Chapter 1:  INTRODUCTION TO THE REVISED EDITION

This document was originally published by the NIMS team in December 1990 as a
guide to the first Galileo Earth-Moon encounter (E1) and to the Venus data
playback which preceded it.  It has been revised and corrected for inclusion on
the first CD-ROM of NIMS Experiment Data Records (EDRs).  Some material in the
original document has been omitted since it is available elsewhere on the CD.
Other material of only historical interest has been relegated to an appendix. 

The aim of the revised guide is to provide detailed information on the
various NIMS observations and calibrations.  Also included is background
information on the encounters.  An overview of the guide is given below.
Please refer to the beginning of each chapter for a detailed list of contents.

Chapter 2 gives spacecraft cruise overviews for the three principal subsets
of data included on the CD-ROM.  Chapters 3, 4 and 5 contain comprehensive
information on the NIMS science observations during EV6 (the Venus encounter),
VE9 (the pre-Earth-encounter calibrations) and VE11 (the first Earth/Moon
encounter) respectively.  These chapters include detailed timelines, science
observation descriptions and objectives, as well as Pointer plots (observation
footprints).  Chapter 5 also includes a spreadsheet presentation of all the
observations in the E1 encounter.  New in this edition of the guide are
detailed Observation Catalogs (OBSCATs), tables containing spacecraft clock
ranges, instrument modes and parameters for each observation described in the
chapter.

For information on the NIMS instrument, please see the preprint of the NIMS
instrument paper provided elsewhere on the CD-ROM, or refer to the published
version:  R. W. Carlson, P. R. Weissman, W. D. Smythe, J. C. Mahoney, and the
NIMS Science and Engineering Teams, "Near-infrared Mapping Spectrometer
Experiment on Galileo", Space Science Reviews 60: 457-502, 1992.


ACKNOWLEDGMENTS

The NIMS observations described in this Guide were designed by Kevin Baines
(Venus and Earth), Adriana Ocampo (Moon) and Bill Smythe (Calibrations).
Adriana Ocampo edited the original printed document.  Marcia Segura
subsequently retrieved most of the original material for the CD-ROM.
Frank Leader edited the original Postscript files for consistency and
clarity, and recovered missing material by scanning parts of the original
printed document.  Bob Mehlman rewrote the introduction.