# Presentation: 005929

## Aura Microwave Limb Sounder

- Meeting Fall 2006
**Aura Microwave Limb Sounder**
- David T. Cuddy
- Jet Propulsion Laboratory
- California Institute of Technology

- Boulder, Colorado
- September 13,2006

## Outline

- Major Milestones
- Instrument Status
- SIPS Status
- Science Data Products
- Level 2 Processing Status
- Testing for Evolution
- Version 2 Development Status
- MLS Data flow
- MLS Data Products for Version 2
- Aids to Users
- Libraries and Compilers
- Performances of PGEs
- Summary
- Useful Web Pages

- Aura DSWG

- 13 September 2006

## 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
- Release 0 of Version 2 PGEs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 	June 2006
- Achieved Mission Success Criteria . . . . . . . . . . . . . . . . . . . . . . . . .	13 August 2006
- Release 1 of Version 2 PGEs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 	August 2006
- Aura Science Meeting, Boulder, Colorado . . . . . . . . . . . . . .	11-15 September 2006
- Release 2 of Version 2 PGEs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	November 2006
- Begin production with Version 2 (planned) . . . . . . . . . . . . . . . . . . .	November 2006
- Release MLS V2 Data Quality Document . . . . . . . . . . . . . . . . . . . .	December 2006

- Aura DSWG

- 13 September 2006

## 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)
- Three major problems have occurred in the last year:
- Band 13 (HCl measurements) shows accelerated degradation and is planned for only monthly measurements (February 2006)
- Entered an unexpected cascading event that shut down some of the instrument (loss of 8 days of measurement – 29 Mar-4 Apr, 2006)
- Bands 10 (ClO) and 29 (HOCl) exhibited anomalous behavior and were shutdown from Apr 18-May 18
- Their behavior shows dependency on temperature variations within the radiometer, that includes orbital variation and Band 13, therefore Band 13 measurements are on hold for the indefinite future
- Since start of science operations on 13 August 2004, 94.6% of all possible measurements have resulted in science measurements
- 28 days with less than 90% good measurements due to planned non-science activities in support of calibration activities, HIRDLS pitch manuevers, and other activities
- 26 days with major outages due to MLS problems

- Aura DSWG

- 13 September 2006

## Instrument Calendar

- Aura DSWG

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## Science Processing/SIPS

**SIPS continues routine data production**
- Running v1.5.2 of SIPS in 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 v1.51 and v2.11
- Processing MLS Level 0 data to Level 1 on a daily basis as data arrives
- Limited data from v2.11
- Level 2 processing is active with v1.51, v1.52, and v2.1
- If Band 13 is active, also process with v1.51
- Limited data from v2.1
- Level 3 processing will become active with V2.2
- Data delivery to SCF is active
- Data delivery to GES-DISC is active
- Producing copies of critical subset of the data on DVD for SCF
- Stopped sending data to University of Edinburgh (co-PI) at their request

- Aura DSWG

- 13 September 2006

## 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
- Began in February’05 with PGEs v1.51
- Quality Document released August’05 and data became public
- All but 5 days processed to Level 1b since beginning of science operations
- All but 33 days processed to Level 2 since beginning of science operations
- 29 days processed by both V1.51 and V1.52 to Level 2
- V1.52 was necessary to process data without Band 13
- Because of institutional and location convenience, MLS shares its data holdings with TES scientists at JPL
- Does not use GRID technology (poster by Brian Knosp in session 2)

- Aura DSWG

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## Level 2 Processing Status

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## Testing for Evolution

- MLS SCF and SIPS continue to support testing for *Evolution*
- Mini-MOSS for GEOS-5 data flow from GOLDS tested 8x data flow to SIPS and SCF – no issues
- Concern with data volume especially during the retro-processing period
- Providing support of informal tests for
- EDS (Level 0) from GES-DISC to SCF
- PDS (Level 0) from GES-DISC to SIPS
- Level 1 from SIPS to GES-DISC
- Level 2 from SIPS to GES-DISC
- Future:
- Level 3 from SIPS to GES-DISC

- Aura DSWG

- 13 September 2006

## Version 2

- Status of progress on Version 2 of PGEs
- Features of Version 2
- Level 1b and Level 2 products will be improved from V1.5
- Add Level 3 products in this release
- Plan to add two new data types at Level 2
- CH3CN (Methyl Cyanide)
- SO2 (Sulfur Dioxide) – already have the data types, but no products
- Increment ESDT version (=2) for all data sets
- Use *h5repack* to optimize output products
- Compression is set to GZIP = 1
- Release 0 (V2.0) was dress rehearsal – Jun’06
- Release 1 (V2.1) is preliminary release – Aug’06
- Limited set of products available at AVDC
- Uses GEOS-4 as input
- Release 2 (V2.2) is the final release – Nov’06
- Products will be the basis for the validation papers due in Mar’07
- GEOS-5 is a required input; GEOS-4 is not a valid input

- Aura DSWG

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## Data Flow Diagram

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## 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

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## 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

- 13 September 2006

## 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/
- See poster by Brian Knosp
- 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 an IDL reader 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/
- Level 3 readers will be coming soon

- Aura DSWG

- 13 September 2006

## Libraries and Compilers

- Library versions in used by MLS V1.5
- HDF4:	4.2r0
- HDF5:	1.6.2
- Toolkit:	5.2.12
- HDF-EOS 	2.12
- HDF-EOS5	5.1.8
- Library versions in used by MLS V2.1
- HDF4	4.2r1(a)
- HDF5 	1.6.5-post5
- Toolkit 	5.2.14
- HDF-EOS 	2.14
- HDF-EOS5	5.1.10
- Our compilers:
- gcc 	3.4.6
- NAG 	f95 5.0
- Lahey 	lf95 6.10e

- Aura DSWG

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## Performance of PGEs

- Performance of PGEs is within limits of resources
- Level 1:
- V1.51 requires less than 6 CPU hours for each data day
- V2.x will require less than 6 CPU hours for each data data
- Level 2
- V1.51 requires about 7000 CPU hours for each data day
- V1.52 requires about 5900 CPU hours for each data day
- V2.1 requires about 11,200 CPU hours for each data day
- Hope to lower this with V2.2
- Use of queue management will use most of available CPU hours
- Each cluster will provide a maximum of 8736 CPU hours
- 3 clusters available, each running 364x3.06 GHz Pentium Xeon processors
- Timeliness attained by dividing a day of data into 350 chunks and running the chunks in parallel on 350 processors
- Level 3
- V2.x Daily Map will require less than 6 CPU hours for each 10 day run
- V2.x Monthly run will require less than 6 CPU hours

- Aura DSWG

- 13 September 2006

## 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 although there are challenges
- All Level 1B and Level 2 products routinely archived & available from GES DISC

- Aura DSWG

- 13 September 2006

## 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/
- 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 Web-based Hierarchical Ordering Mechanism (WHOM)
- http://disc.gsfc.nasa.gov/data/dataset/MLS/
- GES DISC Datapool
- http://disc.gsfc.nasa.gov/data/datapool/MLS/
- GES-DISC Interactive Online Visualization and Analysis Infrastructure (Giovanni)
- http://reason.gsfc.nasa.gov/Giovanni_mls3d/

- Aura DSWG

- 13 September 2006