Robert Helliwell

Q: What Schools Are Affiliated With Robert Helliwell

Robert Helliwell is affiliated with the following schools: California Institute of Technology, Stanford University

Robert Helliwell's AcademicInfluence.com Rankings

Robert Helliwell

Engineering

#1264

World Rank

#1901

Historical Rank

#499

USA Rank

Electrical Engineering

#248

World Rank

#285

Historical Rank

#105

USA Rank

engineering Degrees

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Engineering

Robert Helliwell's Degrees

Masters Electrical Engineering Stanford University
Bachelors Electrical Engineering Stanford University

Why Is Robert Helliwell Influential?

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According to Wikipedia, Robert A. Helliwell was an electrical engineer and professor at Stanford University. He was one of the pioneering scientists in the study of whistlers and related ionospheric phenomena. Early life Helliwell was born in Red Wing, Minnesota, on September 2, 1920. He and his mother moved to Palo Alto, California after his father died. Helliwell and his wife, whom he knew in high school, were both undergraduates at Stanford University.

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Robert Helliwell's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Whistlers and Related Ionospheric Phenomena (1965) (769)
Low‐frequency magnetic field measurements near the epicenter of the Ms 7.1 Loma Prieta Earthquake (1990) (591)
A theory of discrete VLF emissions from the magnetosphere (1967) (444)
Magnetospheric chorus - Occurrence patterns and normalized frequency (1976) (306)
Banded chorus - A new type of VLF radiation observed in the magnetosphere by OGO 1 and OGO 3. (1969) (280)
Whistler-induced amplitude perturbation in VLF propagation (1973) (249)
Nonlinear pitch angle scattering of energetic electrons by coherent VLF waves in the magnetosphere (1978) (232)
VLF wave injection into the magnetosphere from Siple Station, Antarctica (1974) (226)
Electron precipitation associated with discrete very‐low‐frequency emissions (1971) (201)
A theory of trapping of whistlers in field‐aligned columns of enhanced ionization (1960) (190)
Lightning-induced electron precipitation (1984) (162)
VLF line radiation in the Earth's magnetosphere and its association with power system radiation (1975) (156)
Whistler-mode emissions on the OGO 1 satellite (1969) (154)
The plasma wave and quasi-static electric field instrument /PWI/ for dynamics Explorer-A (1981) (114)
Low-frequency waves in the magnetosphere (1969) (114)
Direct observation of radiation belt electrons precipitated by the controlled injection of VLF signals from a ground‐based transmitter (1983) (102)
A feedback model of cyclotron interaction between whistler‐mode waves and energetic electrons in the magnetosphere (1973) (98)
Electron precipitation zones around major ground‐based VLF signal sources (1984) (96)
Subionospheric VLF/LF phase perturbations produced by lightning-whistler induced particle precipitation (1985) (90)
Low‐frequency noise observed in the distant magnetosphere with OGO 1 (1970) (88)
VLF wave stimulation experiments in the magnetosphere from Siple Station, Antarctica (1988) (87)
'Correlations between lambda4278 optical emissions and VlF wave events observed at L~4 in the Antarctic' (1980) (85)
Conjugacy of electron microbursts and VLF chorus (1981) (84)
Power threshold for growth of coherent VLF signals in the magnetosphere (1980) (82)
The Formation by Electric Fields of Field‐Aligned Irregularities in the Magnetosphere (1971) (81)
Magnetospheric Effects of Power Line Radiation (1978) (76)
Magnetospheric chorus: Amplitude and growth rate (1975) (72)
Artificially stimulated very‐low‐frequency radiation from the ionosphere (1964) (70)
Precipitation of radiation belt electrons by man-made waves: A comparison between theory and measurement (1985) (70)
The “nose” whistler—A new high‐latitude phenomenon (1956) (69)
VLF wave growth and discrete emission triggering in the magnetosphere - A feedback model (1982) (67)
Association between Auroræ and Very Low-Frequency Hiss Observed at Byrd Station, Antarctica (1960) (63)
Characteristics of wave‐particle interactions during sudden commencements: 1. Ground‐based observations (1990) (61)
Controlled stimulation of VLF emissions from Siple Station, Antarctica (1983) (58)
Ultra‐low frequency magnetic field measurements in southern California during the Northridge Earthquake of 17 January 1994 (1994) (55)
Nonducted coherent VLF waves and associated triggered emissions observed on the ISEE-1 satellite (1981) (55)
Longitudinal variations of very‐low‐frequency chorus activity in the magnetosphere: Evidence of excitation by electrical power transmission lines (1977) (54)
Frequency‐time behavior of artificially stimulated VLF emissions (1975) (52)
A search for ELF/VLF emissions induced by earthquakes as observed in the ionosphere by the DE 2 satellite (1993) (48)
Space-time evolution of whistler mode wave growth in the magnetosphere (1990) (46)
The Modulated Precipitation of Radiation Belt Electrons by Controlled Signals from VLF Transmitters (1983) (45)
The control of the magnetosphere by power line radiation (1979) (44)
Perturbations of subionospheric LF and MF signals due to whistler‐induced electron precipitation bursts (1984) (43)
Stimulated growth of coherent VLF waves in the magnetosphere (1977) (43)
A quiet band produced by VLF transmitter signals in the magnetosphere (1977) (40)
Intensity of Discrete VLF Emissions (1970) (37)
The Stanford University ELF/VLF Radiometer Project: Measurement of the Global Distribution of ELF/VLF Electromagnetic Noise (1985) (37)
Simultaneous observations of VLF ground transmitter signals on the DE 1 and COSMOS 1809 satellites: Detection of a magnetospheric caustic and a duct (1994) (36)
Controlled VLF wave injection experiments in the magnetosphere (1974) (36)
Pulsation phenomena observed in long-duration vlf whistler-mode signals. (1971) (35)
Generation of band-limited VLF noise using the Siple transmitter: A model for magnetospheric hiss (1986) (35)
Origin of "very-low-frequency emissions" (1959) (35)
Global Measurements of Low-Frequency Radio Noise (1991) (35)
Whistler‐Triggered Periodic Very‐Low‐Frequency Emissions (1963) (34)
Variable frequency VLF signals in the magnetosphere: Associated phenomena and plasma diagnostics (1985) (34)
EXOS‐B/Siple Station VLF wave‐particle interaction experiments: 1. General description and wave‐particle correlations (1983) (34)
DE 1 observations of siple transmitter signals and associated sidebands (1985) (33)
Simultaneous triggered VLF emissions and energetic electron distributions observed on POLAR with PWI and HYDRA (2000) (32)
Characterization of the sources of VLF hiss and chorus observed on Geos 1 (1985) (31)
Whistler precursors: A possible catalytic role of power line radiation (1977) (31)
Atmospheric Whistlers (1959) (31)
Stanford–Pacific Naval Laboratory Conjugate Point Experiment (1961) (29)
Terrestrial versus Jovian VLF chorus; A comparative study (1983) (29)
Direct multiple path magnetospheric propagation: A fundamental property of nonducted VLF waves (1984) (28)
Siple station experiments on wave-particle interactions in the magnetosphere (1979) (27)
Phase measurements of whistler mode signals from the Siple VLF transmitter (1984) (26)
VLF wave-injection experiments from Siple Station, Antarctica (1987) (26)
Electron densities to 5 Earth radii deduced from nose whistlers (1960) (25)
The role of the Gendrin mode of VLF propagation in the generation of magnetospheric emissions (1995) (24)
DE‐1 observations of lower hybrid waves excited by VLF whistler mode waves (1991) (24)
A NEW MECHANISM FOR ACCELERATING ELECTRONS IN THE OUTER IONOSPHERE. Technical Report No. 4 (1960) (24)
Beat excitation of whistler mode sidebands using the Siple VLF transmitter (1986) (23)
Echo‐induced suppression of coherent VLF transmitter signals in the magnetosphere (1977) (23)
DE-1 observations of VLF transmitter signals and wave-particle interactions in the magnetosphere. [Dynamics Explorer-1 (1982) (22)
DE 1 VLF observations during activity wave injection experiments (1994) (22)
Ground observations of power line radiation coupled to the ionosphere and magnetosphere (1983) (21)
Power line radiation in the magnetosphere (1981) (21)
Very Low Frequency Emission Periods and Whistler Mode Group Delays (1964) (18)
Lower hybrid waves excited through linear mode coupling and the heating of ions in the auroral and subauroral magnetosphere (1991) (18)
The heating of suprathermal ions above thunderstorm cells (1993) (17)
Nonlinear pitch angle scattering and trapping of energetic particles during Landau resonance interactions with whistler mode waves (1984) (16)
Active Very Low Frequency Experiments on the Magnetosphere from Siple Station, Antarctica (1977) (16)
VLF pulse propagation in the magnetosphere (1980) (16)
Graphic data on the Earth's main magnetic field in space (1962) (15)
The Stanford University VLF Wave Injection Experiment on the ISEE-A Spacecraft (1978) (15)
Side‐band mutual interactions in the magnetosphere (1980) (14)
Properties of the magnetospheric hot plasma distribution deduced from whistler mode wave injection at 2400 Hz: Ground‐based detection of azimuthal structure in magnetospheric hot plasmas (1997) (14)
LATITUDINAL CUTOFF OF VLF SIGNALS IN THE IONOSPHERE. (1969) (14)
DE‐1 and COSMOS 1809 observations of lower hybrid waves excited by VLF whistler mode waves (1994) (13)
Wideband VLF electromagnetic bursts on the DE 1 satellite (1990) (13)
Emission triggering in the magnetosphere by controlled interruption of coherent VLF signals (1979) (13)
Whistler and other very low frequency phenomena associated with the high‐altitude nuclear explosion on July 9,1962 (1963) (12)
Stanford‐Seattle whistler observations (1956) (12)
Structure of VLF whistler mode sideband waves in the magnetosphere (1988) (11)
Fine structure of the lower ionosphere (1951) (10)
Probing properties of the magnetospheric hot plasma distribution by whistler mode wave injection at multiple frequencies: Evidence of spatial as well as temporal wave growth (1997) (10)
Whistlers and VLF Emissions (1968) (10)
Ionospheric Virtual Height Measurements at 100 Kilocycles (1949) (8)
Type III solar noise observed below 100 kHz on OGO 3 (1972) (8)
Universal wave polarization chart for the magneto‐ionic theory (1952) (8)
Whistlers Excited by Nuclear Explosions (1963) (8)
Nature of electrical charge carriers in the Earth's lower mantle from laboratory measurements (Paper 94GL01934) 2183 (1994) (8)
Spacecraft observations of man‐made whistler‐mode signals near the electron gyrofrequency (1977) (8)
An experiment on the threshold effect in the coherent wave instability (1992) (7)
ELF sferic occurrences in the Antarctic during a solar proton event: Case study of occurrences at Byrd Station during the event of June 9, 1968 (1980) (7)
Results from the SEEP active space plasma experiment: Effects on the ionosphere (1985) (6)
Effects of Power Line Radiation into the Magnetosphere (1979) (6)
Rapid whistler-mode wave growth resulting from frequency-time curvature (1990) (6)
A VLF transmitter on the Space Shuttle (1981) (6)
Gyroresonant wave‐particle interactions in a dynamic magnetosphere (1990) (6)
Comment on ‘On possible causes of apparent longitudinal variations in Ogo 3 observations of VLF chorus’ By C.T. Russell (1980) (6)
Active experiments from ground (1985) (6)
On the Detection of Meteors by Radio (1946) (6)
Excitation of whistler mode signals via injection of polarized VLF waves with the Siple transmitter (1992) (5)
Jikiken(EXOS-B) observation of siple transmissions (1981) (5)
Stimulation of Pc 1 geomagnetic pulsations by naturally occurring repetitive VLF activity (1980) (5)
Very-Low-Frequency Discrete Emissions received at Conjugate Points (1962) (4)
Measurements of ELF/VLF Radio Noise in Japan (1991) (4)
Triggering of whistler mode emissions by the band‐limited impulse (BLI) Associated with amplified Vlf signals from Siple Station, Antarctica (2000) (4)
Sporadic-E stratification and correlation with low-frequency soundings (1952) (4)
Siple Station, Antarctica, experiments on staircase frequency ramps as approximations to continuous ramps (1993) (4)
Wave-induced precipitation as a loss process for radiation belt particles (1985) (3)
EXOS-B/Siple Station VLF wave-particle interaction experiment (1981) (3)
VLF wave injections from the ground (1983) (3)
Coherent v.l.f. Waves in the Magnetosphere [and Discussion] (1975) (3)
A plasma wave instrument for the outer planets Grand Tour missions (1971) (3)
Radio Noise Measurements in the Long-Wave Band at Thule, Greenland (1989) (2)
U.S.A. National Committee Report, Fifteenth URSI General Assembly, Munich, September 1966: Commission 4,Magnetospheric Radio; Progress in Magnetospheric Radio (1966) (2)
WHISTLER-MODE PROPAGATION STUDIES USING NAVY VLF TRANSMITTERS (1967) (2)
GEOCYCLOTRON FEASIBILITY STUDY. (1963) (2)
Correction [to “The control of the magnetosphere by power line radiation”] (1979) (2)
Reply [to “Comment on ‘A feedback model of cyclotron interaction between whistler mode waves and energetic electrons in the magnetosphere’ by R. A. Helliwell and T. L. Crystal”] (1975) (2)
The Upper Atmosphere as Seen from Antarctica (1970) (2)
THE STRUCTURE OF THE PLASMASPHERE ON THE BASIS OF INDIRECT MEASUREMENTS (1972) (2)
Power-line radiation. (1980) (2)
On the Measurement of Ionospheric Virtual Height at 100 Kilocycles (1948) (1)
Neil Mather Brice 1934–1974 (1985) (1)
An Interpretation of Lofti–I V.L.F. Observations* *This work was supported by the Naval Research Laboratory under Contract Nonr 3267 (00) (X). (1964) (1)
NON-THERMAL NOISE MEASUREMENTS NEAR PLANETS (1963) (1)
GENERATION OF VLF RADIO NOISE IN THE IONOSPHERE BY ENERGETIC PARTICLE STREAMS (1965) (1)
Active experiments from ground. [of magnetospheric and ionospheric phenomena] (1985) (1)
Coherent wave induced particle precipitation into the upper atmosphere. [due to energetic electrons interacting with VLF waves in magnetosphere (1977) (1)
Stimulation of ULF (Ultra-Low-Frequencies) Geomagnetic Pulsations by Controlled VLF (Very-Low-Frequencies) Transmissions into the Magnetosphere (1977) (1)
6. Whistler-Mode Propagation (1960) (1)
Summary of Resaerch on Whistlers and Related Phenomena (1960) (1)
Correction to “Variable frequency VLF signals in the magnetosphere: Associated phenomena and plasma diagnostics” (1985) (1)
WHISTLERS CHANGE VLF SIGNAL AMPLITUDES. (1971) (0)
The International Geophysical Month (1961) (0)
Daytime whistler-mode attenuation through the lower ionosphere at 15.5 kc as measured on explorer vi during launch trajectory (1965) (0)
Deducing the structure of plasma density irregularities using signals from the Siple Station very-low-frequency transmitter (1988) (0)
Controlled Wave‐Particle Interaction Experiments (2013) (0)
Neil Mather Brice 1934-1974 (1990) (0)
Recent research on magnetospheric wave-particle interactions (1985) (0)
1989 Fleming medal presented to Donald A. Gurnett; citation & reply (1989) (0)
Controlled artificial generation of ultra-low-frequency hydromagnetic waves in the ionosphere and magnetosphere. Final report January 1975--February 1977 (1978) (0)
Neil Mather Brice 1934-1974 in History of Geophysics. Reproduction d'articles parus dans Terrestrial Magnetism and Atmospheric Electricity EOS, Journal of Geophysical Research et Geophysical Research Letters de 1904 à 1988. (1990) (0)
じきけん/サイプル局信号による波動-粒子相互作用の実験 (1980) (0)
Search for whistler-ducts during an ionospheric heating experiment at Boulder, Colorado. Technical report (1974) (0)
Experiments C02 /OGO 2/ and D02 /OGO 4/ Final report, 2 Nov. 1962 - 31 Jul. 1969 (1969) (0)
SPR: The next two years (1986) (0)
Lightning Whistler Observed by the WFC on board the Arase Satellite in the Earth’s Plasmasphere (2018) (0)
A tale of two magnetospheres — the cold and the hot (2001) (0)
Conjugacy in VLF Emissions (1967) (0)
ENGINEERING SURVEY OF U.S. NAVAL RADIO STATION (T) LUALUALEI, OAHU, T.H. (1953) (0)
Whistler and other VLF phenomena associated with the high-altitude nuclear explosion on 9 July 1962 (1962) (0)
VLF STUDIES OF THE MAGNETOSPHERE. (1970) (0)
Radio Wave Propagation and the Ionosphere. Ya. L. Al'pert. Translated from the Russian. Consultants Bureau, New York, 1963. x + 394 pp. Illus. $22.50 (1963) (0)
Measurements of VLF polarization and wave normal direction on OGO-F (1973) (0)
Modification of the propagation characteristics of the ionosphere (and the magnetosphere) by injection into the magnetosphere of whistler-mode waves (1977) (0)
0 CONTROLLED ARTIFICIAL GENERATION OF r ~ ULTRA-LOW . . FREQUENCY IIYDROMAGNETIC WAVES IN THE IONOSPHERE AND MAGNETOSPHERE 0 c (0)
Whistlers and Very Low Frequency Emissions (2013) (0)
Whistler mode wave intensities in the radiation belts (2008) (0)
Some Legacies from the IGY to the IHY (2002) (0)
The Upper Atmosphere (1958) (0)
Experiments A17 /OGO 1/ and B17 /OGO 3/ Final report, 16 Feb. 1962 - 30 Jun. 1968 (1968) (0)
Interview of Robert A. Helliwell by Brian Shoemaker (2008) (0)
A Discussion on the early days of ionospheric research and the theory of electric and magnetic waves in the ionosphere and magnetosphere - Coherent v.l.f. waves in the magnetosphere (1975) (0)

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What Schools Are Affiliated With Robert Helliwell?

Robert Helliwell is affiliated with the following schools:

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