LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
N. K. Sethi; N. K. Sethi; M. K. Goel; K. K. Mahajan (2002)
Publisher: Copernicus Publications
Journal: Annales Geophysicae
Languages: English
Types: Article
Subjects: Geophysics. Cosmic physics, Q, Science, Physics, QC1-999, QC801-809

Classified by OpenAIRE into

arxiv: Physics::Space Physics, Physics::Geophysics, Astrophysics::Solar and Stellar Astrophysics
Noontime monthly median values of F2-layer critical frequency foF2 (m) for some ionospheric stations representing low- and mid-latitudes are examined for their dependence on solar activity for the years 1957 (IGY) to 1990. This is the period for which ionospheric data in digital form is available in two CD-ROMs at the World Data Center, Boulder. It is observed that at mid-latitudes, foF2 (m) shows nearly a linear relationship with R12 (the 12-month running average of the Zurich sunspot number), though this relation is nonlinear for low-latitudes. These results indicate some departures from the existing information often used in theoretical and applied areas of space research.

Key words. Ionosphere (equatorial ionosphere; mid-latitude ionosphere; modelling and forecasting)
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Bilitza, D.: (Ed) NSSDC 90-22, World Data Center A, Rockets and Satellites Greenbelt, Md, USA, November, 1990.
    • Bilitza, D.: International Reference Ionosphere - Status 1995/96, Adv. Space Res., 20, 9, 1751-1754, 1997.
    • Bilitza, D.: International Reference Ionosphere 2000, Radio Science, 36, 2, 261-275, 2001.
    • Huang, C.-M.: Some abnormalities in the variations of F2-layer critical frequency during the period of high solar activity of solar cycle 8-19, J. Geophys. Res., 65, 897-906, 1960.
    • Jones, W. B. and Gallet, R. M.: The representation of diurnal and geographic variations of ionospheric data by numerical methods, Telecomm. J., 29, 129-147, 1962.
    • Jones, W. B. and Gallet, R. M.: The representation of diurnal and geographic variations of ionospheric data by numerical methods, Telecomm. J., 32, 18-28, 1965.
    • Mitra, S. K.: The Upper Atmosphere, 2nd edition, The Asiatic Society, Calcutta, 1952.
    • NGDC: National Geophysical Data Center, NOAA, Mail Code E / GC2, 325 Broadway, Boulder, Colorado, 80303 USA., 1994.
    • Rao, M. S. V. G. and Rao, R. S.: The hysteresis variation in F2-layer parameters, J. Atmos. Terr. Phys., 31, 1119-1125, 1969.
    • Rush, C. M., PoKempner, M., Anderson, D. N., Stewart, F. G., and Perry, J.: Improving ionospheric maps using theoretically derived values of foF2, Radio Science, 18, 95-107, 1983.
    • Rush, C. M., PoKempner, M., Anderson, D. N., Perry, J., Stewart, F. G., and Reasoner, R.: Maps of foF2 derived from observations and theoretical data., Radio Science, 19, 1083-1097, 1984.
  • No related research data.
  • Discovered through pilot similarity algorithms. Send us your feedback.

Share - Bookmark

Cite this article