Voyager IRIS Data Set Overview (“AAREADME” file)

Index

Introduction
“Tape” Contents
File Format
On-Line Analysis and Ordering Capabilities
Whom to Contact for Information
Cognizant Persons
Peer Review

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Introduction

This tape volume contains IRIS full resolution spectra data and associated pointing and geometric information for both the Voyager 1 and Voyager 2 Jupiter encounters. Also included in this volume is calibration information for the IRIS instrument on each spacecraft, PDS catalog information describing the IRIS instrument and Jupiter data set, and PDS labels and record structure information for the data set.

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Tape Contents

This tape contains the following files, created with the VAX/VMS Backup utility as a single save-set. The following directories/files are included:

Directory/Filename                          Description  
-----------------------------     ----------------------------------------
VOLDESC.CAT                       PDS Volume Object description.
AAREADME.TXT                      This file.
  [CATALOG]JUP_DS.CAT             PDS catalog object describing the VGR
                                  IRIS Jupiter data set.
  [CATALOG]VG1_IRIS.CAT           PDS catalog object describing the VGR 1
                                  IRIS instrument.
  [CATALOG]VG2_IRIS.CAT           PDS catalog object describing the VGR 2
                                  IRIS instrument.
  [CALIB]VG1JNESR.DAT             Voyager 1 interferometer noise equivalent
                                  spectral radience data file.
  [CALIB]VG2JNESR.DAT             Voyager 2 interferometer noise equivalent
                                  spectral radience data file.
  [CALIB]VG1PREJT.LBL             PDS label for Voyager 1 target plate
                                  calibration for radiometer pre-Jupiter 
                                  encounter period. 
  [CALIB]VG1PREJT.DAT             Voyager 1 target plate calibration data
                                  for pre-Jupiter encounter period.
  [CALIB]VG2PREJT.LBL             PDS label for Voyager 2 target plate
                                  calibration for radiometer pre-Jupiter 
                                  encounter period. 
  [CALIB]VG2PREJT.DAT             Voyager 2 target plate calibration data
                                  for pre-Jupiter encounter period.
  [CALIB]VG1PSTJT.LBL             PDS label for Voyager 1 target plate
                                  calibration for radiometer post-Jupiter 
                                  encounter period. 
  [CALIB]VG1PSTJT.DAT             Voyager 1 target plate calibration data
                                  for post-Jupiter encounter period.
  [CALIB]VG2PSTJT.LBL             PDS label for Voyager 2 target plate
                                  calibration for radiometer post-Jupiter 
                                  encounter period. 
  [CALIB]VG2PSTJT.DAT             Voyager 2 target plate calibration data
                                  for post-Jupiter encounter period.
  [LABEL]IRISHEDR.FMT             PDS label format file describing header
                                  fields that preceed each IRIS spectral
                                  record.
  [LABEL]IRISTRGP.FMT             PDS label format file describing fields
                                  in target plate calibration data files.
  [DATA]VG1_JUP.LBL               PDS label describing VG1 IRIS Jupiter 
                                  data file and associated NESR file.
  [DATA]VG1_JUP.DAT               VG1 IRIS Jupiter data, approximately 
                                  43 MB. The data are ordered by FDS count.
  [DATA]VG2_JUP.LBL               PDS label describing VG2 IRIS Jupiter 
                                  data file and associated NESR file.
  [DATA]VG2_JUP.DAT               VG2 IRIS Jupiter data, approximately 
                                  55 MB. The data are ordered by FDS count.
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File Format

Most files on this tape have a label encoded in the Object Description Language (ODL) developed by the Planetary Data System (PDS). An ODL label is readable by both humans and computers. It provides a formal description of the format and content of a file. For some files the ODL label appears at the beginning of the file (as is the case for this file). Binary data files provided on this tape are described by detached ODL labels. The detached labels end in a .lbl extension and the associated data file ends in a .dat extension.

PDS label formats and documentation conform to standards as defined by the Planetary Data System Standards Reference (JPL D-7669, Part 2, November 1992, Version 3.0) and the Planetary Science Data Dictionary (JPL D-7116, November 1992, Rev. C) with the following exceptions. Data product labels for the products were approved prior to the release of the Version 3.0 Standards Reference, so do not strictly conform to the Data Product Label standard in Ch. 5 of the PDS Standards Reference, Version 3.0. In particular, the Standard Formatted Data Unit (SFDU) standard from Chapter 17 of the Planetary Data System Data Preparation Workbook - Volume 2, Standards, May 3, 1991, Version 2.0 is used.

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On-line Analysis and Ordering Capabilities

Portions of this data set are available on-line through the Planetary Atmospheres Node Data Analysis (PANDA) system at the PDS Atmospheres node, and a variety of data analysis services are available. In addition, subsets of this data set meeting various user-supplied selection criteria are also available for electronic delivery.

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Whom to Contact for Information

PDS Atmospheres Node Manager

Dr. Steven W. Lee
Laboratory for Atmospheric and Space Physics
University of Colorado
Campus Box 392
Boulder, CO 80309

SPAN: ARIES::LEE Internet: lee@aries.colorado.edu

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Cognizant Persons

IRIS data and calibration information were prepared by Barney Conrath (GSFC), John Pearl (GSFC), and Carolyn Staub (GSFC). Catalog templates were prepared by Barney Conrath and Steve Lee (LASP). Labels and documentation were prepared by Sally Lasater (LASP), Steve Lee (LASP), Randy Davis (LASP) and Sue Hess (JPL).

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Peer Review

This data was peer reviewed under the direction of the PDS Atmospheres Node in April of 1993. The following persons participated in this review:

Chris Barnet
Reta Beebe
Barney Conrath
Luke Dones
Peter Gierasch
Sue Hess
Sally Lasater
Steve Lee
Julio Magalhaes
Glen Orton
John Pearl
Bill Sandel
Mark Showalter
Andrew Weir

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