Mls level 3 Products Paul Wagner1, Yibo Jiang1, Christina Vuu2, David Cuddy1

MLS Level 3 Products

• Paul Wagner1, Yibo Jiang1, Christina Vuu2, David Cuddy1

• 1Jet Propulsion Laboratory

• California Institute of Technology

• 2Raytheon Information Solutions – Pasadena Operations

• December 2, 2005

Agenda

• Project Overview

• Aura Data Flow

• MLS Data Flow Diagram

• Level 3 Products

• Data Format
• Swath Data Structure
• Grid Data Structure
• Zonal Means Data Structure
• Metadata File

• Tools and Components

• Conclusion

• Useful Websites

Project Overview

• Salient Features

• One of 4 instruments on the EOS Aura spacecraft

• Launch date: July 15, 2004

• Operational life: 5 years

• Dr. Joe Waters (JPL) Principal Investigator

• Thermal emission from 1 to 100 km altitude in five millimeter and submillimeter wavelength bands

• All measurements are performed simultaneously and continuously, both day and night, and can be made even in the presence of dense cirrus clouds and stratospheric aerosols

Level 3 Data Format

• MLS Level 3 Daily Products:

• Using HDF-EOS5 Swath and Grid formats
• MLS Swaths comply with the Aura Guidelines, v1.7
• 13 daily maps and their metadata files for the following species: ClO, CO, GPH, H2O, HCl, HCN, HNO3, N2O, O3, OH, RHI, IWC, and Temperature

• MLS Level 3 Monthly Products:

• Using HDF-EOS5 Swath, Grid and/or Zonal Means formats
• ‘Standard’ and ‘Diagnostic’ data files for each day of the processed month in Zonal Means format
• Two monthly data files named ‘Standard’ and ‘Diagnostic’ in Zonal Means format
• Two monthly data files named ‘Standard’ and ‘Diagnostic’ in Grid and Swath formats

Level 3 Swath Data Structure (Cont.)

Level 3 Metadata

• MLS Level 3 Metadata file will be created for each data file.

• MLS Level 3 Metadata file contains the following information:

• Local Granule ID
• Production Date and Time
• Local Version ID
• PGE Version
• Reprocessing Planned
• Input Granule
• Short Name
• Beginning and Ending Date and Time
• Group of Measured Parameter contains QA Flags and Statistic
• Group of Orbit Calculated Spatial Domain contains Start and Stop Orbit Numbers, Equator Crossing Date, Time and Longitude
• Group of Horizontal and Vertical Spatial Domain

Tools and Components

• MLS Level 3 currently built with the following:

• Toolkit version 5.2.13
• HDF5 library version 1.6.3
• HDF-EOS5 library version 5.1.9

• MLS Level 3:

• Fortran 95
• Lahey compiler v6.1
• Linux with Red Hat Enterprise v 3.4.4-2

• IDL

• MLS uses version 6.2
• Version 6.1 or later required to read Aura Guidelines-compliant data
• A Level 2 reader available now; a Level 3 reader is promised

Conclusion

• MLS Level 1 and Level 2 products continue to be produced, and archived, having become available to users since February 2005.

• MLS Level 3 is currently under development; its release is planned for August 2006.

• The draft version 2.0 of HDF-EOS Aura Guidelines including the MLS Level 3 Standard was issued on October 30, 2005.