@article{oai:nipr.repo.nii.ac.jp:00003997, author = {マエノ, ヒデオ and ウラツカ, セイホ and MAENO, Hideo and URATSUKA, Seiho}, journal = {Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology}, month = {Nov}, note = {P(論文), The depth-averaged attenuation coefficients are calculated from the echo pattern measurements from internal ice. The attenuation coefficients around the Sør Rondane Mountains, Antarctica were mapped from the 179MHz airborne radio-echo sounder, which made observations during 1986. The map shows a tendency of decreasing attenuation as the surface altitude of the ice sheet increases. This result is interpreted by using the relationship between attenuation coefficients and ice temperature. In addition, a cosine relationship was found between attenuation coefficients and the angle of the radar polarization from the topographic contour. The dynamic range of the variety of the attenuation coefficients is 1.2dB/100m. If the ice flow is perpendicular to the topographic contour, the ice flow direction will be derived from the polarimetric radar observation.}, title = {CHARACTERISTICS OF RADIO ATTENUATION COEFFICIENT ON THE SØR RONDARNE ICE SHEET, ANTARCTICA}, volume = {11}, year = {1997} }