Abstract Over 70 ionograms were selected from the ground-based ionosonde in Hanoi, Vietnam at times when the AE-E satellite passed above the station. N(h) profiles were calculated from ionograms and thus compared with the IRI model and local AE-E ion densities. For the purpose of the presentation, 15 profiles were selected to cover all seasons and local times. The comparison shows that the observed daytime N(h) profiles have significantly higher gradients below the F2 peak density while at night the observed and the IRI profiles almost coincide. The difference is more pronounced in summer than in equinox. Wintertime comparisons are quite limited and do not lead to reliable conclusions. NmF2 values taken from the CCIR programme are compared with those observed. The comparison shows that the deviations are not so large.


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    Title :

    Bottomside N(h) profiles over Vietnam and their comparison with IRI


    Contributors:
    Hoang, L. (author) / Serafimov, K.B. (author) / Kutiev, I. (author) / Karadimov, M. (author)

    Published in:

    Publication date :

    1984-01-01


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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