A Web-based Portable RFI Monitor for LWA Site Selection

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We describe a portable system for monitoring radio frequency interference in the 10-100 MHz range. The system consists of a discone antenna, GPS module, low-noise pre-amplifier, and commercial spectrum analyzer controlled by Labview VI (virtual instrument) modules running on a notebook PC. Dynamic (frequency-time) spectra are recorded at user-specified intervals and recorded as FITS-format binary tables. The system is controllable either on-site or remotely using a web-based interface. We will use this portable system to conduct a brief RFI survey of several potential sites for Long Wavelength Array (LWA) array elements in southwestern New Mexico during Fall 2006. The results of this survey will be summarized.

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