Results 61 to 70 of about 5,641 (197)

A Bayesian Approach to F‐Region Mesoscale Flow Estimation With EISCAT_3D

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract The ionospheric electric field is a key parameter for understanding ionospheric electrodynamics and the magnetosphere–ionosphere coupling. Several methods have been developed to reconstruct the two‐dimensional distribution of the ionospheric electric field from line‐of‐sight (LOS) ion velocities observed by incoherent scatter radars ...
Mizuki Fukizawa, Yasunobu Ogawa, Koji Nishimura, Genta Ueno, Takanori Nishiyama, Taishi Hashimoto, Takuo T. Tsuda   +6 more
wiley   +1 more source

New IGRF computer program

Eos, Transactions American Geophysical Union, 1969
A Fortran II Computer program has been developed by the U.S. Coast and Geodetic Survey to compute the International Geomagnetic Reference Field (IGRF) for any geographic position. To facilitate the portrayal and comparison of magnetic anomalies, the IGRF is used as a common datum for removal of regional gradients from magnetic survey measurements. This
openaire   +1 more source

Should IGRF data be commercialized?

Eos, Transactions American Geophysical Union, 1990
At the 1989 International Association of Geomagnetism and Aeronomy meeting in Exeter, U.K., a proposal was presented to support geomagnetic observatories in the Third World by charging commercial users of the International Geomagnetic Reference Field a price for its use. The proposal guarantees research scientists free access to IGRF.
openaire   +1 more source

Evidence for a Localized Burst of Relativistic Electrons Produced in Earth's Plasma Sheet During a Substorm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Earth's magnetotail and its plasma sheet are highly dynamic, influenced by both the solar wind and the inner magnetosphere. Periodically, energy is explosively released in the magnetotail during substorms. However, the extent to which electrons are accelerated in the magnetotail remains an open question, with recent observations revealing ...
M. Shumko, D. L. Turner, A. Y. Ukhorskiy, I. J. Cohen, G. K. Stephens, A. Artemyev, X. Zhang, C. Wilkins, E. Tsai, C. Gabrielse, S. Raptis, M. Sitnov, V. Angelopoulos   +12 more
wiley   +1 more source

The problem with IGRF commercialization

Eos, Transactions American Geophysical Union, 1991
I wish to comment on the news item, “Geomagnetic Reference Field: To License or Not to License?,” by Stuart and others, which appeared in the February 19 issue of Eos. It is important to recall some of the history of establishing an International Geomagnetic Reference Field (IGRF) and the conditions that prevailed before the field was standardized ...
openaire   +1 more source

Evidence from Strandings for Geomagnetic Sensitivity in Cetaceans [PDF]

, 1986
We tested the hypothesis that cetaceans use weak anomalies in the geomagnetic field as cues for orientation, navigation and/or piloting. Using the positions of 212 stranding events of live animals in the Smith sonian compilation which fall within the ...
Dizon, Andrew E., Kirschvink, Joseph L., Westphal, James A.   +2 more
core  

Imaging ionospheric inhomogeneities using spaceborne synthetic aperture radar [PDF]

, 2011
We present a technique and results of 2-D imaging of Faraday rotation and total electron content using spaceborne L band polarimetric synthetic aperture radar (PolSAR).
Chapman, B., Freeman, A., Li, Z., Pi, X., Rosen, P.   +4 more
core   +2 more sources

A New Orthogonal Geomagnetic Coordinate System: The Generalized Eccentric Dipole

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The study of near‐Earth plasma environment relies heavily on accurate geomagnetic coordinate systems, mainly because the plasma motion is controlled by the E×B $\boldsymbol{E}\times \boldsymbol{B}$ drift and thus is constrained by the structure of the magnetic field.
Antoine Resseguier, Pierre‐Louis Blelly, Aurélie Marchaudon   +2 more
wiley   +1 more source

Another view on IGRF commercialization

Eos, Transactions American Geophysical Union, 1991
The purpose of this article is to add to Patrick Taylor's arguments against commercialization of the International Geomagnetic Reference Field (IGRF) (Eos, April 16, 1991), and to examine the long‐term future of the global network of magnetic observatories.
openaire   +1 more source

Modeling Study on Energetic Particle Distribution in the Ionospheric South Atlantic Anomaly at Height of the Space Station

Space Weather, Volume 24, Issue 4, April 2026.
Abstract The South Atlantic Anomaly (SAA) in Earth's radiation belt is a critical region that poses significant threats to the safety of Space Stations. This region harbors a high concentration of energetic particles that can penetrate Space Stations, thereby affecting onboard components and posing risks to astronauts.
Xiang Dong, Tao Yang, Mingchen Sun, Haimeng Li, Qinglin Zhu, Yifan Zhang   +5 more
wiley   +1 more source