%0 Conference Proceedings
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@nexthigherunit 8JMKD3MGPCW/3EU29DP 8JMKD3MGPCW/3EUFCFP
%@resumeid
%@resumeid 8JMKD3MGP5W/3C9JHUD
%@resumeid
%@resumeid 8JMKD3MGP5W/3C9JH3D
%B Assembly of COSPAR and y 2010.
%X The Southern Regional Space Research Center  CRS/INPE-MCT in collaboration with the Santa Maria Space Science Laboratory  LACESM/CT-UFSM, in Santa Maria, RS, South of Brazil, are interested in developing low frequencies radio telescopes and radio interferometer systems based on the concept of phased array interferometric stations. Some studies have been performed to analyze the  possibility to install Low Frequency Array  LOFAR stations at the site of the Southern Space Observatory  SSO/CRS/INPE-MCT (29.4°S, 53.8°W, 480m), in São Martinho da Serra, which is approximately 54 km distant  from the city of Santa Maria, in Rio Grande do Sul state. Initially, the motivations for monitoring the Electromagnetic Spectrum at the Site of SSO, in the low frequencies ranges, aimed to demonstrate which frequency spectral bands were free of artificial radio noise interference, and to verify the potential existence of nature radio interference in the site. Currently, besides this motivation, it has being verified the possibility to install, at the SSO, modern LOFAR stations. The power Electromagnetic Spectrum density monitoring has been conducted periodically since 1992. The spectrum monitoring results showed that the SSO site area was free from artificial and natural radio interference, which was important for choosing the Observatory location and for its construction. This is  positive for implementation of a modern version of a radio interferometric phased array such as employed in the construction of the LOFAR, following the European way of implementation. The monitoring results have demonstrated that the characteristics of the Electromagnetic Spectrum in the SSO are similar to those of the European LOFAR stations. In order to monitoring the interference level at the Observatorys site it is perfomed a periodic data acquisition on the radio frequency range 10  240 MHz. The procedures to determine the radio noise level were accomplished by  using a spectrum analyzer and an omnidirectional antenna. The methodology of data acquisitions was to amplify the signal from the antenna, then evaluate this signal in spectrum analyzer, through a GPIB. The data is transmitted from SSO to the Radio Frequency and Telecommunication Laboratory at the Southern Regional Space Research Center  CRS/INPE - MCT, in Santa Maria, RS, for further analysis and database, allowing the monitoring of the Electromagnetic Spectrum power for long periods. The monitoring of the radio interference level in the SSO aims to gather spectral data for the Observatorys Site qualification as a radio quite site for installation of radio astronomy instrumentation, radio free of radio noise. Currently, by means of spectral data analysis, one can conclude that the SSOs site is electromagnetic compatible with that of the LOFAR systems. Therefore, it has been considered the possibilities to implement the construction of some LOFAR stations, similar to the Europeans, at the Southern Space Observatory. Nowadays, is being developed an interferometric array similar to LOFAR Prototype Station  LOPES, using active antennas thin inverted-V dipole, designed to cover the sub-100 MHz frequency range of LOFAR.
%@mirrorrepository sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53
%T The southern space observatory - a Brazilian ground-based facility for low frequency observations
%@secondarytype PRE CI
%8 18-25 July
%@usergroup administrator
%@usergroup seeger05
%@group CRS-CCR-INPE-MCT-BR
%@group CRS-CCR-INPE-MCT-BR
%@group
%@group DGE-CEA-INPE-MCT-BR
%@group CRS-CCR-INPE-MCT-BR
%3 Microsoft Word - COSPAR 2010 Abstract PCB1 Guilherme Simon da Rosa.pdf
%@secondarykey INPE--PRE/
%2 sid.inpe.br/mtc-m19/2011/01.09.01.49.39
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Universidade Federal de Santa Maria
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@versiontype publisher
%4 sid.inpe.br/mtc-m19/2011/01.09.01.49
%@documentstage not transferred
%D 2010
%S Abstracts
%A Rosa, Guilherm Simon da,
%A Schuch, Nelson Jorge,
%A Gomes, Natanael Rodrigues,
%A Echer, Ezequiel,
%A Fagundes, Igor,
%A Stekel, Tardelli Ronan Coelho,
%A Antunes, Cássio Espíndola,
%A Denardini, Clezio M.,
%C Bremen, Alemanha
%@area CEA