High resolution mapping of TEC perturbations with the GSI GPS Network over Japan

Two-dimensional total electron content (TEC) perturbations over Japan are mapped with the Geographical Survey Institute (GSI) GPS network, GEONET (GPS Earth Observation Network). Its spatial resolution is 0.15° latitude × 0.15° longitude and temporal resolution is 30 seconds. Two-dimensional TEC observations with these high resolutions revealed spatial structures and temporal evolutions of traveling ionospheric disturbances (TIDs) in the nighttime mid-latitude ionosphere on July 03, 1997. A preliminary result of the TEC perturbation mapping indicates that it would be a strong tool to investigate the ionospheric structures in detail. Coordinated observations with other ionospheric observation techniques, such as incoherent scatter (IS) radars, airglow imagers, and ionosondes, are needed to clarify the vertical structure of the ionosphere.

[1]  L. J. Romans,et al.  Imaging the ionosphere with the global positioning system , 1994, Int. J. Imaging Syst. Technol..

[2]  Clark A. Miller,et al.  Electrodynamics of midlatitude spread F 3. Electrohydrodynamic waves? A new look at the role of electric fields in thermospheric wave dynamics , 1997 .

[3]  L. Blomberg,et al.  Conjugate observations of the mid-latitude electric field fluctuations with the MU radar and the Freja satellite , 1998 .

[4]  Anthony J. Mannucci,et al.  Subdaily northern hemisphere ionospheric maps using an extensive network of GPS receivers , 1995 .

[5]  Hiromichi Tsuji,et al.  Coseismic crustal deformation from the 1994 Hokkaido‐Toho‐Oki Earthquake Monitored by a nationwide continuous GPS array in Japan , 1995 .

[6]  Anthony J. Mannucci,et al.  Sub-Daily Northern Hemisphere Ionospheric Maps Using the IGS GPS Network , 1993 .

[7]  M. Yamamoto,et al.  Turbulent upwelling of the mid‐latitude ionosphere: 1. Observational results by the MU radar , 1991 .

[8]  S. Musman,et al.  Simultaneous Global Positioning System and radar observations of equatorial spread F at Kwajalein , 1996 .

[9]  Michel Sébrier,et al.  Is the slip rate variation on the Great Sumatran Fault accommodated by fore‐arc stretching? , 1995 .

[10]  Jaume Sanz,et al.  High resolution TEC monitoring method using permanent ground GPS receivers , 1997 .

[11]  S. Fukao,et al.  A climatology of F region gravity wave propagation over the middle and upper atmosphere radar , 1997 .

[12]  Xiaoqing Pi,et al.  Global ionosphere perturbations monitored by the Worldwide GPS Network , 1996 .

[13]  S. Fukao,et al.  Possible evidence of gravity wave coupling into the mid‐latitude F region ionosphere during the SEEK Campaign , 1998 .

[14]  S. Musman,et al.  Imaging spread‐F structures using GPS observations at Alcântara, Brazil , 1997 .

[15]  A. Rius,et al.  Estimation of the transmitter and receiver differential biases and the ionospheric total electron content from Global Positioning System observations , 1994 .

[16]  F. S. Johnson,et al.  Lower midlatitude ionospheric disturbances and the perkins instability , 1992 .

[17]  R. Yantosca,et al.  GPS phase fluctuations in the equatorial region during the MISETA 1994 campaign , 1996 .

[18]  L. H. Brace,et al.  Conjugate occurrence of the electric field fluctuations in the nighttime midlatitude ionosphere , 1995 .

[19]  Guanghui Wu,et al.  Observations of traveling ionospheric disturbances with a satellite-beacon radio interferometer : seasonal and local time behavior , 1995 .

[20]  J. L. Scali,et al.  Electrodynamics of midlatitude spread F: 1. Observations of unstable, gravity wave‐induced ionospheric electric fields at tropical latitudes , 1997 .

[21]  G. G. Bowman.  A review of some recent work on mid-latitude spread-F occurrence as detected by ionosondes. , 1990 .

[22]  Bodo W. Reinisch,et al.  Investigations of thermospheric‐ionospheric dynamics with 6300‐Å images from the Arecibo Observatory , 1997 .

[23]  T. Jones,et al.  HF Doppler observations of medium-scale travelling ionospheric disturbances at mid-latitudes , 1986 .

[24]  Paul M. Kintner,et al.  Total electron content variations due to nonclassical traveling ionospheric disturbances: Theory and Global Positioning System observations , 1997 .

[25]  T. Georges.  HF Doppler studies of traveling ionospheric disturbances , 1968 .

[26]  J. Aarons,et al.  Global positioning system phase fluctuations at auroral latitudes , 1997 .

[27]  Giulio Ruffini,et al.  Improving the vertical resolution of ionospheric tomography with GPS Occultations , 1997 .