Neutral wind estimation from 4-D ionospheric electron density images

Details Neutral wind estimation from 4-D ionospheric electron density images Neutral wind estimation from 4-D ionospheric electron density images

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jgra..11406317d&link_type=abstract

Journal of Geophysical Research, Volume 114, Issue A6, CiteID A06317

Physics

1

Ionosphere: Modeling And Forecasting, Ionosphere (6929), Ionosphere: Instruments And Techniques, Radio Science: Tomography And Imaging (7270, 8180)

Scientific paper

We develop a new inversion algorithm for Estimating Model Parameters from Ionospheric Reverse Engineering (EMPIRE). The EMPIRE method uses four-dimensional images of global electron density to estimate the field-aligned neutral wind ionospheric driver when direct measurement is not available. We begin with a model of the electron continuity equation that includes production and loss rate estimates, as well as E × B drift, gravity, and diffusion effects. We use ion, electron, and neutral species temperatures and neutral densities from the Thermosphere Ionosphere Mesosphere Electrodynamics General Circulation Model (TIMEGCM-ASPEN) for estimating the magnitude of these effects. We then model the neutral wind as a power series at a given longitude for a range of latitudes and altitudes. As a test of our algorithm, we have input TIMEGCM electron densities to our algorithm. The model of the neutral wind is computed at hourly intervals and validated by comparing to the “true” TIMEGCM neutral wind fields. We show results for a storm day: 10 November 2004. The agreement between the winds derived from EMPIRE versus the TIMEGCM “true” winds appears to be time-dependent for the day under consideration. This may indicate that the diurnal variation in certain driving processes impacts the accuracy of our neutral wind model. Despite the potential temporal and spatial limits on accuracy, estimating neutral wind speed from measured electron density fields via our algorithm shows great promise as a complement to the more sparse radar and satellite measurements.

Affiliated with

Also associated with

No associations

Rating

Neutral wind estimation from 4-D ionospheric electron density images does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Neutral wind estimation from 4-D ionospheric electron density images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutral wind estimation from 4-D ionospheric electron density images will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1630645