Zobrazeno 1 - 10
of 204
pro vyhledávání: '"Jan Josef Sojka"'
Autor:
Jan Josef Sojka, David Alan Smith
Publikováno v:
All Physics Faculty Publications
The open‐closed boundary (OCB) defines a region of significant transformation in Earth's protective magnetic shield. Principle among these changes is the transition of magnetic field lines from having two foot points, one in each hemisphere, to one
Publikováno v:
All Physics Faculty Presentations
Much theoretical and observational work has been devoted to studying the occurrence of F region polar cap patches in the Northern Hemisphere; considerably less work has been applied to the Southern Hemisphere. In recent years, the Madrigal database o
Autor:
Robert A. Marshall, Jan Josef Sojka, Douglas P. Drob, Esa Turunen, Antti Kero, Don Rice, Wei Xu
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 57:7613-7622
In this paper, we report measurements in Colorado and Utah of the disturbed very-low-frequency (VLF) signals from the NML Navy transmitter in North Dakota during the 2017 solar eclipse. Using an occultation mask of solar fluxes together with detailed
Autor:
Anthony J. Mannucci, Robert W. Schunk, Larry Gardner, Attila Komjathy, Lie Zhu, Ludger Scherliess, Jan Josef Sojka, V. Eccles, Gary Rosen, Xiaoqing Pi, Chao Wang
Publikováno v:
Space Weather. 19
Autor:
Jan Josef Sojka, D. Rice, V. Eccles, Robert F. Benson, H. G. James, Robert W. Schunk, Michael David
Publikováno v:
Radio Science. 53:906-920
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 164:10-17
A new field-aligned current system in the high-latitude ionosphere, the terminator field-aligned currents, was recently discovered by Zhu et al. (2014). A series of modeling, observational, and theoretical studies need to be performed in order to get
Autor:
Jan Josef Sojka
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 220:105667
The externally imposed vertical drift in the F-region is an extremely important driver of ionospheric dynamics but is very difficult to measure or map. Ionospheric servo algorithms have used hmF2 as F-region observable to infer the vertical drift. Ho
Autor:
Jan Josef Sojka
Publikováno v:
Space Science Reviews. 212:1041-1067
In this review we consider aspects of space weather that can have a severe impact on the terrestrial atmosphere. We begin by identifying the pre-conditioning role of the Sun on the temperature and density of the upper atmosphere. This effect we defin
Autor:
Jan Josef Sojka, Attila Komjathy, Gary Rosen, Xiaoqing Pi, Brian Wilson, V. Eccles, Mark D. Butala, Chao Wang, Ludger Scherliess, Anthony J. Mannucci, Robert W. Schunk, Larry Gardner, Lie Zhu
Publikováno v:
Radio Science. 51:1157-1165
The goal of the MEPS program is to improve space weather specification and forecasting with ensemble modeling. Space weather can have detrimental effects on a variety of civilian and military systems and operations, and many of the applications perta
Publikováno v:
Geophysical Research Letters. 43:2422-2428