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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 580-580 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As other investigations progressed, however, it became clear that, not only did the radiation become much less intense at higher frequencies (see, for example, accounts of 2 7-Mc/s observations by Franklin and Burke4, Gardner and Shain5, and Carr et al.6), it also became much less prolific. I have ...
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 381-381 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A further investigation of the Jupiter radio noise has been made in this laboratory at 18-0 Mc./s., using an eight-dipole aerial array having a beam width, to the half-power points, of about 30 in the east-west direction. A series of daily records were taken from December 31, 1956, to March 8, 1957 ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 188 (1960), S. 924-925 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Radiation appears to be emitted from one or more localized regions on Jupiter1. The radiation from these sources is emitted within a limiting angle, and this has been interpreted2 as indicating the presence of an ionosphere in the upper atmosphere of Jupiter. Observations by Franklin and Burke3, ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 211 (1966), S. 808-810 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AN experiment has been conducted to study the characteristics of the very short duration pulses which are sometimes observed in the decametre wave radiation from Jupiter. These pulses have been observed on a number of occasions during the 1965-66 apparition. Preliminary results indicate that the ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 171-171 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A series of polarization observations has recently been commenced at 16, 18, 22 and 26 Mc/s using azimuthally mounted crossed five-element Yagi aerials. Some of the equipment was installed during 1962 and various preliminary observations were undertaken at that time, consistent with the ...
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Solar physics 45 (1975), S. 459-465 
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Solar type III bursts have been observed at fixed frequencies of 18, 22, 26 and 36 MHz during the period 1970–1974. 103 profiles have been analyzed in the manner introduced by Aubier and Boischot (1972) whose results are generally confirmed. Average values for the exciter function duration were found for each frequency to be respectively 16.6, 14.7, 10.2 and 8.1 s, and for the decay time constant 3.6, 3.1, 2.3 and 1.8 s. Average peak-to-peak frequency drifts were found to be - 1.9,- 2.1, and - 3.5 MHz s−1 for centre frequencies of 20, 22, and 31 MHz, respectively. The decay time-constant appears to bear approximately the same linear relationship to the exciter function duration at each of the four frequencies studied.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Solar physics 45 (1975), S. 467-476 
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Observations of type III burst profiles at 18, 22, 26 and 36 MHz, by Barrow and Achong (1975), are used to calculate the form of the exciter function. The burst profile is treated as the convolution of an exciter function and an exponential decay function. The average form of the exciter profile is obtained directly from calculated profiles and further inferred from the first three statistical moments. Normalised average profiles of the burst and the exciter are presented for each frequency. The analysis shows that over the frequency range 18–36 MHz, (1) the exciter function possesses negative skewness, (2) the shapes of burst profiles and exciter profiles are approximately constant and, (3) burst peak time varies linearly with height in the corona. It is suggested that the passage of the exciting electron stream through field-dominated and flow-dominated coronal regions has different effects on the profiles.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Solar physics 90 (1984), S. 111-115 
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High-time resolution spectral measurements of solar radio emission close to 264 MHz are reported. Instrumental resolutions of the order of a few kHz in frequency and tenths of milliseconds in time were used to resolve the burst fine structure in the time-frequency plane. Fine structures, having narrow bandwidths and durations of some 5 to 30 ms, have been observed mostly in association with type I and type III bursts. These very short duration bursts have negative frequency drifts of about - 50 to- 60 MHz s-1. They can occur individually or in small groups where they sometimes display a quasi-periodicity of a few milliseconds.
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 267 (1977), S. 306-306 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-Within the past few years the electronic timer, capable of responding to time differences of .001s, has replaced the stop-watch, capable of responding to time differences of perhaps .05s. In world class swimming events are now decided and records are established by amounts down to .Ols. ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 637-638 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] JUPITER has been monitored at 18 Mc/s for 16 h daily during 133 days in 1963. This was achieved by combining observations from three stations in the United States, in Great Britain and in South Africa. Correlation coefficients between Jupiter activity and various indicators of solar activity have ...
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