Substorm Observations at L=4

• Main Author: Chivers, H.J.A.
• Language: English
• Published: 1976
• Subjects: Siple; Antarc*; Antarctica; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/record/843/files/KJ00000011817.pdf

P(論文) Observations of auroral absorption associated with substorms have been made at Siple Station, Antarctica (L=4) with a newly developed riometer system. The instrument is run in conjunction with various VLF experiments, together with magnetometer and micropulsation observations. Features of the riometer system are described with special reference to a technique which has been devised to improve the dynamic range and resolution of the absorption measurements. The initial results from a study of phenomena recorded simultaneously with the various instruments are presented. The results confirm earlier observations made at a high latitude station, but with the fast time constant of the recording system a wide variety of detailed interrelationships between the various phenomena have been revealed. In particular, although variations in the micropulsation activity and the absorption record correspond very closely once an event is underway, the micropulsation activity nearly always precedes the onset of absorption by an amount which varies significantly for event to event. departmental bulletin paper