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Sharp Lab Radio Jove Telescope Steven Day (Newark High School) Leonard Shulman (University of Delaware). Delaware Space Grant Consortium. Construction and Implementation. Data and the Future. Background

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  1. Sharp Lab Radio Jove Telescope Steven Day (Newark High School) Leonard Shulman (University of Delaware) Delaware Space Grant Consortium Construction and Implementation Data and the Future Background Deashsa Barret under the supervision of Gerald Poirier constructed the Radio Jove receiver and mounted a single dipole antenna on the roof of Sharp Laboratory in 2006. The single 1/2 wave dipole with a height of just over 1 wave length (15M @ 20.1MHz) gave their system a north-south receiver pattern similar to these plots but with a factor of 2 lower pointing angle of approximately 16˚ above the horizon. Data analysis is complicated by the lack of good sources during August to November. The sun has been quiet, and Jupiter is close to the galacitc center. Sample data, 10 point average, Oct 11-15, 2008: During the summer of 2008, Steven Day repaired, re-established and expanded the first radio telescope by adding a second south facing dipole and coupling it to the original antenna using a 1/3 wave phasing cable. This in combination with the 1 wave height give a pointing angle of only about 16 ˚ above the horizon. The Two Dipole Antennas The following table shows the times during which the sun, galaxy center, and Jupter were crossing the meridian. We searched our data and found no obvious periodic correlations. Also a comparison with RJ data archives for November 3, 2008 showed nothing. The Radio Jove receiver is located in the basement of Sharp Lab. The downlink cable was determined to be 293.4’ (9 lambda) long by means of measuring pulse reflections. This is longer than optimal and may be responsible for the poor signal to noise ratio. Deashsa and Jerry were able to capture this set of 2007 Perseid bursts. Dual Dipole Pattern For the future we propose the following: Shorten the downlead by moving the receiver and computer to the 3rd floor to improve S/N. Antenna calibration with a known source to determine the sensitivity and pattern. The theoretical north-south pattern for the new configuration is similar to these plots, but with an approximate 16˚ azimuthal angle, a higher gain in the main lobe, a narrower acceptance angle, and a corresponding reduction on the north lobe.

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