IONOSPHERIC VARIATIONS OVER WASHINGTON, D. C., BEFORE AND AFTER GEOMAGNETIC STORMS.
Abstract
Midday averages of the critical frequencies of ordinary waves of the F2- and E-regions, F sub o F2 and f sub o E, and the minimum virtual height of the E-region, hE, were computed from hourly values to represent the E and F regions at Washington, D. C. Long-term variations were removed by mathematical filtering. Superposed epoch analysis of the filtered averages revealed that: (1) h and fE are not related to magnetic storms, (2) except during sunspot minimum, fF is large 1 or 2 days before magnetic storms and small up to 3 days afterwards, (3) during sunspot minimum fF is not related to magnetic storms. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 25, 1966
- Accession Number
- AD0634841
Entities
People
- V. R. Noonkester
Organizations
- Navy Electronics Laboratory