Kenpankho, Prasert

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Kenpankho, Prasert
Alternative Name
Kenpankho, P.
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Email
prasert.ke@kmitl.ac.th

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    Item type:Publication,
    The variation of critical frequency of E layer over Chumphon, Thailand
    (2013-12-09)
    Wongcharoen, Poramintra
    ;
    Kenpankho, Prasert
    ;
    Sepsirisuk, Kasemsuk
    ;
    Supnithi, Pornchai
    ;
    Noppanakeepong, Suthichai
    In this research paper presents the observed critical frequency of E layer (foE) over Chumphon, Thailand which is located at nearly the magnetic equator (lat. 10.72° long. 99.37° dip. 3°) during September 2004 to August 2005. The foE is one of essential parameters in the International Reference Ionsphere (IRI) model. We investigate the variation of the observed foE by comparing to the Sun spot number, ionospheric index, and 10.7 cm. flux. Due to essentially of accurate IRI model can be used to applied in communication such as it may be implied tendency of phenomena in E layer effect on high frequency communication over Chumphon, Thailand. © 2013 IEEE.
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    Item type:Publication,
    Comparison of e layer critical frequency over the Thai station Chumphon with IRI
    (2015-04-15)
    Wongcharoen, P.
    ;
    Kenpankho, P.
    ;
    Supnithi, P.
    ;
    Ishii, M.
    ;
    Tsugawa, T.
    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 (foE) 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 foE measurements is compared to the IRI foE 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 foE prediction is similar to the foE observation during the period of 2005-2008. The maximum differences between the IRI foE prediction and foE observation are about 500 kHz during daytime period of 2007.