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| Content Provider | CSIR - National Institute of Science Communication and Policy Research (NISCPR) |
|---|---|
| Author | Ehinlafa, O. E. |
| Abstract | The validation of M(3000)F2 estimation of hmF2 based on four different formulated models, viz: Shimazaki, Bradley & Dudeney, Dudeney and Bilitza et al. at an equatorial station in West Africa are carried out during high solar activity period (1991) to ensure its conformity with observed and International Reference Ionosphere (IRI) model. Fifteen (15)-day local time data during the solstice months (December and June) and equinox months (March and September) are selected and analyzed. The results obtained show that the M(3000)F2 estimation of hmF2 from the ionosonde measured values [using the Ionospheric Prediction Service (IPS-42) sounder] compared to the observed values (deduced using an algorithm from scaled virtual heights of quiet day ionograms) are highly correlated with Bilitza model. International Reference Ionosphere (IRI-2012) model for the equatorial region also agrees with the formulation developed by Bilitza et al. for the four different seasons of the year. Also, hmF2 is highest (548 km) in summer (June solstice) season and lowest (471 km) in autumn (March equinox) season with daytime peaks occurring at 1300 hrs LT during the solstices and at 1000 hrs LT during the equinoxes, respectively. Also, the post-sunset peaks are highest (596 km) in the winter season (December solstice) and lowest (556 km) in the autumn season (September equinox) both occurring during 1800 – 2100 hrs LT. |
| Ending Page | 10 |
| Starting Page | 5 |
| ISSN | 03678393 |
| e-ISSN | 0975105X |
| Journal | Indian Journal of Radio & Space Physics (IJRSP) |
| Issue Number | 01 |
| Volume Number | 45 |
| Language | English |
| Publisher | CSIR-NISCAIR, India |
| Publisher Date | 2016-03-01 |
| Access Restriction | Open |
| Rights License | CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| Subject Keyword | Peak electron density height F2 layer peak height High solar activity Equatorial M(3000)F2 estimation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences Physics and Astronomy |
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