A5000323008- Ionosphere and magnetosphere dynamics
- Earthquake Detection and Analysis
- GNSS positioning and interference
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
National Space Science Center
2024
Chinese Academy of Sciences
2024
Peking University
2018-2024
Abstract In situ electron density measurements by the CHAllenging Minisatellite Payload and Defense Meteorological Satellites Program F17 satellites show that midlatitude ionization at altitudes of ∼350 850 km is enhanced in late evening. The enhancements increase to maximum around midnight are clearly observed till early morning as equatorial decays minimal level. They appear winter hemisphere during June December solstices both hemispheres equinox. well confined between ±30° ±50° magnetic...
Abstract The characteristics of winter nighttime enhancement (WNE) the midlatitude ionosphere at 300, 550, and 750 km altitude are presented, based on radio occultation data from Constellation Observing System for Meteorology, Ionosphere, Climate. WNE has earlier start time larger increasing rate than that 550 km, possibly due to downward plasma diffusion above dominates most upper part ionosphere. Theoretical calculation transport 300 reveals largest effect 45° geomagnetic latitude,...
Abstract We revisited a typical interplanetary (IP) shock event on 7 November 2004, with high time resolution (1 s) total electron content (TEC) observations. The IP impinged the dayside magnetopause at ∼18:27 UT, and launched pulse into magnetosphere. Using multi‐spacecraft timing method, was estimated to propagate an angular velocity of ∼0.1 MLT/s. While in situ spacecraft observations only provided first‐order estimation propagation speed, more precise monitoring propagating achieved by...
Ionospheric topside O+ diffusive flux is derived using Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) radio occultation data, to investigate its global distribution also role in winter nighttime enhancement (WNE) of electron density. The the hemisphere maintains downward throughout night. It much larger between 30o 50o geomagnetic latitudes keeps increasing until 22:00-00:00 LT. peaks at 60oW 60oE-120oE geographic longitudes during December solstice, 180oE...
Abstract Ionospheric plasma density data from the Planar Langmuir Probe onboard CHAllenging Minisatellite Payload (CHAMP) are used to investigate latitudinal profile of ionospheric density. Along with well‐known profiles features equatorial ionization anomaly and bubbles, a third type is observed as smooth large‐scale deep trough (DET) where extremely low. A global survey focusing on magnetically quiet conditions reveals that DET generally post‐sunset phenomenon, their appearance depends...
Abstract The latitudinal location of the Equatorial Ionization Anomaly (EIA) crest has seasonal variation, and there are disagreements on interpretation such characteristic in previous studies. Some studies suggested that this is determined by equatorial electric field. Others changes thermospheric wind. current paper uses Total Electron Content (TEC) data Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) to analyze variation northern EIA eastern Asian sector under...
Ionospheric topside O+ diffusive flux is derived using Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) radio occultation data, to investigate its global distribution also role in winter nighttime enhancement (WNE) of electron density. The the hemisphere maintains downward throughout night. It much larger between 30o 50o geomagnetic latitudes keeps increasing until 22:00-00:00 LT. peaks at 60oW 60oE-120oE geographic longitudes during December solstice, 180oE...
Abstract Ionospheric topside diffusive flux is derived using Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) radio occultation data, to investigate its global distribution also role in winter nighttime enhancement (WNE) of electron density. The the hemisphere maintains downward throughout night. It much larger between geomagnetic latitudes keeps increasing until 22:00–00:00 LT. peaks at W E–E geographic longitudes during December solstice, E June solstice....
An interplanetary shock impinged on the Earth’s magnetosphere 17 March 2015, and caused instant change of total electron content (TEC) measured by ground-based global positioning system (GPS) receivers. Hao et al. (2017) attributed sudden TEC variation to magnetospheric compression shock, in this paper we follow examine process incorporating high time-resolution (1 s) data from some GPS receivers as well measurements BeiDou Navigation Satellite System. These observations add new...
<p indent=0mm>Interplanetary shocks can cause violent disturbances in near-earth space. In this paper, we use high time-resolution <sc>(1 s)</sc> data from ground-based global position system (GPS) receivers to analyze the perturbations of ionosphere total electron content (TEC) when an interplanetary shock impacted Earth's magnetosphere on March 17, 2015. We found that after arrived at Earth, TEC demonstrated characteristics ULF waves, and fluctuation were different latitude regions. The...
&lt;p&gt;We revisit the typical interplanetary shock event on November 7, 2004, with high resolution total electron content (TEC) measurements obtained by distributed Global Navigation Satellite System (GNSS) receivers. TEC impulses were observed after IP impinged dayside agnetosphere at ~18:27 UT. In view of similarity wave form and time-delay characteristics, regarded as responses to shock, despite small amplitude (in order 0.4 TECU). Particularly, peak impulse was first receivers...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Physics. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Extremely low equatorial ionospheric density measured CHAMP due strong meridional neutral windAuthorsYaoyuTianiDYongqiangHaoiDQuanhanLiDongheZhangiDZuoXiaoSee all...