Abstract
HF and VHF backscatter measurements carried out in Northern Germany and Scandinavia (φ = 55°–70°) from 1963–1971 were analysed and are now presented comprehensively. The daily and seasonal frequency distributions of auroral backscatter echoes are derived as well as the correlation between auroral occurrences and geomagnetic disturbances and the dependence of the echo amplitude on geomagnetic latitude. By means of a calculated equivalent current system the relation between the backscatter occurrences at different stations and the extension and strength of the polar electrojet have been investigated. All observed events when combined in a synoptic graph as a function of time and geomagnetic latitude show a spiral type structure. In addition to auroral backscatter results the daily and seasonal variation of Es-scatter and 2 × F2 ground backscatter events are presented.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
