K. Tsuruda, S. Machida, T. Terasawa, A. Nishida, K. Maezawa,
... geomagnetic meridian passing about 100 km west of Roberval, Quebec, during about 1 month from July 10 to ...
Tópico(s): GNSS positioning and interference
1982 - American Geophysical Union | Journal of Geophysical Research Atmospheres
J. H. Doolittle, D. L. Carpenter,
... with VLF waves at the conjugate location, near Roberval, Quebec. Since most whistlers recorded at Siple or Roberval originate in the north, Roberval affords a clear ...
Tópico(s): Geomagnetism and Paleomagnetism Studies
1983 - American Geophysical Union | Geophysical Research Letters
... Antarctica, VLF transmitter to the conjugate station at Roberval, Quebec, Canada (L∼4.2), are generally multipath in nature. From previously reported initial observations at Roberval with a tracking receiver/direction finder (TR/DF) ...
Tópico(s): Seismic Waves and Analysis
1980 - American Geophysical Union | Journal of Geophysical Research Atmospheres
J. L. Roeder, J. R. Benbrook, E. A. Bering, W. R. Sheldon,
... at both Siple and its magnetic conjugate point, Roberval, Quebec. Detailed one‐to‐one correspondence between the microbursts and the chorus was not a consistent feature of the data. Time series analysis of the data did indicate a significant correlation between the Siple X ray precipitation and the Roberval VLF waves with an arrival time delay of ...
Tópico(s): Geomagnetism and Paleomagnetism Studies
1985 - American Geophysical Union | Journal of Geophysical Research Atmospheres
E. A. Bering, T. J. Rosenberg, J. R. Benbrook, D. L. Detrick, D. L. Matthews, M.J. Rycroft, Mark A. Saunders, W. R. Sheldon,
... an X ray scintillation counter was launched from Roberval, Quebec, Canada (L =4.1) at 0828 UT (0328 LT) on July 9, 1975. A magnetospheric substorm was observed locally between 0815 and 1100 UT, which produced a maximum ΔB of ∼500 nT at ∼0930 UT. A single‐cell atmospheric thunderstorm developed northeast of Roberval beginning around 0925 UT which was most intense ...
Tópico(s): Earthquake Detection and Analysis
1980 - American Geophysical Union | Journal of Geophysical Research Atmospheres
R. A. Helliwell, J. P. Katsufrakis, T. F. Bell, R. Raghuram,
... these signals as received at the conjugate point, Roberval, Quebec, showed changes in slope, entrainments, and cutoffs at frequencies (several kilohertz) close to the harmonic induction lines from the local 60-Hz power system. This observation led to the suggestion that harmonic radiation from the power system enters the magnetosphere and interacts with the triggered emissions. New evidence supporting this suggestion has been found in spectrograms of simultaneous recordings made at Roberval and at Siple Station in Antarctica. It is ...
Tópico(s): Seismic Waves and Analysis
1975 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... 4) and a receiver at its conjugate station, Roberval, Quebec, Canada. Many important features of power‐line‐induced ...
Tópico(s): Earthquake Detection and Analysis
1978 - American Geophysical Union | Geophysical Research Letters
... delay. New data from Siple Station, Antarctica, and Roberval, Quebec, are introduced suggesting that precursors start at power ...
Tópico(s): Earthquake Detection and Analysis
1977 - American Geophysical Union | Journal of Geophysical Research Atmospheres
R. Raghuram, T. F. Bell, R. A. Helliwell, J. P. Katsufrakis,
... Station are detected at the receiving station in Roberval, Quebec, Canada. Suppression levels as high as 20 dB ...
Tópico(s): Seismic Waves and Analysis
1977 - American Geophysical Union | Journal of Geophysical Research Atmospheres
A. C. Fraser‐Smith, C. A. Cole,
... ULF recordings were made at the conjugate point (Roberval, Quebec). The same 8‐hour transmission schedule was followed ...
Tópico(s): Geophysics and Sensor Technology
1975 - American Geophysical Union | Geophysical Research Letters
R. A. Helliwell, D. L. Carpenter, T. R. Miller,
... triggering, as observed at the conjugate point, near Roberval, Quebec. In a new kind of experiment it has ...
Tópico(s): Seismic Waves and Analysis
1980 - American Geophysical Union | Journal of Geophysical Research Atmospheres
J. C. Siren, T. J. Rosenberg, D. L. Detrick, L. J. Lanzerotti,
... phase by a balloon‐borne scintillation counter over Roberval, Quebec, Canada. The microburst groups were accompanied one‐to‐ ...
Tópico(s): Seismic Waves and Analysis
1980 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... been used at Siple Station (and its conjugate, Roberval, Quebec) to study nonlinear mechanisms of wave growth and ...
Tópico(s): Geomagnetism and Paleomagnetism Studies
1979 - Springer Nature (Netherlands) | Astrophysics and space science library
... made at Siple, Antarctica (L = 4.1, conjugate—Roberval, Quebec), although there are some interesting differences. Line radiation ...
Tópico(s): Lightning and Electromagnetic Phenomena
1981 - Elsevier BV | Planetary and Space Science
R. L. Arnoldy, Richard L. Kaufmann, L. J. Cahill, S. B. Mende Lockheed,
... measured to be at the conjugate point over Roberval, Quebec. Although one can fit the observations to a ...
Tópico(s): Geomagnetism and Paleomagnetism Studies
1983 - American Geophysical Union | Geophysical Research Letters
L. J. Cahill, M. Sugiura, N. Lin, R. L. Arnoldy, S. D. Shawhan, M. J. Engebretson, B. G. Ledley,
... at the ground magnetic observatories Siple, Antarctica, and Roberval, Quebec, 15° to 30° west of DE‐1 and ...
Tópico(s): Solar and Space Plasma Dynamics
1984 - American Geophysical Union | Journal of Geophysical Research Atmospheres
E. W. Paschal, R. A. Helliwell,
... transmitter at Siple Station, Antarctica, as received at Roberval, Quebec. Pulses with temporal growth show a relative phase ...
Tópico(s): Earthquake Detection and Analysis
1984 - American Geophysical Union | Journal of Geophysical Research Atmospheres
C. Carlson, R. A. Helliwell, D. L. Carpenter,
... lower cutoffs when received at the conjugate station, Roberval, Quebec. Ramp group delay measurements and ionospheric sounding data ...
Tópico(s): Dust and Plasma Wave Phenomena
1985 - American Geophysical Union | Journal of Geophysical Research Atmospheres
T. J. Rosenberg, Ran Wei, D. L. Detrick, U. S. Inan,
... Siple station and at the conjugate location of Roberval, Quebec during the microburst activity on this day. In ...
Tópico(s): Seismic Waves and Analysis
1990 - American Geophysical Union | Journal of Geophysical Research Atmospheres
M. J. Engebretson, L. J. Cahill, J. D. Winningham, T. J. Rosenberg, R. L. Arnoldy, N. C. Maynard, M. Sugiura, J. H. Doolittle,
... instrumentation at Siple, Antarctica, and its conjugate point, Roberval, Quebec, and low‐altitude particle and magnetic and electric ...
Tópico(s): Solar and Space Plasma Dynamics
1986 - American Geophysical Union | Journal of Geophysical Research Atmospheres
R. A. Helliwell, U. S. Inan, J. P. Katsufrakis, D. L. Carpenter,
... ducted magnetospheric propagation to the conjugate station at Roberval, Quebec. Sidebands up to seventh order were generated extending ...
Tópico(s): Seismic Waves and Analysis
1986 - American Geophysical Union | Journal of Geophysical Research Atmospheres
E. W. Paschal, L. J. Lanzerotti, C. G. Maclennan,
... Siple Station VLF transmitter to a receiver at Roberval, Quebec, are compared to variations in the horizontal components ...
Tópico(s): Geophysics and Sensor Technology
1990 - American Geophysical Union | Journal of Geophysical Research Atmospheres
William B. Gail, D. L. Carpenter,
... Byrd, Eights, and Palmer Stations in Antarctica and Roberval in Quebec, Canada, has since identified many more events. The ...
Tópico(s): Seismic Waves and Analysis
1984 - American Geophysical Union | Journal of Geophysical Research Atmospheres
... of the chevron‐structured events were made at Roberval, Quebec (L ˜ 4; geomagnetic latitude 60°). They appear to ...
Tópico(s): Earthquake Detection and Analysis
1977 - American Geophysical Union | Geophysical Research Letters
A. C. Fraser‐Smith, R. A. Helliwell,
... Pc 1 pulsations and VLF activity occurring at Roberval, Quebec, during 9 intervals of simultaneous Pc 1 pulsation ...
Tópico(s): Seismic Waves and Analysis
1980 - American Geophysical Union | Geophysical Research Letters
En 2005, la decouverte du plus ancien etablissement europeen au nord du Mexique, le fort erige par Jacques Cartier et Jean-Francois de la Rocque de Roberval en 1541, a pose plusieurs defis aux archeologues de la Ccnq. En effet, ce site archeologique recele une culture materielle tres peu connue des chercheurs specialises sur la periode dite « euro-americaine », car aucune collection d’artefacts d’origine francaise datant de la premiere moitie du xvie n’avait ete mise au jour en Amerique jusqu...
Tópico(s): Indigenous Studies and Ecology
2010 - | Archeopages
... made at Siple, Antarctica (L = 4.1, conjugate—Roberval, Quebec), although there are some interesting differences. Line radiation ...
Tópico(s): Geomagnetism and Paleomagnetism Studies
1980 - National Institute of Polar Research | Memoirs of National Institute of Polar Research. Special issue
... Régis Couture Départment de santé communautaire140 Avenue Lizotte Roberval, Québec Canada G8H 1B9 Search for other works by ...
Tópico(s): Advanced Causal Inference Techniques
1982 - Oxford University Press | American Journal of Epidemiology
... à l'identification des céramiques retrouvées à Cartier-Roberval (Québec).
Tópico(s): Archaeology and ancient environmental studies
2010 - | Archeopages