Sudden disappearance of vhf radar echoes from equatorial e-region irregularities

Rastogi, R. G.; Fejer, B. G.; Woodman Pollitt, Ronald Francisco

Sudden disappearance of vhf radar echoes from equatorial e-region irregularities

Abstract

The Modified Range Time lntensity Technique for studying the height variation of the (back-scatter power of vhf radar echoes at Jicamarca has been used to show that the growth lime of E-region irregularities is less than 1 min. Further, these irregularities disappear or reappear precisely at the time when AH at an equatorial minus AH at a non-equatorial station is close to zero irrespective of absolute H over the dip equator. This is consistent with the idea that E-region irregularities over the dip equator scattering the hf or vhf radio waves are due to gradient drift instability and supports the double-current hypo1hcsis for the equatorial electrojet.

Date

1977-01

Keywords

Echoes , Ionosphere , Incoherent Scattering Radar , E Region

Citation

Rastogi, R. G., Fejer, B. G., & Woodman, R. F. (1977). Sudden disappearance of vhf radar echoes from equatorial e-region irregularities. Indian Journal of Radio & Space Physics, 6, 39-43.