Variability of the F-region parameter h0.5

Details Variability of the F-region parameter h0.5 Variability of the F-region parameter h0.5

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15r..51m&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 15, no. 2, p. 51-60

Computer Science

Sound

Annual Variations, Diurnal Variations, Electron Density Profiles, F Region, Ionospheric Electron Density, Ionospheric Sounding, Variability, Ionograms, Ionosondes, Reference Atmospheres

Scientific paper

High resolution electron density profiles, measured with the Arecibo incoherent scatter radar have been used to derive h0.5, the height of the half density point. More than 2400 profiles, for the period August 1974 - May 1977, have been used to study the behaviour of this parameter. Our analysis shows that during the night, h0.5 varies mostly between 200 and 350 km, but during the day the excursion is larger and values lower than 150 km are also seen. These lower values are often coincident with the presence of a layer (F1) between h0.5 and hmF2. We have therefore, divided the daytime data into two classes, class 'A' where h0.5 is more than hmF1 and class 'B' where h0.5 is less than hmF1. We find that in both the classes, most of the variability in h0.5 is due to the variability in hmF2 and a linear relationship between h0.5 and hmF2 is seen, although the dispersion in class 'B' is larger. Within the same class, no difference is seen in the relationship between day and night. We also compare the parameter Y0.5/hmF2 obtained from the Arecibo measurements with that calculated from the International Reference Ionosphere (IRI)-90 model, based upon Gulyaeva's (1987) formula. In class 'A' the median values of this parameter vary between 0.15 and 2.0 with no major seasonal differences. The IRI values, however, are significantly larger. On the other hand, class 'B' shows larger seasonal differences, particularly between summer and winter, but the discrepancy with the IRI is somewhat smaller.

Affiliated with

Also associated with

No associations

Rating

Variability of the F-region parameter h0.5 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Variability of the F-region parameter h0.5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variability of the F-region parameter h0.5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1629640