Nobel Symposium No 31 on The Impact of Space Science on Man­ kind was held at Spatind, Norway, September 7 - 12, 1975. Twenty­ seven leading experts from the United States, the U. S. S. R. and Western Europe attended the Symposium. Four main subjects were discussed: The Impact of Space Science, introduced by Profe. ssor Reimar Lust; The Impact of Space Communica­ tion, ihtroduced by Dr Joseph Charyk; The Impact of Earth Resources Exploration from Space, introduced by Dr William Nordberg; and The Impact of Space Assisted Meteorology, introduced by Dr Robert M White. This book contains edited summaries of the papers presented at the Symposium and summaries of the discussions. The Symposium was financed by the Nobel Foundation through grants from the Tercentenary Foundation of the Bank of Sweden and organized by a special committee appointed by the Norwegian Nobel Institute. Tim Greve Finn Lied Erik Tandberg vii CONTENTS The Impact of Space Science 1 R. Lust The Impact of Space Science on Mankind (Discussion) 13 T. R. Larsen (ed. ) Satellite Communications 25 J. V. Charyk The Impact of Space Communication (Discussion) 57 G. Rosenberg (ed. ) The Impact of Earth Resources Exploration from Space 67 W. Nordberg The Impact of Earth Resources Exploration from Space 79 (Discussion) E. Tandberg (ed. ) The Environmental Satellite: What It Means for Man 91 R. M. White The Impact of Space Assisted Meteorology (Discussion) 111 E. Tandberg (ed.