Application of Classical Kalman filtering technique in assimilation of multiple data types to NeQuick model

dc.contributor.authorMungufeni, Patrick
dc.contributor.authorMigoya-Orué, Yenca
dc.contributor.authorMatamba, Tshimangadzo Merline
dc.contributor.authorOmondi, George
dc.date.accessioned2022-03-22T07:56:41Z
dc.date.available2022-03-22T07:56:41Z
dc.date.issued2022-03-03
dc.description.abstractThis study attempts to improve estimation of ionospheric electron density profiles over Korea and adjacent areas by employing classical Kalman filtering technique to assimilate Total Electron Content (TEC) data from various sources into the NeQuick model. Successive corrections method was applied to spread the effect of TEC data assimilation at a given location to others that lacked TEC observations. In order to reveal that the assimilation results emulate the complex ionospheric changes during geomagnetic storms, the selected study days included both quiet (Kp ≤ 3) and disturbed geomagnetic conditions in the year 2015. The results showed that assimilation of TEC data derived from ground-based GPS receivers can improve the root mean squared error (RMSE) associated with the NeQuick model estimation of ionospheric parameters by ≥ 56 %. The improvement of RMSE achieved by assimilating TEC data that were measured using ionosondes was ~50 %. The assimilation of TEC observations made by the COSMIC radio occultation technique yielded results that depicted RMSE improvement of > 10 %. The assimilation of TEC data measured by GPS receiver onboard Low Earth Orbiting satellites yielded results that revealed 1 deterioration of RMSE. This outcome might be due to either the fact that the receivers are on moving platforms and these dynamics might have not been accounted for during TEC computation or limitation of the assimilation process. Validation of our assimilation results with global ionosphere TEC data maps as processed at the center for orbit determination in Europe (CODE) revealed that both depicted similar TEC changes, showing response to a geomagnetic storm.en_US
dc.identifier.citationMungufeni, P., Migoya-Orué, Y., Matamba, T. M., Omondi, G. (2022). Application of Classical Kalman filtering technique in assimilation of multiple data types to NeQuick model. Journal of Space Weather and Space Climate.en_US
dc.identifier.issn2115-7251
dc.identifier.urihttps://dir.muni.ac.ug/handle/20.500.12260/449
dc.publisherEDP Sciencesen_US
dc.subjectIonosphereen_US
dc.subjectModelingen_US
dc.subjectData assimilationen_US
dc.subjectNeQuicken_US
dc.subjectGeomagnetic stormsen_US
dc.titleApplication of Classical Kalman filtering technique in assimilation of multiple data types to NeQuick modelen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Mungufeni.pdf
Size:
1.02 MB
Format:
Adobe Portable Document Format
Description:
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description: