FASR Subsystem Testbed

Details FASR Subsystem Testbed FASR Subsystem Testbed

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.0602l&link_type=abstract

American Astronomical Society, SPD meeting #37, #6.02; Bulletin of the American Astronomical Society, Vol. 38, p.225

Astronomy and Astrophysics

Astronomy

Scientific paper

The construction of the Frequency Agile Solar Radiotelescope (FASR) Subsystem Testbed (FST) and first results are described. Three antennas of Owens Valley Solar Array (OVSA) are upgraded with the newly designed, state of art technology. The 1-9 GHz RF signal from the feed is transmitted through the fiber optical system to the control room. Then it is downconverted to a 500 MHz single-sideband signal that can be tuned across the 1-9 GHz RF band. The data are sampled with an 8-bit, 1 GHz sampling-rate digitizer, and further saved to the hard disk. The correlated (phase and amplitude) spectra are derived through offline software. As a prototype of the FASR system, FST provides the opportunity to study the design, calibration, and interference-avoidance requirements of FASR. FST provides, for the first time, the ability to perform broadband imaging spectroscopy with high spectral, temporal and moderate spatial resolution. With this three element interferometer, we have the ability to determine the location of simple source structures with very high time resolution (20 ms) and frequency resolution ( <1 MHz) as well as the dynamic spectrum. Initial examples of geostationary satellite, GPS satellite and solar observations are presented.

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