Understanding of the sources of the field-aligned irregularities in the middle-latitude ionosphere
Abstract
The electron density irregularities in the ionosphere are problematic in satellite communicationand navigation systems. Extensive efforts have been made to understand the onset conditions andsources of such irregularities and to predict or avoid the impact of these irregularities on the society.While the irregularities occur in all latitudes, less attention has been paid to the irregularities inmiddle latitudes. A VHF radar was built at Daejeon (36.2°N, 127.1°E, 26.7°N dip latitude) in SouthKorea in December 2009 to study the characteristics and source of the irregularities in middlelatitudes. The Daejeon radar is worldwide a unique facility in terms of the continuous long-termobservations and enables a reliable statistical study of the middle-latitude field-aligned irregularities(FAIs). The proposed work investigates of the sources of the FAIs in the middle-latitude E and Fregions by utilizing the Daejeon radar observations and other ground-based and satelliteobservations. The sources of the middle-latitude E-region FAIs are identified by investigating therelationship between sporadic E (Es) and E-region FAIs using the Daejeon radar and Icheonionosonde observations. The sources of the middle-latitude F-region FAIs are identified byinvestigating the role of the sporadic E and medium-scale traveling ionospheric disturbances(MSTIDs) in the creation of the F-region FAIs using the GPS total electron content (TEC) and theall-sky imager observations with the Daejeon radar observations. Additionally, we also investigatethe spatial extent of the FAIs in the middle-latitude E and F regions by using the simultaneousDaejeon and MU radar observations and the electron density from Swarm satellites. A third aspect of this project is to investigate planetary-scale wave signatures in the mid-latitude E-region FAIs to determine the role that they play in the disruption of the ionosphere.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 24, 2019
- Source ID
- FA23861810107
Entities
People
- Youngsil Kwak
Organizations
- Air Force Office of Scientific Research
- Korea Astronomy and Space Science Institute
- United States Air Force