Pulsing hiss,pulsating aurora and micropulsations |
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| Affiliation: | 1. Fisheries and Oceans Canada, Gulf Fisheries Centre, P.O. Box 5030, Moncton, New Brunswick, E1C 9B6, Canada;2. Fish and Wildlife Research Institute (FWRI), Florida Fish and Wildlife Conservation Commission (FWC), 100 Eighth Avenue SE, St. Petersburg, FL 33701 USA;3. Woods Hole Center for Oceans and Human Health, Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, MA, 02543 USA;4. Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83S, DK-1307 Copenhagen K, Denmark;5. Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy;6. Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, 16310 Bachok, Kelantan, Malaysia;1. Discovery and Preclinical Research Division, Taiho Pharmaceutical Co., Ltd., Ibaraki, Japan;2. Department of Otorhinolaryngology, International University of Health and Welfare School of Medicine, Chiba, Japan;1. Research Centre for Crystalline Materials, School of Science and Technology, Sunway University, No. 5 Jalan Universiti, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia;2. Office of the Provost, Sunway University, No. 5 Jalan Universiti, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia;1. Vascular Centre Malmö, Skåne University Hospital, Malmö, Sweden;2. Department of Vascular Surgery, University Hospital of Novara, Novara, Italy;2. Institute for Engineering and Sustainable Development (IEDS), University for the International Integration of the Afro-Brazilian Lusophony – UNILAB, Redenção, Ceará, Brazil |
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| Abstract: | Simultaneous conjugate observations between the GEOS 2 geostationary satellite, an all-sky TV camera operated at Andenes, Norway and a magnetometer at Tromsø, are presented. A close correlation was found between the occurrence of pulsing ELF hiss on GEOS 2, pulsating aurora observed with the TV camera and the ground detected micropulsations. However, a one-to-one correlation between the individual pulses of all three phenomena was generally not found. Ten events were chosen for a case study where the optical pulsations could be classed into two types (either classical pulsating patches or propagating forms). Classical pulsations were seen to be associated with Pi(b) micropulsations while propagating forms showed a one-to-one correlation with Pi(c) micropulsations. Type matching between the optical pulsations and two different types of ELF hiss, agreed well on a statistical basis, but the exact relationship for individual events was not so clear. On occasions, the micropulsations possessed major frequency components whose periods were longer than the periods of the other two phenomena. This is shown to imply that the observed micropulsations were of ionospheric origin in these cases. |
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