TEC variability near northern EIA crest and comparison with IRI model |
| |
Authors: | Malini Aggarwal |
| |
Institution: | Solar and Space Weather Research Group, Korea Astronomy and Space Science Institute, Daejeon 305-348, South Korea |
| |
Abstract: | Monthly median values of hourly total electron content (TEC) is obtained with GPS at a station near northern anomaly crest, Rajkot (geog. 22.29°N, 70.74°E; geomag. 14.21°N, 144.9°E) to study the variability of low latitude ionospheric behavior during low solar activity period (April 2005 to March 2006). The TEC exhibit characteristic features like day-to-day variability, semiannual anomaly and noon bite out. The observed TEC is compared with latest International Reference Ionosphere (IRI) – 2007 model using options of topside electron density, NeQuick, IRI01-corr and IRI-2001 by using both URSI and CCIR coefficients. A good agreement of observed and predicted TEC is found during the daytime with underestimation at other times. The predicted TEC by NeQuick and IRI01-corr is closer to the observed TEC during the daytime whereas during nighttime and morning hours, IRI-2001 shows lesser discrepancy in all seasons by both URSI and CCIR coefficients. |
| |
Keywords: | Total electron content (TEC) Equatorial ionization anomaly (EIA) IRI model |
本文献已被 ScienceDirect 等数据库收录! |
|