Thermal Emission Imaging System

2001 Mars Odyssey

THEMIS GEOMETRIC PROCESSING

USER’S GUIDE

January 1, 2006

Thermal Emission Imaging System

2001 Mars Odyssey

THEMIS GEOMETRIC PROCESSING

USER’S GUIDE

Prepared by:

Kimberly C. Murray Date

THEMIS Data Archivist

Approved by:

Philip R. Christensen Date

THEMIS Principal Investigator

Greg L. Mehall Date

THEMIS Instrument Manager

Noel S. Gorelick Date

THEMIS Principal Systems Programmer

R. Stephen Saunders Date

Mars Odyssey Project Scientist

Betty J. Sword Date

PDS Mars Data Engineer

January 1, 2005

DOCUMENT CHANGE LOG

Date	Description	Sections affected
01/01/06	Initial draft	All

CONTENTS

DOCUMENT CHANGE LOG....................................................................................................... III

CONTENTS.................................................................................................................................. IV

ACRONYMS.................................................................................................................................. V

1. INTRODUCTION....................................................................................................................... 1

1.1 Purpose and Contents............................................................................................................. 1

1.2 ISIS Overview........................................................................................................................ 1

1.2.1 Software and Product Overview....................................................................................... 1

1.2.2 THEMIS Specific Software Overview.............................................................................. 2

1.3 THEMIS Overview................................................................................................................. 2

1.3.1 Instrument Overview........................................................................................................ 2

1.3.2 Data Products Overview.................................................................................................. 3

2. gEOMETRIC pROCESSING..................................................................................................... 4

2.1 Infrared RDR Projection.......................................................................................................... 4

2.2 Visible RDR Projection........................................................................................................... 4

2.2.1 THM2ISIS...................................................................................................................... 4

2.2.2 THMVISMC................................................................................................................... 4

2.2.3 Additional Processing....................................................................................................... 5

3. GEOMETRIC Product Specifications........................................................................... 6

3.1 Geometry Product Naming and Identification........................................................................... 6

3.2 Standards Used in Generating Geometry Products................................................................... 6

3.2.1 PDS Standards & Data Processing Level.......................................................................... 6

3.2.2 Time Standards................................................................................................................ 7

3.2.3 Coordinate Systems......................................................................................................... 7

3.3 GEO Image Format................................................................................................................. 7

3.3.1 ISIS CUBE Data Object.................................................................................................. 7

3.3.2 ISIS CUBE Label Object................................................................................................. 9

3.4 GEO Label Format................................................................................................................. 9

3.4.1 File Identification and Structure Label............................................................................... 9

3.4.2 QUBE Object Label...................................................................................................... 10

3.4.3 HISTORY Object.......................................................................................................... 10

3.5 Data Product Archive............................................................................................................ 10

4. Applicable Software...................................................................................................... 10

A. Appendicies......................................................................................................................... 11

A.1 Example Label: IR-GEO....................................................................................................... 11

A.2 Example Label: VIS-GEO.................................................................................................... 11

A.3 Label Keyword Descriptions................................................................................................ 14

A.4 HISTORY Object Items and Examples................................................................................. 19

A.5 Geometry Indexes................................................................................................................ 22

ACRONYMS

ASU	Arizona State University
EDR	Experiment Data Record
GEO	Geometrically registered record
IR	Infrared
ISIS	Integrated Software for Imaging Spectrometers
JPL	Jet Propulsion Laboratory
NAIF	Navigation and Ancillary Information Facility
NASA	National Aeronautics and Space Administration
PDS	Planetary Data System
RDR	Reduced Data Record
ODY	2001 Mars Odyssey
SIS	Software Interface Specification
SPICE	Spacecraft, Planet, Instrument, Camera-matrix, Events
THEMIS	THermal EMission Imaging System
VIS	Visible

1. INTRODUCTION

1.1 Purpose and Contents

The purpose of this document is to provide scientists using the Thermal Emission Imaging System (THEMIS) Visible and Infrared special geometry products with enough information to enable them to read and understand the data products. Topics discussed in this document include an introduction to the ISIS software used to geometrically project the images, a description of the processing algorithm used to generate the images, a description of the data product format, and the contents of available ancillary labels and files.

THEMIS geometry products (IR-GEO and VIS-GEO) are spatially registered, spectral image CUBEs derived from the THEMIS calibrated radiance products (IR-RDR and VIS-RDR). Each image file is accompanied by a detached ASCII label describing the data format, contents, and processing history.

For additional information, the user is referred to the following documents available in the THEMIS archive, unless otherwise noted:

1. Calibration Report for the Thermal Emission Imaging System (THEMIS) for the 2001 Mars Odyssey Mission, P.R. Christensen.

2. Mars Odyssey THEMIS: Archive SIS.

3. Mars Odyssey THEMIS: Data Processing User’s Guide, P.R. Christensen.

4. Mars Odyssey THEMIS Geometry Processing with ISIS, J. Torson, internet documentation: http://isis.astrogeology.usgs.gov/Isis2/isis-bin/themis-processing.cgi.

5. Mars Odyssey THEMIS: Standard Data Products SIS.