Incoherent scatter radar measurement of E-region electric field at Arecibo

Details Incoherent scatter radar measurement of E-region electric field at Arecibo Incoherent scatter radar measurement of E-region electric field at Arecibo

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa23a1789z&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA23A-1789

Physics

[2411] Ionosphere / Electric Fields, [2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2437] Ionosphere / Ionospheric Dynamics, [2443] Ionosphere / Midlatitude Ionosphere

Scientific paper

We report the first spatially and temporally continuous measurements of the upward electric field in the E-region using the Arecibo incoherent scatter radar. This is achieved by employing the dual beam capability of the Arecibo incoherent scatter radar. The magnitude of the vertical electric field is the difference between a scaled vertical ion drift and the upward component of the VxB drift. Using a theoretical ion-neutral collision model, the Lorentz force can largely account for the scaled upward drift around 118 km. This implies that the magnitude of the electric field is relatively small around this altitude. Our observation suggests that the ion drift equals to ExB/B2 at an altitude above ~133 km. In general, the vertical electric field shows large height variation. If we make the usual assumption that the electric field along the field line is negligible, the height variation is the same as the horizontal variation at Arecibo. This explanation, however, is not consistent with our observation. We further discuss the error sources that affect the measurement of the electric field.

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