RFI Test Observations at a Candidate SKA Site in China
Radio frequency interference (RFI) test observations were carried out at one of the candidate Square Kilometre Array (SKA) sites in Guizhou province, following the “RFI Measurement Protocol for Candidate SKA Sites” (hereafter RFI protocol). All data (raw and calibrated) are preserved in some suitable format, such as that set by the international RFI working group of the Site Evaluation and Selection Committee (SESC). An RFI test in December 2003 was performed according to Mode 1 of the RFI Protocol, in order to identify technical difficulties which might arise during a co-ordinated RFI measurement campaign over a period of 1 year. In this paper we describe the current equipment, observational technique and data presentation. The preliminary results demonstrate that the RFI situation at Dawodang depression in Guizhou province makes it quite a promising location for the proposed SKA. Furthermore, the first session of the RFI monitoring program, whichwas made in May 2004, showed that a complete RFI measurement including both modes 1 and 2 of the RFI Protocol would take about 2 weeks. The possible ways to minimize some limitations of the current equipment are also discussed, which will enable us to meet the RFI protocol. kg]Keywords kw]antenna kw]measurement
Unable to display preview. Download preview PDF.
- Ambrosini, R., Beresford, R., Boonstra, A.-J., Ellingson, S. and Tapping, K.: May 23, 2003, RFI measurement protocol for candidate SKA sites, internal report from the SKA International Working Group on RFI Measurements.Google Scholar
- Peng, B., Strom, R. G. and Nan, R.: 2001, in: Cohen R. J. and Sullivan W. T. (eds.), IAU Symposium, p. 276, Vol. 196.Google Scholar