Zobrazeno 1 - 10
of 30
pro vyhledávání: '"J. Viérin"'
Autor:
J. Vierinen, F. L. Poblet, J. L. Chau, V. Avsarkisov, H. L. Pécseli, M. Tsutsumi, S. Nozawa, M. G. Johnsen, R. Latteck, N. Gulbrandsen
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 11, Pp n/a-n/a (2024)
Abstract Stratified turbulence (ST) has been proposed as a model for the dynamics of the mesosphere‐lower thermosphere (MLT) region. This theory postulates that for horizontal mesoscales (∼1–400 km), the kinetic energy of horizontal winds dissi
Externí odkaz:
https://doaj.org/article/e8fd95c1ce544e308f9f4763b10c6a2a
Publikováno v:
Annales Geophysicae, Vol 41, Pp 55-67 (2023)
Volumetric measurements of the ionosphere are important for investigating spatial variations of ionospheric features, like auroral arcs and energy deposition in the ionosphere. In addition, such measurements make it possible to distinguish between va
Externí odkaz:
https://doaj.org/article/a98dd12780cc4c70b5a53dd75b2b54f5
Publikováno v:
Annales Geophysicae, Vol 40, Pp 519-530 (2022)
Earth's lower ionosphere is the region where terrestrial weather and space weather come together. Here, between 60 and 100 km altitude, solar radiation governs the diurnal cycle of the ionized species. This altitude range is also the place where nano
Externí odkaz:
https://doaj.org/article/a5d79323de8f4410adac474434554be1
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 11, Pp 293-306 (2022)
Accurate high-resolution measurements are essential to improve our understanding of environmental processes. Several chemical sensors relying on membrane separation extraction techniques have slow response times due to a dependence on equilibrium par
Externí odkaz:
https://doaj.org/article/6711f908cd5549e58ce986a83bd08dfe
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 11, Pp 25-35 (2022)
Radio wave absorption in the ionosphere is a function of electron density, collision frequency, radio wave polarisation, magnetic field and radio wave frequency. Several studies have used multi-frequency measurements of cosmic radio noise absorption
Externí odkaz:
https://doaj.org/article/c562d4757bbd4343b45fd21e8dbd05de
Publikováno v:
Annales Geophysicae, Vol 39, Pp 961-974 (2021)
Measurements of height-dependent electric field (E) and neutral wind (u) are important governing parameters of the Earth's upper atmosphere, which can be used to study, for example, how auroral currents close or how energy flows between the ionized a
Externí odkaz:
https://doaj.org/article/301bf96ddc7342648992ef9c79bd23eb
Publikováno v:
Annales Geophysicae, Vol 39, Pp 427-438 (2021)
Ground-based inverse synthetic aperture radar is a tool that can provide insights into the early history and formative processes of planetary bodies in the inner solar system. This information is gathered by measuring the scattering matrix of the tar
Externí odkaz:
https://doaj.org/article/c5a4a96323d64db392ce71949e0a0fce
Publikováno v:
Annales Geophysicae, Vol 39, Pp 119-134 (2021)
A new incoherent scatter radar called EISCAT 3D is being constructed in northern Scandinavia. It will have the capability to produce volumetric images of ionospheric plasma parameters using aperture synthesis radar imaging. This study uses the curren
Externí odkaz:
https://doaj.org/article/7f9b99eb24e4460392572606bfcc67f5
Publikováno v:
Annales Geophysicae, Vol 38, Pp 861-879 (2020)
Radar observations can be used to obtain accurate orbital elements for near-Earth objects (NEOs) as a result of the very accurate range and range rate measureables. These observations allow the prediction of NEO orbits further into the future and als
Externí odkaz:
https://doaj.org/article/9a78ac2c3bfd4339900f77451132601f
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 3023-3031 (2020)
We present the first observations from a new low-cost oblique ionosonde located in Antarctica. The transmitter is located at McMurdo Station, Ross Island, and the receiver at Amundsen–Scott Station, South Pole. The system was demonstrated successfu
Externí odkaz:
https://doaj.org/article/6eec248f333a492288cd4240c1afd0ee