RELATION BETWEEN THE SPECIAL RADAR ECHO FROM WITHIN THE ICE SHEET AND THE CONFIGURATION OF THE GROUND (I)

元データ 国立極地研究所

概要

It has been considered very difficult to analyze radar echos except for those of standard form. In this work we have attemped to estimate ground structures under an ice sheet using nonstandard radar echos. We determined the standard radar echo from the thick ice sheet and ground of the Antarctic Continent under it, and succeeded in simulating nonstandard radar echos. We have calculated the discrepancy from a standard radar echo by a simulation method, and estimated the influence of cracks and of the temperature profile within the ice sheet, volcanic ash and meteorites in the ice sheet, and shape and water content of the boundary between ice sheet and ground of the Antarctic Continent. As the gradients of temperature and density of the ice sheet are very small, the radar echo is not influenced by these within an ice sheet up to at 350-600m thick. We succeeded in estimating the shape, temperature and roughness of the ground under the ice sheet.

著者

Watanabe Okitsugu National Institute of Polar Research, Research Organization of Information and Systems
Watanabe Okitsugu National Institute Of Polar Research
Wada Makoto National Institute For Polar Research
Nishio F Hokkaido University Of Education Kushiro Branch
Nishio Fumihiko National Institute Of Polar Research
HOSHIYAMA Mitsuo Research Institute of Applied Electricity, Hokkaido University
NISHITSUJI Akira Research Institute of Applied Electricity, Hokkaido University
NISHITSUJI Akira Muroran Institute of Technology
西尾 文彦 Hokkaido University Of Education Kushiro Branch
Nishitsuji Akira Faculty Of Engineering Muroran Institute Of Technology:faculty Of Business Administration And Inform
Nishitsuji Akira The Institute Of Applied Electricity Hokkaido University
Hoshiyama Mitsuo Research Institute For Electronic Science Hokkaido University
Wada Makoto National Institute Of Polar Research Organization Of Information And Systems
Wada Makoto National Inst. Polar Res. Tokyo

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