Excising terrestrial radio interference in low frequency radio astronomy

Radio Frequency Interference Mitigation in Radio Astronomy

Receivers for Low-Frequency Radio Astronomy

The next generation of large telescopes for low-frequency radio astronomy will consist of tens of thousands of broadband antennas, each individually instrumented with receivers having large tuning range and instantaneous bandwidth. Because the number of receivers is very large, their cost must be minimized; however the receivers must be also be able to cope with the severe interference associat...

Suppression of Radio Frequency Interference in Low Frequency SAR

To acquire high resolution in airborne radar imaging, either minuscule wavelengths or incredibly large antennas must be used. Another way of solving that issue is to utilise moving radar to realise the effect of a large aperture; a technique called synthetic aperture radar (SAR). CARABAS is a low frequency SAR system, operating in the band of 20 – 90 MHz, designed to minimise the influence from...

Radio Frequency Interference

We describe the nature of the interference challenges facing radio astronomy in the next decade. These challenges will not be solved by regulation only, negotiation and mitigation will become vital. There is no silver bullet for mitigating against interference. A successful mitigation approach is most likely to be a hierarchical or progressive approach throughout the telescope and signal condit...

OLFAR - Orbiting Low Frequency Antennas for Radio astronomy

New interesting astronomical science drivers for very low frequency radio astronomy have emerged, ranging from studies of the astronomical dark ages, the epoch of reionization, exoplanets, to ultra-high energy cosmic rays. Huge efforts are currently made to establish low frequency Earthbound instruments, since today’s technology is able to support this. However, astronomical observations with E...