The discussion at the G3 symposium was also related to the gravitational field of the Moon and
planets where three papers were presented. One of the papers, by Lemoine et al. appearing in this
volume, describes significant new results using Clementine data to determine an expansion of the
Moon's gravitational field to degree 70.
The papers in this volume represent a state of the art in terms of our knowledge of the
gravitational field of the Earth. Current results are exciting in themselves, but one also sees the
strides that can be made in the near future.
One clearly missing link in these papers relates to a discussion on techniques for the improved
determination of the Earth's gravitational field from new dedicated satellite gravity field mapping
missions. In fact, extensive discussion of such mi~sions took place at the :rnGG meeting in lAG
symposium G7, New Concepts in Space Geodesy. The need for such a mission is identified in a
number of papers of the G3 symposium. Let us hope that such a mission is launched in the near
future so that a significant improvement in our knowledge of the static and temporal components of
the Earth's gravitational ijeld can be obtained.
Richard H. Rapp
December 28, 1995
Anny A. Cazenave
VI
R. Steven Nerem
planets where three papers were presented. One of the papers, by Lemoine et al. appearing in this
volume, describes significant new results using Clementine data to determine an expansion of the
Moon's gravitational field to degree 70.
The papers in this volume represent a state of the art in terms of our knowledge of the
gravitational field of the Earth. Current results are exciting in themselves, but one also sees the
strides that can be made in the near future.
One clearly missing link in these papers relates to a discussion on techniques for the improved
determination of the Earth's gravitational field from new dedicated satellite gravity field mapping
missions. In fact, extensive discussion of such mi~sions took place at the :rnGG meeting in lAG
symposium G7, New Concepts in Space Geodesy. The need for such a mission is identified in a
number of papers of the G3 symposium. Let us hope that such a mission is launched in the near
future so that a significant improvement in our knowledge of the static and temporal components of
the Earth's gravitational ijeld can be obtained.
Richard H. Rapp
December 28, 1995
Anny A. Cazenave
VI
R. Steven Nerem