Comparison of E layer critical frequency over the Thai station Chumphon with IRI. Issue 8 (15th April 2015)

• Record Type: Journal Article
• Authors: Wongcharoen, P.; Kenpankho, P.; Supnithi, P.; Ishii, M.; Tsugawa, T.
• Is Part Of: Advances in space research. Volume 55:Issue 8(2015)
• Page Start: 2131
• Page End: 2138
• Publication Date: 2015-04-15
• Subjects: Space sciences -- Periodicals; Astronautics -- Periodicals; Geophysics -- Periodicals; 500.505
• DOI: 10.1016/j.asr.2015.01.031
• Languages: English
• ISSNs: 0273-1177

Abstract

<abstract xml:lang="en" abstract-type="author" id="ab005"> <title id="st060">Abstract</title> <sec> <p id="sp0005">In this research, as a part of working towards improving the IRI over magnetic equatorial region, the critical frequency of E layer in the ionosphere (<italic>fo</italic>E) derived from the ionogram at Chumphon station (10.72°N, 99.37°E), Thailand, during 2005–2008 is analyzed. The Chumphon station is located in the magnetic equatorial region at the magnetic latitude of 3.22°N. The seasonal variation of the <italic>fo</italic>E measurements is compared to the IRI <italic>fo</italic>E predictions with the optional input in the sunspot number (Rz12) and the solar radio noise flux (F10.7). For a declining phase of the solar cycle 23 during the year 2005–2008, the study shows that the IRI <italic>fo</italic>E prediction is similar to the <italic>fo</italic>E observation during the period of 2005–2008. The maximum differences between the IRI <italic>fo</italic>E prediction and <italic>fo</italic>E observation are about 500 kHz during daytime period of 2007.</p> </sec> </abstract>