Motions of the equatorial ionization anomaly crests imaged by FORMOSAT‐3/COSMIC

Lin, Charles; Liu, J. Y.; Fang, Tzu‐Wei; Chang, Po Ya; Tsai, Heng; Chen, C. H.; Hsiao, Chao-Chih

doi:10.1029/2007gl030741

Cited by 175 publications

(191 citation statements)

References 40 publications

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“…It is also seen that the crest in the summer hemisphere is stronger than that in the winter hemisphere. This corroborates with the previous observations that during afternoon hours, the summer EIA crest intensifies and the winter crest start to diminish (Lin et al, 2007). This interhemispheric asymmetry of EIA has been studied previously using model simulations (Balan and Bailey, 1995).…”

Section: Supim Simulationssupporting

confidence: 80%

Mid-latitude Summer Nighttime Anomaly (MSNA) – observations and model simulations

et al. 2011

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Abstract. In this paper, we present model simulations of the Mid-latitude Summer Nighttime Anomaly (MSNA) in the Northern Hemisphere, which is characterized by noontime dip and evening maximum in the diurnal variation of the ionospheric density. The simulations are carried out using SUPIM (Sheffield University Plasmasphere Ionosphere Model) for solar minimum at 135 • E longitude where MSNA is most pronounced in the Northern Hemisphere. The simulations are used to understand the relative importance of electric fields, and zonal and meridional winds in the formation of MSNA. The wind velocities measured by the Middle and Upper atmosphere radar (MU radar) and those obtained from the horizontal wind model (HWM93) are used. The results show that the formation of MSNA is closely related to the diurnal variation of the neutral winds with little contribution from the changes in the electric fields. The observed features of MSNA are better reproduced when MU radar winds are used as model input rather than HWM winds.

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Section: Supim Simulationssupporting

confidence: 80%

Mid-latitude Summer Nighttime Anomaly (MSNA) – observations and model simulations

et al. 2011

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“…Here, the large electron densities in the southern latitudes have started to disappear. The maximum density associated with the EIA is found at 1400-1500 LT, which agrees with previous observations (e.g., Lin et al, 2007). The reconstruction corresponding to the next satellite pass at 1217 UT (2117 LT) shows that the northern side has en- Fig.…”

Section: Resultssupporting

confidence: 81%

First results from the ionospheric tomography experiment using beacon TEC data obtained by means of a network along a longitude of 136°E over Japan

Thampi

Yamamoto

2010

Earth Planet Sp

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A chain of newly designed GNU (GNU is not UNIX) Radio Beacon Receivers (GRBR) has recently been established over Japan, primarily for tomographic imaging of the ionosphere over this region. Receivers installed at Shionomisaki (33.45 • N, 135.8• E), Shigaraki (34.8 • N, 136.1 • E), and Fukui (36 • N, 136• E) continuously track low earth orbiting satellites (LEOS), mainly OSCAR, Cosmos, and FORMOSAT-3/COSMIC, to obtain simultaneous total electron content (TEC) data from these three locations, which are then used for the tomographic reconstruction of ionospheric electron densities. This is the first GRBR network established for TEC observations, and the first beacon-based tomographic imaging in Japanese longitudes. The first tomographic images revealed the temporal evolution with all of the major features in the ionospheric electron density distribution over Japan. A comparison of the tomographically reconstructed electron densities with the f o F 2 data from Kokubunji (35 • N, 139• E) revealed that there was good agreement between the datasets. These first results show the potential of GRBR and its network for making continuous, unattended ionospheric TEC measurements and for tomographic imaging of the ionosphere.

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“…Immel et al (2006) suggest that the phenomenon is caused by ionospheric interactions with weather in the tropics. This kind of phenomenon, its diurnal and seasonal variation, and its height dependence can be studied in great detail with COSMIC data (Lin et al, 2007a(Lin et al, ,b, 2010. Pedatella et al (2009) used a combination of groundbased Global Positioning System (GPS) total electron content (TEC), TOPEX (ocean Topography Experiment) and Jason-1 TEC, and topside ionosphere/plasmasphere TEC, GPS radio occultation, and tiny ionospheric photometer (TIP) observations from COSMIC to study an ionospheric storm of long duration that occurred on 15 December 2006.…”

Section: Ionospheric Research and Space Weathermentioning

confidence: 99%

Exploring Earth's atmosphere with radio occultation: contributions to weather, climate and space weather

2011

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Abstract. The launch of the proof-of-concept mission GPS/MET (Global Positioning System/Meteorology) in 1995 began a revolution in profiling Earth's atmosphere through radio occultation (RO). GPS/MET; subsequent single-satellite missions CHAMP (CHAllenging Minisatellite Payload), SAC-C (Satellite de Aplicaciones Cientificas-C), GRACE (Gravity Recovery and Climate Experiment), METOP-A, and TerraSAR-X (Beyerle et al., 2010); and the six-satellite constellation, FORMOSAT-3/COSMIC (Formosa Satellite mission #3/Constellation Observing System for Meteorology, Ionosphere, and Climate) have proven the theoretical capabilities of RO to provide accurate and precise profiles of electron density in the ionosphere and refractivity, containing information on temperature and water vapor, in the stratosphere and troposphere. This paper summarizes results from these RO missions and the applications of RO observations to atmospheric research and operational weather analysis and prediction.

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Motions of the equatorial ionization anomaly crests imaged by FORMOSAT‐3/COSMIC

Cited by 175 publications

References 40 publications

Mid-latitude Summer Nighttime Anomaly (MSNA) – observations and model simulations

Mid-latitude Summer Nighttime Anomaly (MSNA) – observations and model simulations

First results from the ionospheric tomography experiment using beacon TEC data obtained by means of a network along a longitude of 136°E over Japan

Exploring Earth's atmosphere with radio occultation: contributions to weather, climate and space weather

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