Follow this link to skip to the main content
spacer spacer spacer
spacer spacer spacer
spacer
NASA Logo - Jet Propulsion Laboratory    + View the NASA Portal Google

WWW JPL MLS
JPL Home Earth Solar System Stars & Galaxies Technology
MLS Banner
blank navigation bar
spacer
spacer spacer spacer
spacer
HOME
WHAT'S NEW
EOS Aura MLS
UARS MLS
RESEARCH
PUBLICATIONS
PERSONNEL
CONCEPTS

"What's new" Archive: 2008




  • 08 May 2008: MLS v2.2 reprocessing complete
    Contact: Nathaniel Livesey

    As of 02 May 2008, version 2.2 reprocessing of all Aura Microwave Limb Sounder (MLS) data has completed. This reprocessing has covers the period from the July 2004 Aura launch to the present date. v2.2 data should be used in preference to the earlier v1.5 data.

    For more information on MLS v2.2 data, and on improvements over the earlier v1.5, please refer to the MLS 'Version 2.2 Level 2 Data Quality Document' available from the MLS data page, under the 'Data Documentation' link. Dedicated validation papers for the individual products have also been published in the Aura validation special issue of JGR- Atmospheres, and reprints are available from the MLS publications page.

    MLS data can be downloaded from the GSFC-DISC (http://disc.gsfc.nasa.gov, or follow the 'Order MLS Data' link on the MLS home page). If you have any questions about MLS data, please contact the MLS science team member(s) responsible for the products of interest, as detailed in the data quality document.




  • 13 April 2008: MLS data algorithm update
    Contact: Nathaniel Livesey

    The MLS data processing algorithms have recently been updated to version v02.23. The only changes between v02.22 and v02.23 are modifications to the level 1 (radiance calibration) software to handle two separate issues. The first modification is in response to a change in operation of the MLS THz laser local oscillator on January 28, 2008, which resulted in a dramatic reduction in the number of useful level 2 (geophysical product data) OHprofiles in v02.22 (because of data quality control screening that was too conservative). When (re)processed with v02.23 algorithms, these days will have the typical (~90%) fraction of useful profiles for OH. The second modification is better handling of occasional (0.001%) corrupted instrument data packets arising from an ongoing anomaly with the Aura spacecraft data handling system commencing on December 4, 2007. The impact of this change on level 2 data is minimal. There is no need to reprocess data prior to December 2007 unaffected by either issue, and - for simplicity - the few remaining (2004) days still to be reprocessed to v02.2x are being run using v02.22.




  • 12 February 2008: Aura Spacecraft FMU Anomaly Dates
    Contact: David Cuddy

    In December 2007, the Aura Spacecraft experienced anomalies with its FMU. These anomalies effected the output of spacecraft attitude data used in standard MLS processing. The attitude data has been re-processed using S-Band data as its source and below is a table of times and dates for which we received this updated attitude data. Users of Level 2 data should see no effect.

    Hour
    year DOY Dec 00 02 04 06 08 10 12 14 16 18 20 22
    2007 338 4                   x x x
    339 5 x x x x x x x x x x x x
    340 6 x x x x x x x x x x x x
    341 7 x x x x x x x x x x x x
    342 8 x x x x   x x x x x x x
    343 9 x x x x x x x x x x x x
    344 10 x x x x x x x x x x x  
    345 11         x x x x x x x x
    346 12 x x x x x x x x x x x x
    347 13 x x x x x x x x x x x x
    348 14 x x x x x             x
    349 15 x x x     x   x        
    350 16   x x   x   x x     x x
    351 17 x x x x     x          
    352 18     x   x     x x x   x

spacer
spacer blank navigation bara link to copyright and privacy informationblank navigation barLink to internal MLS team pages
spacer
FIRST GOV + Freedom of Information Act
NASA Home Page

Site Manager: Nathaniel Livesey
Webmaster: Brian Knosp

spacer spacer spacer
spacer spacer spacer
JPLNASACal Tech SO2 Product PageO3 Product PageH2O Product PageIWC Product PageGPH Product PageTemperature Product Page CO ProductO3 Product Page HOCl Product PageSO2 Product PageBrO Product PageClO Product PageHCl Product PageHNO3 Product PageN2O Product PageCH3CN Product PageHCN Product PageCO ProductO3 Product PageHO2 Product PageOH Product PageH2O Product PageIWC Product PageGPH Product PageTemperature Product Page SO2 Product PageBrO Product PageClO Product PageHOCl Product PageHCl Product PageHNO3 Product PageN2O Product PageHCN Product PageCO ProductO3 Product PageHO2 Product PageOH Product PageH2O Product PageIWC Product PageGPH Product PageTemperature Product PageCH3CN Product Page