# Presentation: 167382

## Aura Microwave Limb Sounder

- Meeting Fall 2007
**Aura Microwave Limb Sounder**
- David T. Cuddy
- Jet Propulsion Laboratory
- California Institute of Technology

- Pasadena, California
- October 1, 2007

## Outline

- Major Milestones
- Instrument Status
- SIPS Status
- Science Data Products
- Level 2 Processing Status
- MLS Data flow
- MLS Data Products for Version 2
- Current and Future Development
- Aids to Users
- Summary
- Useful Web Pages

- Aura DSWG

- 1 October 2007

## Major Milestones

- Major MLS milestones since launch (15 July 2005)
- Full-up science observations start . . . . . . . . . . . . . . . . . . . . . . . . . .	13 August 2004
- V1.51 (first public release) data processing starts . . . . . . . . . . . . .	28 January 2005
- V1.51 data accessible on GES DISC, starting . . . . . . . . . . . . . . .	15 February 2005
- Released MLS V1.51 Data Quality Documents   . . . . . . . . . . . . . . . 	1 August 2005
- All backlog processing completed for V1.51 . . . . . . . . . . . . . . . . .	25 October 2005
- Aura Science Meeting, The Hague, Netherlands . . . . . . . . . . . . 	8 November 2005
- V1.52 of Level 2 PGE (no Band 13 data) . . . . . . . . . . . . . . . . . . . . . . . 	March 2006
- Achieved Mission Success Criteria . . . . . . . . . . . . . . . . . . . . . . . . .	13 August 2006
- Aura Science Meeting, Boulder, Colorado . . . . . . . . . . . . . .	11-15 September 2006
- Begin production with Version 2.20  . . . . . . . . . . . . . . . . . . . . . . . . .	December 2006
- Update production with Version 2.21 . . . . . . . . . . . . . . . . . . . . . . . . . .	March 2007
- Released MLS V2 Data Quality Document (public release) . . . . . . . . . . . 	May 2007
- Aura Science Meeting, Pasadena, California . . . . . . . . . . . . . . . .	1-5 October 2007

- Aura DSWG

- 1 October 2007

## Instrument Operations

**MLS Instrument continues nominal operations**
- The MLS Instrument Operations Team (IOT) continues to conduct routine and special instrument operational activities from the Instrument Support Terminal at JPL
- Nominal operations includes a monthly Antenna Actuator Assembly lubricant redistribution sweep (AAA reconditioning)
- Nominal instrument mode has all bands active except Band 13 (HCl)
- Only one major problem in the last year that resulted in loss of science measurements:
- Electronics for 640 GHz radiometer shutdown unexpectedly on July 14, 2007
- Returned to nominal operations on August 7, 2007
- The other four radiometers continued to make useful measurements
- Since start of science operations on 13 August 2004, 96% of all possible measurements have resulted in science measurements
- Non-measurement times include routine maintenance, moon in field of view, moon in space view, special calibration scans, HIRDLS pitch maneuvers, Aura drag makeup maneuvers, and instrument anomalies

- Aura DSWG

- 1 October 2007

## Instrument Status

- Aura DSWG

- 1 October 2007

## Science Processing/SIPS

**SIPS continues routine data production**
- SIPS operations
- Although we are funded for 8/5 staffing, SIPS has been very successful in a 24/7 operations – excellent team at Raytheon, Pasadena shared with TES
- Data flow from GES-DAAC has been mostly consistent and timely
- Issues worked via email, phone calls, and biweekly telecons between SIPS and GES-DAAC in a timely manner - GES-DAAC has been very responsive
- Level 1 processing is active with v2.21
- Processing MLS Level 0 data to Level 1 on a daily basis as data arrives
- Retro processing in sync with Level 2
- Level 2 processing is active with v2.21
- Using three clusters to process about 70 days per month
- Level 3 products wait to be validated
- Data delivery to MLS SCF is active
- Data delivery to GES-DISC is active
- Re-design of SIPS file system is under test

- Aura DSWG

- 1 October 2007

## Science Data Products

**Science team inspects all science products and reviews them at the weekly science team meetings**
- Routine archiving of Level 1b and Level 2 products at GES-DISC
- Preliminary Validated (V1.5) products
- Began in February’05 with PGEs v1.51
- Released Data Quality Document in August’05
- data became public
- Stopped production with v1.5 at the end of February’07
- Validated (V2.2) products
- Began production in December 2006 with PGEs v2.20
- Updated PGEs to v2.21 in March’07
- Released Data Quality Document in May’07
- data became public
- Approximately 53% of data processed to Level 2

- Aura DSWG

- 1 October 2007

## Level 2 Processing Status, V2.2

- Aura DSWG

- 1 October 2007

## Data Flow Diagram

- Aura DSWG

- 1 October 2007

## Level 1B and Level 2 Products for Version 2

| Short Name | Geophysical Parameter |  | Short Name | Geophysical Parameter |
| --- | --- | --- | --- | --- |
| ML1RADD  | L1 Radiances from DACS  |  | ML1RADT | L1 Radiances from THz  |
| ML1RADG  | L1 Radiances from GHz  |  | ML1BOA | L1 Orbit and Attitude |
| ML2BRO | L2 Bromine Monoxide  |  | ML2HOCL | L2 Hypochlorous Acid |
| ML2CLO | L2 Chlorine Monoxide  |  | ML2IWC | L2 Ice Water Content |
| ML2CO | L2 Carbon Monoxide  |  | ML2N2O | L2 Nitrous Oxide  |
| ML2CH3CN | L2 Methyl Cyanide  |  | ML2O3 | L2 Ozone |
| ML2GPH | L2 Geopotential Height  |  | ML2OH | L2 Hydroxyl  |
| ML2H2O | L2 Water Vapor  |  | ML2RHI | L2 Relative Humidity w/ ice |
| ML2HCL | L2 Hydrogen Chloride  |  | ML2SO2 | L2 Sulfur Dioxide |
| ML2HCN | L2 Hydrogen Cyanide  |  | ML2T | L2 Temperature |
| ML2HNO3 | L2 Nitric Acid  |  | ML2DGG | L2 Diagnostic, GP Grid |
| ML2HO2 | L2 Hydroperoxy |  | ML2DGM | L2 Diagnostic, Misc. Grid |

- Science Data Products

- Aura DSWG

- 1 October 2007

## Level 3 Products for Version 2

| Short Name | Geophysical Parameter |  | Short Name | Geophysical Parameter |
| --- | --- | --- | --- | --- |
| ML3DZMS | L3 Daily Zonal Mean, Standard |  | ML3DZMD | L3 Daily Zonal Mean, Diagnostics |
| ML3MZMS | L3 Monthly Zonal Mean, Standard |  | ML3MZMD | L3 Monthly Zonal Mean, Diagnostics |
| ML3MMAPS | L3 Monthly Maps, Standard |  | ML3MMAPD  | L3 Monthly Map, Diagnostics |
| ML3CLO | L3 Daily Map, Chlorine Monoxide  |  | ML3IWC | L3 Daily Map, Ice Water Content  |
| ML3CO | L3 Daily Map, Carbon Monoxide  |  | ML3N2O | L3 Daily Map, Nitrous Oxide  |
| ML3GPH | L3 Daily Map, Geopotential Height  |  | ML3DO3 | L3 Daily Map, Ozone |
| ML3H2O | L3 Daily Map, Water Vapor  |  | ML3DOH | L3 Daily Map, Hydroxyl  |
| ML3HCL | L3 Daily Map, Hydrogen Chloride  |  | ML3DRHI | L3 Daily Map, Relative Humidity w/ ice |
| ML3HCN | L3 Daily Map, Hydrogen Cyanide  |  | ML3DT | L3 Daily Map, Temperature |
| ML3HNO3 | L3 Daily Map, Nitric Acid  |  |  |  |

- Science Data Products – continued

- Aura DSWG

- 1 October 2007

## Current and Future Development

**Team busy in three major areas**
- V2.22 PGEs
- To improve throughput performance without changing data quality
- Plan to accomplish this with the use of Intel compiler and code changes
- Currently testing and investigating results
- Near Real Time processing for use in data assimilation
- Developed special purpose algorithm to produce temperature and ozone quickly
- Produced about 3 months of test data
- Plan to set up a processing stream at the SIPS
- GES-DISC to process Level 0 and Aura ephemeris and attitude for near real time processing
- Future work to develop special purpose algorithms for water and geopotential height
- SIPS re-design of file system
- Includes ability to take advantage of remote processor
- Eliminates redundant data store
- Replaces aging hardware

- Aura DSWG

- 1 October 2007

## Aids to Users

- Help is available to user in many ways in addition to those available through GES-DISC
- MLS home page provides useful information and links to others
- http://mls.jpl.nasa.gov/
- MLS provides Data Quality Document
- Available through the main MLS web page
- MLS provides user registration
- Provides updates to instrument and processing status
- Users can ask for help via email: data@mls.jpl.nasa.gov
- MLS provides both IDL and Matlab readers for the Level 2 products through Open Channel Software that distributes software for Caltech/JPL
- http://www.openchannelsoftware.org/projects/Read_MLS_Level_2_Geophysical_P/ - IDL
- http://www.openchannelsoftware.org/projects/Read_MLS_Level_2_Geophysical_2/ - Matlab

- Aura DSWG

- 1 October 2007

## Summary

** **Status Summary
- MLS instrument continues to work well, despite several problems
- MLS data processing systems operating smoothly
- Plans are well underway for Version 2.22 although there are challenges
- Near Real Time data for assimilation is developing
- SIPS improvements will allow better operations
- All Level 1B and Level 2 products routinely archived & available from GES DISC

- Aura DSWG

- 1 October 2007

## Useful Web Pages

- Microwave Limb Sounder home page
- http://mls.jpl.nasa.gov/
- IDL Reader for Level 2 products
- http://www.openchannelsoftware.org/projects/Read_MLS_Level_2_Geophysical_P/
- http://www.openchannelsoftware.org/projects/Read_MLS_Level_2_Geophysical_2/
- Aura Guidelines
- http://www.eos.ucar.edu/hirdls/HDFEOS_Aura_File_Format_Guidelines.pdf
- EOS Data Gateway (EDG)
- http://delenn.gsfc.nasa.gov/~imswww/pub/imswelcome/
- GES DISC Datapool
- http://disc.sci.gsfc.nasa.gov/data/datapool/MLS/
- GES-DISC Interactive Online Visualization and Analysis Infrastructure (Giovanni)
- http://acdisc.sci.gsfc.nasa.gov/Giovanni/mls/

- Aura DSWG

- 1 October 2007