Bibliography
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Found 171 entries in the Bibliography.
Showing entries from 151 through 171
| 2008 |
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Ionosphere disturbances observed throughout Southeast Asia of the superstorm of 20--22 November 2003 Ionospheric disturbances in the Southeast Asian region during the super magnetic storm of 20–22 November 2003 were investigated through an ionosonde chain and a GPS network assisted by the space-borne instruments. At early stage of the storm in the postsunset sector, large enhancements in the critical frequency of F2 layer and total electron content were observed at northern crest region of the equatorial ionization anomaly (EIA), which might be produced by both the storm meridional wind superimposed with traveling atmospheric disturbances and prompt penetration electric field (PPE). During the main phase of the storm when interplanetary magnetic field started a 12-h southward turning, equatorial ionosphere was elevated to a very high level which should be most probably caused by a long-duration PPE event. Meanwhile, at mid-low latitudes, ionosphere witnessed an initial simultaneous decrease then followed by drastic increases, which is very different from the past observations in this region (Reddy and Nishida, 1992). Combined analysis of the data from the ionosonde and other space-based measurement shows that for the present case the penetration efficiency of the interplanetary electric field (IEF) to the equatorial ionosphere was larger at night than in the daytime, which agrees with the results of Fejer et al. (2007) showing the ratios of PPE and IEF changes were highly variable with the local time. During the recovery phase, EIA was severely inhibited owing to a wind convergence and possibly because of the westward disturbance dynamo electric field. Zhao, B; Wan, W; Tschu, K; Igarashi, K; Kikuchi, T; Nozaki, K; Watari, S; Li, G; Paxton, LJ; Liu, L; , others; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2008 DOI: 10.1029/2008JA013054 |
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Zhao, B; Wan, W; Liu, L; Igarashi, K; Nakamura, M; Paxton, LJ; Su, S-Y; Li, G; Ren, Z; Published by: Journal of Geophysical Research: Space Physics Published on: |
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The structure of equatorial ionization anomaly seen by TIMED/GUVI limb observations Lee, I; Liu, J; Rajesh, P; Lin, C; Published by: Published on: |
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Wavenumber-4 patterns of the total electron content over the low latitude ionosphere Wan, W; Liu, L; Pi, X; Zhang, M-L; Ning, B; Xiong, J; Ding, F; Published by: Geophysical Research Letters Published on: |
| 2007 |
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Zhao, B.; Wan, W.; Liu, L.; Mao, T.; Ren, Z.; Wang, M.; Christensen, A.; Published by: Annales Geophysicae Published on: Jan-01-2007 YEAR: 2007 DOI: 10.5194/angeo-25-2513-2007 |
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Longitudinal structure of the equatorial ionosphere: Time evolution of the four-peaked EIA structure Lin, C.; Hsiao, C.; Liu, J; Liu, C.; Published by: Journal of Geophysical Research Published on: Jan-01-2007 YEAR: 2007 DOI: 10.1029/2007JA012455 |
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Longitudinal structure of the equatorial ionosphere: Time evolution of the four-peaked EIA structure Lin, C.; Hsiao, C.; Liu, J; Liu, C.; Published by: Journal of Geophysical Research Published on: Jan-01-2007 YEAR: 2007 DOI: 10.1029/2007JA012455 |
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Motions of the equatorial ionization anomaly crests imaged by FORMOSAT-3/COSMIC Lin, C.; Liu, J; Fang, T.; Chang, P; Tsai, H.; Chen, C.; Hsiao, C.; Published by: Geophysical Research Letters Published on: Jan-01-2007 YEAR: 2007 DOI: 10.1029/2007GL030741 |
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Lin, C.; Wang, W.; Hagan, M.; Hsiao, C.; Immel, T.; Hsu, M.; Liu, J; Paxton, L.; Fang, T.; Liu, C.; Published by: Geophysical Research Letters Published on: Jan-01-2007 YEAR: 2007 DOI: 10.1029/2007GL029265 |
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Lin, C.; Wang, W.; Hagan, M.; Hsiao, C.; Immel, T.; Hsu, M.; Liu, J; Paxton, L.; Fang, T.; Liu, C.; Published by: Geophysical Research Letters Published on: Jan-01-2007 YEAR: 2007 DOI: 10.1029/2007GL029265 |
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A 30-day incoherent scatter radar (ISR) experiment was conducted at Millstone Hill (288.5 E, 42.6 N) from 4 October to 4 November 2002. The altitude profiles of electron density N e Liu, L; Wan, W; Zhang, M-L; Ning, B; Zhang, S-R; Holt, JM; Published by: Published on: YEAR: 2007 DOI: 10.5194/angeo-25-2019-2007 |
| 2006 |
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The first long-duration incoherent scatter (IS) radar observations over Millstone Hill (42.6°N, 288.5°E) and EISCAT Svalbard radar (ESR, 78.15°N, 16.05°E) from October 4 to November 4, 2002 are compared with the newly updated version of the IRI model (IRI2001). The present study showed that: (1) For the peak parameters hmF2 and foF2, the IRI results are in good agreement with the observations over Millstone Hill, but there are large discrepancies over ESR. For the B parameters, the table option of IRI produces closer values to the observed ones with respect to the Gulyaeva’s option. (2) When the observed F2 peak parameters are used as input of IRI, the IRI model produces the reasonably results for the bottomside profiles during daytime over Millstone Hill, while it gives a lower bottomside density during nighttime over Millstone Hill and the whole day over ESR than what is observed experimentally. Moreover, IRI tends to overestimate the topside Ne profiles at both locations. (3) The Ti profiles of IRI can generally reproduce the observed values, whereas the IRI-produced Te profiles show large discrepancies with the observations. Overall comparative studies reveal that the agreement between the IRI predictions and experimental values is better over Millstone Hill than that over ESR. Lei, Jiuhou; Liu, Libo; Wan, Weixing; Zhang, Shun-Rong; Van Eyken, A.P.; Published by: Advances in Space Research Published on: YEAR: 2006 DOI: https://doi.org/10.1016/j.asr.2005.01.061 Ionosphere; incoherent scatter radar; Modelling and forecasting; International reference ionosphere |
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Hsu, M; Liu, J; Lin, C; Tsai, H; Paxton, L; Rajesh, P; Published by: Published on: |
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First Observations of the Ionosphere using the Tiny Ionospheric Photometer Coker, C; Dymond, KF; Budzien, SA; Chua, D; Liu, JY; Published by: Published on: |
| 2005 |
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Lin, C.; Richmond, A.D.; Liu, J.Y.; Yeh, H.C.; Paxton, L.; Lu, G.; Tsai, H.F.; Su, S.-Y.; Published by: Journal of Geophysical Research Published on: Jan-01-2005 YEAR: 2005 DOI: 10.1029/2004JA010900 |
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Hsu, M; Liu, J; Lin, C; Tsai, H; Published by: Published on: |
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Strong disturbance of the upper thermospheric density due to magnetic storms: CHAMP observations Published by: Journal of Geophysical Research: Space Physics Published on: |
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Lin, CH; RichmondJ Y Liu, AD; Yeh, HC; Paxton, LJ; Lu, G; Tsai, HF; Su, SY; Published by: Journal of Geophysical Research-Part A-Space Physics Published on: |
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The GPS-derived total electron content (TEC), ion drift measurements from the ROCSAT-1 spacecraft at around 600 km altitude, and far-ultraviolet airglow measured by the Global Ultraviolet Imager (GUVI) carried on board the NASA TIMED satellite are utilized for studying large disturbances of the low-latitude ionosphere during the October–November 2003 superstorm period. Two chains of GPS receivers, one in the American sector (∼70°W) and the other in the Asian/Australian sector (∼120°E), are used to simultaneously observe the daytime equatorial ionization anomaly (EIA) during the entire storm period. It is found from the GPS-TEC measurements that the EIA expanded to very high latitudes with large increases of TEC right after the storm started. The large expansion of the EIA was associated with strong upward E × B drifts measured from the Ionospheric Plasma and Electrodynamics Instrument (IPEI) on board the ROCSAT-1, providing evidence of a penetration electric field and a strong plasma fountain effect. Suppression of the EIA was observed during the storm recovery, associated with downward E × B drifts that were observed by the ROCSAT-1. Significant negative storm effects in the southern hemisphere were also observed in the GPS-TEC during the first day of the recovery phase. The areas of negative storm effects are in good agreement with reductions in the [O]/[N2] density ratio inferred from the ratio of OI (135.6 nm) to LBH emissions measured from GUVI. An enhancement of the EIA was observed on the day, 1 November, that the storm was about to fully recover. Lin, C.; Richmond, A.; . Y. Liu, J; Yeh, H.; Paxton, L.; Lu, G.; Tsai, H.; Su, S.-Y.; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2005 DOI: https://doi.org/10.1029/2004JA010900 |
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Global distribution of the thermospheric total mass density derived from CHAMP Liu, H; Lühr, Hermann; , Henize; Köhler, Wolfgang; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Lin, CH; Richmond, AD; Liu, JY; Yeh, HC; Paxton, LJ; Lu, G; Tsai, HF; Su, S-Y; Published by: Journal of Geophysical Research: Space Physics Published on: |