HR: 1340h
AN: G53A-0118    [Abstracts]
TI: Comparison of TEC Measurements from Dual-Frequency Space Geodetic Techniques
AU: * Ge, S
EM: ge.18@osu.edu
AF: Laboratory for Space Geodesy and Remote Sensing, The Ohio State University, 470 Hitchcock Hall, 2070 Neil Ave., Columbus, OH 43210 United States
AU: Shum, C
EM: ckshum@osu.edu
AF: Laboratory for Space Geodesy and Remote Sensing, The Ohio State University, 470 Hitchcock Hall, 2070 Neil Ave., Columbus, OH 43210 United States
AU: Potts, L
EM: Potts.3@osu.edu
AF: Laboratory for Space Geodesy and Remote Sensing, The Ohio State University, 470 Hitchcock Hall, 2070 Neil Ave., Columbus, OH 43210 United States
AU: Yi, Y
EM: yi.3@osu.edu
AF: Laboratory for Space Geodesy and Remote Sensing, The Ohio State University, 470 Hitchcock Hall, 2070 Neil Ave., Columbus, OH 43210 United States
AU: Hobiger, T
EM: hobiger@nict.go.jp
AF: Institute of Geodesy and Geophysics, Vienna University of Technology, Gusshausstr. 27-29, Wien, 1040 Austria
AU: Hobiger, T
EM: hobiger@nict.go.jp
AF: Kashima Space Research Center, National Institute of Information and Communications Technology, Japan, Tokyo, 184-8795 Japan
AU: Schuh, H
EM: harald.schuh@tuwien.ac.at
AF: Institute of Geodesy and Geophysics, Vienna University of Technology, Gusshausstr. 27-29, Wien, 1040 Austria
AU: Bilitza, D K
EM: bilitza@mail630.gsfc.nasa.gov
AF: Raytheon ITSS, NASA Goddard Space Flight Center, NSSDC/SPDF, Code 633/632, Greenbelt, MD 20771 United States
AU: Callahan, P
EM: philip.s.callahan@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr, Pasadena, CA 91109 United States
AU: Ping, J
EM: jsping@miz.nao.ac.jp
AF: Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai, 200030 China
AU: Ping, J
EM: jsping@miz.nao.ac.jp
AF: National Astronomical Observatory, Hoshi-ga-oka 2-12, Mizusawa, 023-0861 Japan
AU: Matsumoto, K
EM: matumoto@miz.nao.ac.jp
AF: National Astronomical Observatory, Hoshi-ga-oka 2-12, Mizusawa, 023-0861 Japan
AB: Various space geodetic techniques can provide ionosphere information from their dual frequency measurements. These independent data sources can be used for cross-validation purposes and as multiple data types to improve ionosphere modeling. Global Ionosphere Map (GIM) is generated through mapping of the slant Total Electron Contents (TEC) from satellite to the global ground receiver network to zenith direction. The notable GIM data products include those of the NASA/JPL GIM and the CODE GIM. Dual frequency altimeters (TOPEX/POSEIDON or JASON-1 or ENVISAT) in addition to producing data for oceanographic research also produce ionospheric TEC along their nadir tracks. These data are perhaps the most precise available but have particular geographic and temporal sampling pattern that may reduce their global utility. In addition, these data need to be calibrated and validated against other data types. Global VLBI measurements spanning over two solar cycles, though relatively sparse in terms of global stations, represent another independent data type for relative ionosphere measurements. DORIS tracking system onboard of various altimetric satellites and on Spot-n constitutes another relative ionosphere measuring device from space. In this work, we provide a comparison study of various techniques for assessing their applicability to ionosphere modeling as well as measurements validations.
DE: 2400 IONOSPHERE
DE: 2499 General or miscellaneous
DE: 1243 Space geodetic surveys
DE: 1299 General or miscellaneous
SC: Geodesy [G]
MN: 2004 AGU Fall Meeting