3D Investigation into the Origin of Mid-Latitude Scintillation and Its Effect on Trans-Ionospheric Radio Signals (UHF)
Abstract
The stated broad research title was pursued under the following five subtopics: In the first subtopic, we analyzed the occurrence of ionospheric irregularities over South Korea and Japan (mi d latitudes) during the years 2010 2015. The irregularities were quantified using the rate of change of total electron content (TEC) index (ROTI), which detects irregularities with scale sizes in the range of 400m 2.5km. The ROTI threshold for an ionospheric irregularity to have occurred was set as 0.1 TECU/min. Results showed that ionospheric irregularities mostly occur during night time and around local noon time in the seasons of spring and summer. In addition, the percentage of ionospheric irregularities had a high positive correlation with solar flux (F10.7) (r > 0.72). For the first time, we showed good correspondence between ionospheric irregularities measured by the ROTI index and sporadic E (Es). The median ROTI associated with ionospheric irregularities over a South Korea station (DAEJ) and a Japan station (KGNI) were 0.131 and 0.125 TECU/min, respectively. However, in severe cases of ionospheric irregularities, the ROTI values over DAEJ (KGNI) can reach 0.246 (0.217) and 0.314 (0.339) TECU/min during day and night, respectively. These critical ROTI values can be important in interpreting and monitoring respectively.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 26, 2022
- Accession Number
- AD1180404
Entities
People
- Yong Ha Kim
Organizations
- Chungnam National University