingos Barbosa, Luis Cupido, Ana Mour o, Dinis M. dos Santos, George F. Smoot,Camilo Tello |
| Affiliation: | aCENTRA, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal bDepartamento Electrónica e Telecomunicações, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal cInstituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal dCentro de Física da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal eAstrophysics Group, MS 50-205, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USA fPhysics Department, University of California, 366 Le Conte Hall, Berkeley, CA 94720, USA gInstituto Nacional de Pesquisas Espaciais, Divisão de Astrofísica, Caixa Postal 515, 12210-070, São José dos Campos SP, Brazil hCentro de Fusão Nuclear, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal |
| Abstract: | We probed for radio frequency interference (RFI) at three potential galactic emission mapping experiment (GEM) sites in Portugal using custom made omnidirectional disconic antennas and directional pyramidal horn antennas. For the installation of a 10-m dish dedicated to the mapping of polarized galactic emission foreground planned for 2005–2007 in the 5–10 GHz band, the three sites chosen as suitable to host the antenna were surveyed for local radio pollution in the frequency range 0.01–10 GHz. Tests were done to look for radio broadcasting and mobile phone emission lines in the radio spectrum. The results show one of the sites to be almost entirely RFI clean and showing good conditions to host the experiment. |
| Keywords: | Radio frequency interference Site testing Cosmic microwave background Polarization |
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