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Found 5 entries in the Bibliography.
Showing entries from 1 through 5
Geomagnetic storm-induced plasma density enhancements in the southern polar ionospheric region: A comparative study using St. Patrick s Day storms of 2013 and 2015
order to examine if the variations in the TEC were caused by thermospheric composition changes in the southern high-latitude regions, we present O/N 2 maps obtained from the GUVI
Shreedevi, PR; Choudhary, RK; Thampi, Smitha; Yadav, Sneha; Pant, TK; Yu, Yiqun; McGranaghan, Ryan; Thomas, Evan; Bhardwaj, Anil; Sinha, AK;
Published by: Space Weather Published on:
YEAR: 2020   DOI: 10.1029/2019SW002383
Morphological study on the ionospheric variability at Bharati, a polar cusp station in the southern hemisphere
Morphological features of the quiet/disturbed time variations in the Total Electron Content (TEC) at the polar cusp station Bharati (76.69\textdegreeS MLAT) during a period of 5 years starting from February 2013 to December 2017 has been studied using GPS TEC measurements. The TEC at Bharati follows a diurnal pattern with its peak appearing close to local noon/magnetic noon during the summer/winter months. A nighttime enhancement in the TEC is seen around the magnetic midnight during winter. The plasma density at Bharati ...
Shreedevi, P.R.; Choudhary, R.K.; Yu, Yiqun; Thomas, Evan;
Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: 10/2019
YEAR: 2019   DOI: 10.1016/j.jastp.2019.105058
Evaluation of Space Traffic Effects in SBUV Polar Mesospheric Cloud Data
Water-rich rocket exhaust plumes, in particular those emitted by the National Aeronautics and Space Administration Space Shuttle, have been suggested to make a significant contribution to long-term trends in polar mesospheric cloud (PMC) ice water content. We investigate this claim using the combined Solar Backscatter Ultraviolet (SBUV) PMC data record from eight separate instruments, which includes 60 Shuttle launches during PMC seasons between 1985 and 2011. No statistically significant postlaunch signal in PMC total ic ...
DeLand, Matthew; Thomas, Gary;
Published by: Journal of Geophysical Research: Atmospheres Published on: 03/2019
YEAR: 2019   DOI: 10.1029/2018JD029756
Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars
The Super Dual Auroral Radar Network (SuperDARN) is a network of high-frequency (HF) radars located in the high- and mid-latitude regions of both hemispheres that is operated under international cooperation. The network was originally designed for monitoring the dynamics of the ionosphere and upper atmosphere in the high-latitude regions. However, over the last approximately 15 years, SuperDARN has expanded into the mid-latitude regions. With radar coverage that now extends continuously from auroral to sub-auroral and mid- ...
Nishitani, Nozomu; Ruohoniemi, John; Lester, Mark; Baker, Joseph; Koustov, Alexandre; Shepherd, Simon; Chisham, Gareth; Hori, Tomoaki; Thomas, Evan; Makarevich, Roman; , others;
Published by: Progress in Earth and Planetary Science Published on:
YEAR: 2019   DOI: 10.1186/s40645-019-0270-5
GPS phase scintillation at high latitudes during two geomagnetic storms
Prikryl, Paul; Ghoddousi-Fard, Reza; Ruohoniemi, John; Thomas, Evan; Zhang, Y; Paxton, LJ;
Published by: Auroral dynamics and space weather Published on: