WorldCat Identities

Kurth, W. S.

Overview
Works: 72 works in 96 publications in 1 language and 428 library holdings
Genres: Conference papers and proceedings 
Roles: Author
Publication Timeline
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Most widely held works by W. S Kurth
Plasma diagnostics package. final science project( Book )

3 editions published in 1988 in English and held by 118 WorldCat member libraries worldwide

A determination of the source of Jovian hectometric radiation via occultation by Ganymede( Book )

1 edition published in 1997 in English and held by 84 WorldCat member libraries worldwide

Wave-particle interactions in the magnetosphere of Uranus by W. S Kurth( Book )

3 editions published in 1988 in English and held by 73 WorldCat member libraries worldwide

Plasma diagnostics package. final report( Book )

1 edition published in 1988 in English and held by 60 WorldCat member libraries worldwide

Planetary radio emissions VII : proceedings of the 7th international workshop on planetary, solar and heliospheric radio emissions held at Graz, Austria, September 15-17, 2010 by International workshop on planetary radio emissions( Book )

1 edition published in 2011 in English and held by 4 WorldCat member libraries worldwide

Narrowband Electromagnetic Emissions from Jupiter's Magnetosphere by Donald A Gurnett( Book )

3 editions published in 1982 in English and held by 3 WorldCat member libraries worldwide

Recent studies of wideband plasma wave data from the Voyager 1 and 2 flybys of Jupiter have revealed the existence of narrowband radio emissions in the frequency range 1 -12 kHz. These narrowband emissions are very similar to narrowband emissions previously discovered in the magnetospheres of Earth and Saturn, and are believed to be produced by mode conversion from electron cyclotron waves near the upper hybrid resonance frequency. This mode conversion process is apparently one of the basic mechanisms for generating planetary radio emissions. In this paper we describe the characteristics of the Jovian narrowband emissions and discuss possible mechanisms for generating these emissions. In this paper we describe the characteristics of the Jovian narrowband emissions and discuss possible mechanisms for generating these emissions
Plasma Waves Near Saturn: Initial Results from Voyager 1 by Donald A Gurnett( Book )

3 editions published in 1981 in English and held by 3 WorldCat member libraries worldwide

The Voyager 1 plasma wave instrument detected many familiar types of plasma waves during the encounter with Saturn, including ion-acoustic waves and electron plasma oscillations upstream of the bow shock, an intense burst of electrostatic noise at the shock, and chorus, hiss, electrostatic (n + 1/2)fg waves and UHR emissions in the inner magnetosphere. A clock-like Saturn rotational control of low-frequency radio emissions was observed, and evidence was obtained of possible control by the moon Dione. Strong plasma wave emissions were detected at the Titan encounter indicating the presence of a turbulent sheath extending around Titan, and UHR measurements of the electron density show the existence of a dense plume of plasma being carried downstream of Titan by the interaction with the rapidly rotating magnetosphere of Saturn. (Author)
High-Resolution Spectrograms of Ion Acoustic Waves in the Solar by W. S Kurth( Book )

3 editions published in 1978 in English and held by 3 WorldCat member libraries worldwide

Ion-acoustic waves, similar to those detected by the helios spacecraft from 0.3 to 1.0 AU, have now been detected by the Voyager spacecraft in the solar wind out to heliocentric radial distances of 1.7 AU. High bit rate waveform measurements provide the first high resolution, frequency-time spectrograms of these waves. The Voyager spectrograms show that the ion-acoustic waves consist of narrow-band bursts which last for a few seconds or less. The center frequency of the bursts can fluctuate rapidly in frequency, usually in the range between the electron and ion plasma frequency f sub p( - ) and f sub p(+). (These waves have been previously referred to as f sub p(+) <f <f sub p( - ) noise.)
Comparative observations of plasma waves at the outer planets by W. S Kurth( Book )

2 editions published in 1990 in English and held by 2 WorldCat member libraries worldwide

Detection of nonthermal continuum radiation in Saturn's magnetosphere by W. S Kurth( Book )

2 editions published in 1982 in English and held by 2 WorldCat member libraries worldwide

A detailed analysis of high resolution wideband data from the Voyager 1 and 2 plasma wave receivers has revealed the presence of heretofore undiscovered nonthermal continuum radiation trapped within the Saturnian magnetosphere. The discovery of Saturnian trapped continuum radiation fills a disturbing void in the Saturnian radio spectrum. On the basis of observations at both the Earth and Jupiter it was expected that continuum radiation should be a pervasive signature of planetary magnetospheres in general. Special processing of the Voyager I plasma wave data at Saturn has now confirmed the existence of weak emissions that have a spectrum characteristics of trapped continuum radiation. Similar radiation was also detected by Voyager 2; however, in this case it is not certain that Saturn was the only source. Considerable evidence exists which suggests that Saturn may have been immersed in the Jovian tail during the Voyager 2 encounter, so tha Jupiter may provide an additional source of the continuum radiation detected by Voyager 2. (Author)
Narrowband electromagnetic emissions from Saturn's magnetosphere by Donald A Gurnett( Book )

2 editions published in 1981 in English and held by 2 WorldCat member libraries worldwide

During the Voyager 1 flyby of Saturn a series of narrowband electromagnetic emissions were detected by the plasma wave instrument coming from the inner region of the magnetosphere in the frequency range from 3 to 30 kHz. These emissions have many close similarities to continuum radiation detected in the Earth's magnetosphere and narrowband kilometric radiation (nKOM) detected in the Jovian magnetosphere. Based on the close similarity to the terrestrial continuum radiation the Saturn narrowband emissions are interpreted as being generated by mode conversion from intense electrostatic waves at half-integral harmonics of the electron gyrofrequency. The observed frequency spacing suggests that the emissions are being generated near the moons Tethys, Dione and Rhea, probably in regions of large plasma density gradients associated with boundaries of the plasma sheet. (Author)
Sporadic narrowband radio emissions from Uranus by W. S Kurth( Book )

2 editions published in 1986 in English and held by 2 WorldCat member libraries worldwide

Among several different types of radio emissions discovered at Uranus during the Voyager 2 encounter in January 1986 is a very sporadic, bursty signal which consists of very narrow bands lying in the frequency range from about 3 to 10 kHz. The bursty emission was virtually undetectable from the dayside portion of the Voyager 2 trajectory but was observed out to beyond 300 RU during the outbound trajectory through the pre-dawn sector. While the narrowband tones making up this emission are reminiscent of escaping continuum radiation observed near Earth, Jupiter and Saturn, the Uranian signals show large amplitude variations on time scales of a second suggesting a very different type of generation mechanism. (Author)
Electrostatic waves in the Jovian magnetosphere by W. S Kurth( Book )

1 edition published in 1979 in English and held by 2 WorldCat member libraries worldwide

Detailed observations of the source of terrestrial narrowband electromagnetic radiation by W. S Kurth( Book )

2 editions published in 1982 in English and held by 2 WorldCat member libraries worldwide

We present detailed observations of a region near the terrestrial plasmapause where narrowband electromagnetic radiation (previously called escaping nonthermal continuum radiation) is being generated. These observations show a direct correspondence between the narrowband radio emissions and electron cyclotron harmonic waves near the upper hybrid resonance frequency. In addition, electromagnetic radiation propagating in the Z-mode is observed in the source region which provides an extremely accurate determination of the electron plasma frequency and, hence, density profile of the source region. The data strongly suggest the electrostatic waves and not Cerenkov radiation are the source of the banded radio emissions and clearly define the coupling mechanism which must be described by any viable theory
Recent observations of the very low frequency interplanetary radio emission by W. S Kurth( Book )

2 editions published in 1986 in English and held by 2 WorldCat member libraries worldwide

Observations of radio emissions in the frequency range of 2 to 3 kHz have been made in the distant heliosphere by the Voyager 1 and 2 plasma wave instruments. Based primarily on wideband observations made periodically throughout the cruise phases of the missions the radio emission, first observed in 1982, appears to have been present almost continuously since 1983. The spectrum is complex, usually showing two peaks, one near 2 and another near 3 kHz. Occasionally, only one of the peaks is observed. A possible source for the radio emissions is the terminal shock in the outer heliosphere
The Control of Saturn's Kilometric Radio Emission by Dione by W. S Kurth( Book )

2 editions published in 1981 in English and held by 2 WorldCat member libraries worldwide

Observations of Saturn's kilometric radio emissions obtained by the voyager 1 plasma wave receiver during the encounter of the Saturnian system in late 1980 reveal a strong but apparently transitory control by the orbital phase angle of Dione. At 56 kHz the effect of the Dione control is particularly evident during a two-week period centered roughly on closet approach. The intensity of the Saturnian emission is suppressed sharply when Dione is in the local dust sector. We propose that the transitory nature of the Dione control is actually a geometric effect and that a time-variable plasma torus associated with Dione can explain most of the observed details of the Dione modulation by creating a shadow zone near the equatorial plane. (Author)
Voyager observations of Jupiter's distant magnetotail( Book )

2 editions published in 1980 in English and held by 2 WorldCat member libraries worldwide

Observations of nonthermal continuum radiation by Voyager 1 and 2 at large distances from Jupiter have led to the identification of brief encounters with the Jovian magnetosphere at distances greater than 700 RJ and in directions substantially far from the Jupiter-Sun line. In addition, a number of examples of continuum radiation apparently trapped in local density depressions in the solar wind are observed. Simultaneous measurements by the Voyager plasma instrument have verified the distant magnetotail crossings and are used to correlate the occurrence of trapped continuum radiation events within solar wind density rarefractions. The Voyager observations of the distant Jovian magnetotail are compared with observations in the distant terrestrial magnetosphere and also with observations of the plasma tails of comets. One variable explanation of the observations is that the Jovian tail consists of filamentary structures, some of which extend to large distances in the pre-dawn direction. The observations of continuum radiation trapped in low-density regions of the solar wind suggest that Voyager may at times be connected to the distant tail by a low-density trough which acts as a wave guide and allows radiation from the tail to reach the spacecraft. This may provide an indirect method of detecting the tail extending more than 2 AU downstream from Jupiter. (Author)
Chorus-Related Electrostatic Bursts at Jupiter and Saturn by Lee A Reinleitner( Book )

2 editions published in 1983 in English and held by 2 WorldCat member libraries worldwide

Analyses of the wideband plasma wave data obtained by Voyagers 1 and 2 at Jupiter and Saturn have revealed electrostatic bursts similar to those recently discovered at Earth in association with whistler-mode chorus. In all three magnetospheres the bursts are characterized by sporadic emissions near or slightly below the electron plasma frequency with bandwidths ranging from 10% to more than 50% of the center frequency. The events found at Jupiter occur in the middle magnetosphere during both the dayside as well as the early morning passes. At Saturn, the bursts occurred in the outer regions of the magnetosphere during the dayside pass. In each of the events analyzed, evidence exists for modulation of the electrostatic bursts by a low frequency wave, presumably chorus. One of the observations gained at Jupiter includes the detection of a low-frequency band at the proper frequency for chorus. Detailed waveform analysis confirms that this band does, indeed, modulate the electrostatic bursts. Based on the present understanding of the terrestrial observations it is believed that the electrostatic bursts are generated by an electron beam trapped in Landau resonance with the chorus. (Author)
Periodic amplitude variations in Jovian continuum radiation by W. S Kurth( Book )

2 editions published in 1986 in English and held by 2 WorldCat member libraries worldwide

An analysis of periodic variations in the amplitude of continuum raidation trapped in the Jovian magnetosphere shows structure with periods near both five and ten hours. Contrary to a plausible initial idea, the continuum amplitudes are not organized by position of the observer relative to the dense plasma sheet. Instead, there seem to be preferred orientations of system III longitude with respect to the direction to the sun which account for the peaks. This implies a clock-like modulation of the continuum radiation intensity as opposed to a searchlight effect. The importance of the dipole longitude-solar wind alignment to the amplitude of the continuum radiation implies the source region of the radiation is near the magnetopause and may tie the generation of the radio waves to the clock like modulation of energetic electron fluxes from Jupiter
A free-energy source for intense electrostatic waves( Book )

1 edition published in 1979 in English and held by 2 WorldCat member libraries worldwide

 
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English (40)