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In this study we use narrow-band radio receivers recently installed at St Johns, New Foundland, Canada, and south of the Antarctic Peninsula, in order to support the recent NASA BARREL x-ray balloon campaigns that have taken place in Antarctica. These receivers form part of the wider AARDDVARK network. AARDDVARK receivers can detect near-by perturbations in subionospheric radio wave propagation conditions...
We present images of Saturn at wavelengths of 0.35, 2.0, 3.6, and 6.1 cm taken in 1990-1995. These include the first radio images of the planet's entire southern hemisphere, which is shown to be ~5% brighter than the northern at 6.1 and 2.0 cm, and possibly at 0.35 cm. The latitudinal brightness distribution varies substantially over time. The bright band at latitude 30 o N seen throughout...
Jupiter was observed before, during, and after the July 1994 impacts of Comet P/Shoemaker–Levy 9. Observations were made with the HartRAO 26-m antenna at 3.5 and 6.0 cm. In agreement with observations at other wavelengths, an increase in the total flux density was seen at both wavelengths during the impact week, followed by a slow decay. At 6.0 cm the nonthermal flux density was found to increase...
Radio telescopes at Green Bank, West Virginia and Parkes, Australia observed Jupiter's 20-cm radiation before, during, and after the impacts of Comet P/Shoemaker–Levy 9. The average nonthermal intensity increased from about 5.3 Jy before the SL9 impacts to 6.4 Jy afterwards (normalized to 4.04 AU), and began decreasing exponentially after the impacts with a time scale of 115 ± 15 days (assuming the...
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