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aareadme.txt 15-May-2002 05:39 11K
voldesc.cat 25-Jun-2002 10:18 3.4K [PDS catalog file]
PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
SPACECRAFT_NAME = NEAR
OBJECT = TEXT
PUBLICATION_DATE = 2001-09-22
NOTE = "AAREADME: describes data from Mathilde flyby, Eros
flyby and orbit phases, plus gravity/shape models. "
END_OBJECT = TEXT
END
NEAR Mission RADIO SCIENCE (RSS) Data Set
========================================================================
Introduction
============
This document provides an overview of this volume of this Near Earth
Asteroid Rendezvous (NEAR) Radio Science Data Set, including a gravity
model with landmarks file; an NLR shape/gravity model is included for
comparison. The NEAR Science Data Center (SDC) archives NEAR science
data to the Small Bodies Node (SBN) of the Planetary Data System (PDS),
as specified in the NEAR Project Archive Generation, Validation and
Transfer Plan (February 1998).
NEAR data sets contain data from only one instrument and one mission phase.
Mission phases for data sets are defined in the table below. Each data
set contains the data from a range of days and all supporting directories.
The data sets may span multiple volumes. The GEOMETRY data containing the
SPICE ephemerides, attitude and other files are delivered in a separate
data set.
This data set is a part of the NEAR final archive delivery as
described by the NEAR PDS Data Archive Plan. The Plan also describes the
higher level data products, which will become separate PDS data sets.
Volume Format
=============
This volume has been formatted according to the ISO-9660 level 2
Interchange Standard.
This volume does not contain any Extended Attribute Records (XAR).
Thus, some VAX/VMS users may have problems accessing files on this
volume.
File Formats
============
All text documents and other meta information files such as
descriptions, PDS object definitions and detached PDS labels have a
carriage return (ASCII 13) and a line feed character (ASCII 10) at the end
of the record. This allows the files to be read by MS-DOS/Windows, Unix,
and VMS operating systems.
Volume Contents
===============
Files on this volume are organized into a set of subdirectories
below the top-level directory. The following table shows the
structure of these directories. See the *INFO.TXT files in each directory
for specific information on the files in the directory.
Volume directory structure:
|-AAREADME.TXT The text version of the AAREADME file.
|-ERRATA.TXT Text information describing data errors/anomalies.
|-VOLDESC.CAT Description of the contents of this volume.
|-CATALOG--
|-EROSFB --
|-EROSORB -
|-EROSGRAV-
|-EROSHAPE-
|-MATHFB --
|-DOCUMENT
|-DOCUMENT-GRAVITY
|-GEOMETRY-
|-INDEX---
Description
-----------------------------
CATALOG Templates for the mission, instrument host, instrument,
and data set.
DATA The radio data is provided in raw and derived versions.
The data is organized by mission phase.
(EROSFB,EROSORB,EROSGRAV,EROSHAPE,MATHFB)
DOCUMENT Instrument document and solution for gravity field manuscript.
GEOMETRY This directory contains only a GEOMINFO.TXT file.
A separate GEOMETRY volume contains all of the SPICE kernels in
text transfer format for the mission phase and the supporting
documentation.
INDEX INDEX TABLES for this CD and the volume set describing times and
key data file parameter values.
Mission Phase Parameters
-------------------------------------------------------
1) Phase Name
2) Segment(Phase Abbrv)
3) Start Year, DayOf Year
4) End Year, DayOf Year,
5) Length(days)
-------------------------------------------------------
CRUISE1 CRU1 1996051 1997175 491
MATHILDE MATH 1997176 1997178 3
CRUISE2 CRU2 1997179 1998022 209
EARTH ERTH 1998023 1998026 4
CRUISE3 CRU3 1998027 1998356 330
EROS/FLYBY ERFB 1998357 1998357 1
CRUISE4 CRU4 1998358 2000010 383
EROS/ORBIT EROS 2000011 2001043 399
EROS/SURFACE ERSF 2001044 2001059 16
-------------------------------------------------------
Dr Ed Grayzeck
Archive Manager
Small Bodies Node of PDS
Department of Astronomy
University of Maryland
College Park, MD
20742-2421
301-405-1539
grayzeck@astro.umd.edu