Results 41 to 50 of about 2,463,978 (199)

A Simple Method for Correcting Empirical Model Densities During Geomagnetic Storms Using Satellite Orbit Data

Space Weather, 2020
Empirical models of the thermospheric density are routinely used to perform orbit maintenance, satellite collision avoidance, and estimate time and location of re‐entry for spacecraft.
Daniel A. Brandt, Charles D. Bussy‐Virat, Aaron J. Ridley   +2 more
doaj   +1 more source

The Daily Atmospheric Ionospheric Limb Imager (DAILI) CubeSat Experiment

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract The Daily Atmospheric Ionospheric Limb Imager (DAILI) (Daily Atmospheric and Ionospheric Limb Imager) mission utilized a 6U CubeSat, deployed at about 410 km altitude in a 51‐degree orbit, to make simultaneous daytime limb measurements in two colors; at 630 nm to measure the OI (630 nm) redline and at 765 nm to measure the O2 ${\mathrm{O}}_{2}$
James H. Hecht, William Chavez, Andrew B. Christensen, Ian Collett, Geoffrey Crowley, Lynette J. Gelinas, Brian Habing, Brian Hardy, David Hinkley, Garrett Kinum, David Rock, Adam Vore, David Warren, Richard L. Walterscheid, Jeng‐Hwa Yee, Yongliang Zhang   +15 more
wiley   +1 more source

The Impacts of Tropospheric Gravity Wave‐Generated MSTIDs on Skywaves at Mid‐latitude North American Sector Observed and Modeled Using SuperDARN HF Radars

Radio Science, Volume 61, Issue 9, September 2026.
Abstract Trans‐ionospheric high frequency (HF: 3–30 MHz) response to atmospheric gravity waves (GWs) is studied in the middle‐latitude ionosphere in relation to thunderstorm activity. SuperDARN HF radar observations are compared against the model simulations to quantify the impact of GW‐generated medium‐scale traveling ionospheric disturbances (MSTID ...
S. Chakraborty, P. A. Inchin, S. Debchoudhury, B. Bergsson, M. Zettergren, J. M. Ruohoniemi   +5 more
wiley   +1 more source

Validation of Global Ionospheric Specification (GIS) Electron Density Measurements During Solar Minimum to Solar Maximum Under Quiet and Disturbed Geomagnetic Conditions

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Global Ionospheric Specification (GIS) three‐dimensional electron density profiles constructed by assimilating the line‐of‐sight total electron content (TEC) from global navigation satellite system (GNSS) radio occultation (RO) measurements by FORMOSAT‐7/COSMIC‐2 (F7/C2) and ground‐based receiver network from international GNSS service ...
P. K. Rajesh, C. H. Charles Lin, C. Y. Lin, T. Matsuo, H. Jin, S. Perwitasari, M. Nishioka, Chao‐Yen Chen   +7 more
wiley   +1 more source

Thermospheric Density: An Overview of Temporal and Spatial Variations [PDF]

Space Science Reviews, 2011
Neutral density shows complicated temporal and spatial variations driven by external forcing of the thermosphere/ionosphere system, internal dynamics, and thermosphere and ionosphere coupling. Temporal variations include abrupt changes with a time scale of minutes to hours, diurnal variation, multi-day variation, solar-rotational variation, annual ...
Liying Qian, Stanley C. Solomon
openaire   +1 more source

Global Circulation of Martian Ionospheric Currents Revealed by Magnetometer Data

AGU Advances, Volume 7, Issue 6, September 2026.
Abstract In the dynamo region of the Martian ionosphere, a large‐scale current is generated by charge separation: ions collide with neutrals while electrons preferentially gyrate around local magnetic field lines. Using MAVEN magnetometer data and a physics‐informed neural network constrained by Ampère's law and Gauss's law for magnetism (the Neural ...
T. Delcourt, A. Mittelholz
wiley   +1 more source

Climatology of globally averaged thermospheric mass density [PDF]

Journal of Geophysical Research: Space Physics, 2010
We present a climatological analysis of daily globally averaged density data, derived from orbit data and covering the years 1967–2007, along with an empirical Global Average Mass Density Model (GAMDM) that encapsulates the 1986–2007 data. The model represents density as a function of the F10.7 solar radio flux index, the day of year, and the Kp ...
J. T. Emmert, J. M. Picone
openaire   +1 more source

Quantifying uncertainty in thermospheric mass density from satellite measurements via data assimilation with CTIPe model

, 2023
This study proposes a method for estimating the uncertainty of thermospheric mass density derived from satellites, which is a crucial parameter that characterizes the upper atmosphere.
Borries, Claudia, Codrescu, Stefan, Kodikara, Timothy, Fernandez-Gomez, Isabel, Heymann, Frank   +4 more
core  

Seasonal Transitions in the Thermosphere Inferred from Ionospheric Observations

Remote Sensing, 2023
Ionospheric observations along with CHAMP/STAR neutral gas density measurements were used to retrieve thermospheric parameters and to check whether the equinox transition season exists separately from the December solstice and June solstice seasons ...
Loredana Perrone, Andrey V. Mikhailov
doaj   +1 more source

First Observational Results of the Neutral Gas Mass Spectrometer Onboard the China's TianMu‐1 Constellation

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract In situ observations of thermospheric composition have long been scarce, limiting our understanding of the upper atmosphere and its response to space weather. This study focuses on the Neutral Gas Mass Spectrometer (NGMS) onboard the TM19 and TM20 satellites of China's TianMu‐1 constellation, presenting the first systematic elaboration of its ...
Jiangzhao Ai, Yongping Li, Xianguo Zhang, Yueqiang Sun, Hong Zeng, Weihua Bai, Hongbo Wang, Xiaoliang Zheng, Jia Li, Yujie Wang, Yuanyuan Cao, Xinchun Tang   +11 more
wiley   +1 more source