Zobrazeno 1 - 10
of 113
pro vyhledávání: '"David J. Knudsen"'
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-1 (2024)
Externí odkaz:
https://doaj.org/article/410ed68ad33c42c8a711c50cd7056a8f
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-39 (2022)
Abstract We assess the performance of the thermal ion imaging (TII) technique as conceived for the Swarm Earth Explorer satellites. Analysis, simulation, and laboratory testing performed prior to flight provided estimates of systematic and random err
Externí odkaz:
https://doaj.org/article/5a9c41733d0d47468dfa096b65e5c939
Autor:
Daniel D Billett, Kathryn A McWilliams, Pavlo V. Ponomarenko, Carley Jade Martin, David J. Knudsen, Sarah Kimberly Vines
We present three events where high-resolution electric and magnetic field measurements from the Swarm satellite constellation coincided with excellent F-region ionospheric coverage from SuperDARN. Large-scale ionospheric convection patterns from Supe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32773376ea380829ad7e51582a884ffb
https://doi.org/10.22541/essoar.167979633.38483690/v1
https://doi.org/10.22541/essoar.167979633.38483690/v1
Publikováno v:
Perspectives of Earth and Space Scientists. 4
Publikováno v:
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
The height-integrated ionospheric Pedersen conductance is a crucial parameter in estimating ionospheric Joule heating, which in turn has a large impact on the thermospheric chemical composition and circulation during periods of increased geomagnetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4b3a842504214265436e1b62c91d6ea
Publikováno v:
Journal of Geophysical Research: Space Physics. 127
Variations in ionospheric electron density, so-called irregularities, produce rapid fluctuations on propagating communication and navigation signals, which can be severe near the magnetic equator and in the polar regions. This may result in positioni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e61484516eaa0ada7c91cfeb431e23d
https://doi.org/10.5194/egusphere-egu22-10326
https://doi.org/10.5194/egusphere-egu22-10326
Publikováno v:
Earth and Space Science, Vol 8, Iss 11, Pp n/a-n/a (2021)
Ion temperature is one of the key parameters that provides insight into the thermal balance of the coupled ionosphere‐thermosphere system. Together with the temperatures of neutral and electron gases, it affects physical and chemical processes and
Autor:
Kathryn A. McWilliams, R. Ghaffari, J. K. Burchill, Joran Moen, D. R. Huyghebaert, C. Feltman, Andres Spicher, David J. Knudsen, S. Henderson, L. Olifer, Allison Jaynes, J. Wu
Publikováno v:
Earth and Space Science, Vol 8, Iss 7, Pp n/a-n/a (2021)
The locations of region 1 and 2 field‐aligned current systems were determined using fluxgate magnetometer measurements from 875 dawn‐dusk passes of the Swarm A satellite. Within each field‐aligned current region, the ionospheric Pedersen conduc