en-us News from the NASA GES DISC. http://disc.sci.gsfc.nasa.gov/ The Simple, Scalable, Script-Based, Science Processor for Measurements (S4PM) version 5.26.0 is now available to the open source community from SourceForge. Click the link to view the release notes. http://disc.sci.gsfc.nasa.gov/techlab/s4pm/S4PM5.26.0ReleaseNotes.shtml 2008-04-28 To address the AMSU-A channel 4 noise problem, the AIRS science team delivered a new processing algorithm V5.2. It applies to AIRS+AMSU-A Level-2 (AIRX2*) and Level-3 (AIRX3*) products. Previous to October 1,2007 they will remain as V5.0. Beginning October 1, 2007, the products will be V5.2. http://disc.sci.gsfc.nasa.gov/AIRS/documentation/notices/Notice_20080229.shtml 2008-04-24 Dr. Suhung Shen of the GES DISC is the lead author of a paper published in the IEEE journal - Geoscience and Remote Sensing Letters. The paper is entitled: Seasonal Variations of Chlorophyll a Concentration in the Northern South China Sea. http://disc.sci.gsfc.nasa.gov/oceancolor/locus/scs_paper.shtml 2008-04-24 Several GES DISC staff will participate in the NASA CC&E meeting April 28 - May 2 in College Park, MD: Z. Liu, A. Chen, and S. Shen will present posters; J. Acker will co-chair a breakout session; and G. Leptoukh, S. Lloyd, and W. Teng will also attend. http://disc.sci.gsfc.nasa.gov/news/carbon_cycle_ecosystems_posters.shtml 2008-04-24 Global monthly averaged 0.25 degree Noah products from the Global Land Data Assimilation System (GLDAS) are now available from the Hydrology DISC (HDISC). http://disc.gsfc.nasa.gov/hydrology/hsbdisc_news.shtml 2008-04-16 The Hurricane Data Analysis Tool (formerly TRMM QuikSCAT Analysis) has now incorporated NCEP Reanalysis data. Users can now generate on-the-fly visualizations for hurricane events and overlay some of the following parameters: sea level pressure, sea surface temperature, winds and precipitation. http://disc.sci.gsfc.nasa.gov/hurricane/trmm_quikscat_analysis.shtml 2008-03-13 This release focuses on usability issues, as well as the following: new instance for TRMM data, new version 3 OMI products, new MapServer enhancements for gridded products, improved Web Mapping Service (WMS) functionality, enhancements to KML file outputs, and improved error handling. http://disc.gsfc.nasa.gov/techlab/giovanni/Giovanni3.0.6ReleaseNotes.shtml 2008-03-11 The Simple, Scalable, Script-Based, Science Processor for Measurements (S4PM) version 5.25.0 is now available to the open source community from SourceForge. Click the link to view the release notes. http://disc.sci.gsfc.nasa.gov/techlab/s4pm/S4PM5.25.0ReleaseNotes.shtml 2008-02-26 The Global Land Data Assimilation System (GLDAS) products are now provided to the GrADS Data Server (GDS) users. GDS users can access the data, perform subsetting and analysis operations without first downloading them. http://disc.gsfc.nasa.gov/hydrology/hsbdisc_news.shtml 2008-02-20 In accordance with the decision to reconfigure the A-Train formation, the re-phasing of the Aura satellite is progressing as planned. The immediate substantial effect of this maneuver is that the footprint of the MLS retrieved column drifts away from the MODIS/Aqua nadir. http://disc.sci.gsfc.nasa.gov/atdd/rssnews/MLS-MODISseparation.shtml 2008-02-12 HIRDLS Level 2 data can now be subsetted by parameter and spatial region. The subset tool is available on-line as a web service, and the subsetted data can be downloaded to your machine. Subset capability is also available for OMI and MLS level 2 data. http://disc.sci.gsfc.nasa.gov/data/datapool/ 2008-01-24 User's can now create wind speed plots, along with wind vectors, using the TRMM-QuikSCAT analysis tool! http://disc.sci.gsfc.nasa.gov/hurricane/trmm_quikscat_analysis.shtml 2008-01-08 The Aura spacecraft has experienced an anomaly causing some housekeeping data not to be transmitted. As a result, Aura Level 1 and 2 data from Dec. 8, 2007 have not been processed. A temporary workaround is currently being implemented. The earliest resumption of data processing is expected to take place by mid-January. Please check back for any updates to this situation. /news/detailed_story.html?ii=224 2007-12-21 AMSU-A Channel 4 NeDT continues to degrade, reaching 3K by the beginning of December, 2007. The condition is now significantly impacting the yield of the operational version 5 AMSU+AIRS retrieval products. Please the the PDF file for full text. [ALso see 2007-10-30 posting] http://disc.sci.gsfc.nasa.gov/AIRS/documentation/notices/AMSU-A_Channel_4_NeDT_Update_2007-12-20.pdf 2007-12-21 Early this past Sunday (December 2, 2007; Day 336), circumstances both onboard the spacecraft and at the EOS Operations Center led to corruption of the memory partition that holds the ground-based attitude determination (GBAD) data in the Aqua spacecraft's solid state recorder (SSR). GBAD data is the primary input used in producing PM1ATTNR. About 19 hours of GBAD data were permanently lost because nothing was written to that partition for most of Sunday.##:####:##Since late Sunday, GBAD data have been being recorded on the SSR and downlinked as usual, but the data has format problems which have prevented it from being processed at EDOS, and hence GES DISC has been unable to process PM1ATTNR.##:####:##The Earth Science Mission Operations (ESMO) Project at GSFC is working with Northrop-Grumman (the builders of the spacecraft) to correct the problem. Possible solutions are being discussed. Unfortunately, all options involve new procedures which will have to be developed and thoroughly tested. In the meantime, EDOS is working on a way to process the GBAD data that is coming down now, so that normal science data processing can resume while the SSR problem is being worked.##:####:##We recently received a set of GBAD data produced with one of those solutions; however, it's validity has yet to be established.##:####:##The ESMO Project is also investigating the possibility of reconstructing the lost GBAD data using other spacecraft telemetry and help from the Flight Dynamics Facility.##:####:##GES DISC continues AIRS NRT processing (Level-1B only) without the GBAD data for the time being. /news/detailed_story.html?ii=222 2007-12-07 An article on the NASA NEESPI Data and Services Center has been published online in Environmental Research Letters, and is available at http://stacks.iop.org/1748-9326/2/045009. The publication will appear in Environ. Res. Lett. 2 (2007) 045009 /news/detailed_story.html?ii=223 2007-12-04 The ESMO project informs that the A-Train Principals consider a plan to decrease the Aura satellite’s along track separation from Aqua and the other A-Train missions. http://disc.sci.gsfc.nasa.gov/atdd/news/A-TrainReconfiguration.shtml 2007-11-30 The CALIPSO and CloudSat projects inform about CALIPSO pitch angle change (from 0.3 degrees to 3.0 degrees) http://disc.sci.gsfc.nasa.gov/atdd/news/A-TrainReconfiguration.shtml#CALIPSO_reconfig 2007-11-30 Going to AGU this month? Visit our poster session on HDISC support for GLDAS products and check out the range of GLDAS parameters. http://disc.gsfc.nasa.gov/hydrology/images/Fang2007_AGU_post.jpg 2007-11-30 The GES DISC Interdisciplinary Portal has been decommissioned and is no longer available. Relevant data sets and content will be available elsewhere on our Website. http://disc.sci.gsfc.nasa.gov/news/112907_byeinterdisc.shtml 2007-11-29 The version 3 of level 2 HIRDLS Product 'HIRDLS2 version 2.04.09)' is now available. At this time, Temperature, O3, HNO3 and Cloud top pressure are only available. For more information please see the link below. http://disc.gsfc.nasa.gov/Aura/HIRDLS/hirdls2_v003.shtml 2007-11-20 The GES DISC will participate in the AGU Fall 2007 Meeting in San Francisco, December 10-14, including 17 papers highlighting recent developments in the Hydrology, AIRS, Giovanni, and Hurricane portals, as well as the A-Train Data Depot, Atmospheric Composition DISC, and other projects. http://disc.sci.gsfc.nasa.gov/conferences/agu_2007.shtml 2007-11-13 The radiometric noise, NeDT, in AMSU channel 4 has recently increased significantly. At launch it was 0.12 K. Beginning in late September 2007, the rate of increase accelerated so that by the end of October the NeDT is near 1 K... http://disc.sci.gsfc.nasa.gov/AIRS/amsu_ch4_noise_increase.shtml 2007-10-30 NRT data products are currently available for Level-1B and Level-2, and are specially useful for users whose primary interest is the low latency. http://disc.sci.gsfc.nasa.gov/AIRS/documentation/notices/Notice.NRTrelease.shtml 2007-10-26 The version 3 OMI Level 1B Radiance Products 'OML1BRUG', 'OML1BRUZ', 'OML1BRVG', 'OML1BRVZ' and 'OML1BIRR' are now available. For more information about these data products please see the link below. http://daac.gsfc.nasa.gov/Aura/OMI/index.shtml 2007-10-17