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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Equatorial zonal electric fields inferred from a 3-D electrostatic potential model and ground-based magnetic field measurements

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Author(s):
Shume, E. B. [1] ; de Paula, E. R. [1] ; Maus, S. [2] ; Hysell, D. L. [3] ; Rodrigues, F. S. [4] ; Bekele, A. [5]
Total Authors: 6
Affiliation:
[1] INPE DAE, Natl Inst Space Res, BR-12227010 Sao Paulo - Brazil
[2] NOAA, Natl Geophys Data Ctr, Boulder, CO 80305 - USA
[3] Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14853 - USA
[4] Atmospher & Space Technol Res Associates, San Antonio, TX 78249 - USA
[5] Univ Addis Ababa, Dept Phys, Addis Ababa - Ethiopia
Total Affiliations: 5
Document type: Journal article
Source: JOURNAL OF GEOPHYSICAL RESEARCH; v. 114, JUN 6 2009.
Web of Science Citations: 4
Abstract

We present a new technique to infer quiet time zonal electric fields in the daytime equatorial ionosphere. The electric field inference technique utilizes a three-dimensional (3-D) electrostatic potential model of the low-latitude ionosphere constrained by ground-based magnetic field measurements. To test this technique, inferred zonal electric fields for the Peruvian sector in Jicamarca (11.95 degrees S, 283.13 degrees E, 0.6 degrees N dip latitude) were compared with zonal electric field (vertical drift) measurements made by the Jicamarca Incoherent Scatter Radar. The comparison shows a good agreement between the inferred and measured electric fields. An example of electric field estimation for Davao (7.4 degrees N, 125.4 degrees E, 0.58 degrees S dip latitude) in the Philippines sector is also presented in this report. Inferred electric fields for Davao are in good agreement with F region vertical plasma drifts measured by drift sensors onboard the AE-E and ROCSAT-1 satellites on that longitude sector. Our results suggest that realistic estimates of quiet time zonal electric fields for the equatorial ionosphere can be obtained from the 3-D potential model whenever observatory magnetic field measurements are available. (AU)

FAPESP's process: 07/08185-9 - Multi-instrument and modeling investigation of the Equatorial Electrojet and 150 km echo plasma irregularities in the Brazilian sector
Grantee:Esayas Belay Shume
Support type: Scholarships in Brazil - Post-Doctorate