Radar interference blanking in radio astronomy using a Kalman tracker

Radar Interference Blanking in Radio Astronomy using a Kalman Tracker

Radio astronomical observations of highly Doppler shifted spectral lines of neutral hydrogen and the hydroxyl molecule must often be made at frequencies allocated to pulsed air surveillance radar in the 1215-1350 MHz frequency range. The Green Bank telescope (GBT) and many other observatories must deal with these terrestrial signals. Even when strong radar fixed clutter echoes are removed, ther...

Mitigation of Radar Interference in L-band Radio Astronomy

The 1215–1400 MHz band is important for spectroscopy of H i at high redshift, pulsar work, and SETI. Observations at these frequencies are complicated by pulsed interference from ground-based aviation radars. In this paper, we characterize one such radar received at the Arecibo Observatory using coherently sampled data sets obtained during a recent observation. Using these data, we demonstrate ...

Radio Frequency Interference Mitigation in Radio Astronomy

Detection and Blanking of Gsm Interference in Radio-astronomical Observations

Radio-astronomical observations are increasingly disturbed by man-made communication signals, satellite and broadcast services. In particular, the GSM band is a highly saturated domain, full with interferers which are much stronger than radio astronomical signals. In this paper we propose a strategy to reduce this interference using its non-stationary nature. We describe a multichannel interfer...

Mitigation of Continuous Interference in Radio Astronomy Using Spatial Filtering

The contamination of radio astronomical measurements by man-made Radio Frequency Interference (RFI) is becoming an increasingly serious problem and therefore the application of interference mitigation techniques is essential. Most current techniques address impulsive or intermittent interference and are based on time-frequency detection and blanking. Continually present interferers cannot be cu...