TY - GEN

T1 - Imaging and modelling of the main ionospheric trough using radio tomography

AU - Mitchell, C. N.

AU - Kersley, L.

AU - Pryse, S. E.

AU - Willson, C. A.

AU - Heaton, J. A. T.

AU - Cannon, Paul S.

AU - Rogers, N. C.

PY - 1999

Y1 - 1999

N2 - Information derived from tomographic images has demonstrated the extreme variability of the ionosphere over the UK, with structures within the electron concentration usually associated with the auroral zone being found at UK latitudes under disturbed geomagnetic conditions. The tomographic images indicate that the main trough in the F-layer electron concentration is routinely present over the northern UK at nighttime. With an enhanced geomagnetic disturbance the progression of the trough to lower latitudes is evidenced, while extremely disturbed conditions result in the trough minimum being as far south as northern France. The applicability of the tomographic technique to the production of an ionospheric model, that includes the prominent main trough in the plasma electron concentration, has been demonstrated. Initial results indicate that the model shows potential for modelling an accurate representation of the main trough extending to some 30° in longitude from the location of the input data. Ray tracing through the resulting tomographic images and the model of the mid-latitude trough has direct applications for the near-real-time determination of radio propagation conditions.

AB - Information derived from tomographic images has demonstrated the extreme variability of the ionosphere over the UK, with structures within the electron concentration usually associated with the auroral zone being found at UK latitudes under disturbed geomagnetic conditions. The tomographic images indicate that the main trough in the F-layer electron concentration is routinely present over the northern UK at nighttime. With an enhanced geomagnetic disturbance the progression of the trough to lower latitudes is evidenced, while extremely disturbed conditions result in the trough minimum being as far south as northern France. The applicability of the tomographic technique to the production of an ionospheric model, that includes the prominent main trough in the plasma electron concentration, has been demonstrated. Initial results indicate that the model shows potential for modelling an accurate representation of the main trough extending to some 30° in longitude from the location of the input data. Ray tracing through the resulting tomographic images and the model of the mid-latitude trough has direct applications for the near-real-time determination of radio propagation conditions.

U2 - 10.1049/cp:19990048

DO - 10.1049/cp:19990048

M3 - Conference contribution/Paper

SN - 0852967136

T3 - IEE CONFERENCE PUBLICATIONS

SP - 192

EP - 195

BT - IEE National Conference on Antennas and Propagation

PB - IEE

CY - Edison

T2 - IEE National Conference on Antennas and Propagation

Y2 - 31 March 1999 through 1 April 1999

ER -