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RFI measurements in progress
18th November 2018
RFI measurements at potential HF radar sites
RFI measurements at potential HF radar sites

Radio Frequency Interference (RFI) refers to the unintended reception of a signal transmitted by an external source. RFI contaminates remote measurements by adding spurious noise of unpredictable characteristics. This may cause gaps in the data collected by the HF radars, hence it is essential to know the existing RFI at the proposed radar sites.

RFI tests were conducted over long periods of time at Ghar Lapsi in Malta and Ta' Cenc in Gozo, at the locations where the new radars will be installed. During this analysis, the existing background signals at 9.33MHz and 13.5MHz were continuously recorded over a number of days. The huge amount of information (about 1TB) was processed to extract a time series of the frequency spectra. This will allow experts to identify the cleanest band in which to make HF Radar measurements.

Radio Frequency Interference test in progress
Radio Frequency Interference test in progress