--Michael Goodman (michael.goodman@msfc.nasa.gov), Earth System Science Division, NASA Marshall Space Flight Center, Global Hydrology and Climate Center
The NASA Marshall Distributed Active Archive Center (DAAC) will be closing on March 31, 1997. This action is a result of NASA's reduced budget and the subsequent reallocation of resources within the rebaselined Mission to Planet Earth program. The data previously archived here will continue to be accessible at other EOSDIS DAACs, NOAA/NESDIS, the Lightning Imaging Sensor Science Computing Facility (LIS SCF), and the Global Hydrology Resource Center (GHRC), which is collocated with the Global Hydrology and Climate Center. A listing of these data sets with their current data center locations may be found at http://wwwdaac.msfc.nasa.gov (see data transition sub page). Note that the LIS SCF will also be the distributor of the TRMM LIS data products to be produced after the TRMM launch. All data sets will be accessible through EOSDIS, since all data providers are interoperable with EOSDIS.
Many users of the Marshall DAAC have received Defense Meteorological Satellite Program (DMSP) SSM/I, SSM/T1 and SSM/T2 data sets. After the closing of the Marshall DAAC, all the DMSP data sets named above may be obtained from either the NOAA Satellite Active Archive (http://www.saa.noaa.gov) or from the NOAA National Climatic Data Center (http://www.ncdc.noaa.gov). Thus the bottom line is that no data will be lost and access to all data sets will be continued.
The GHRC is the new name for the data and information system supporting the research activities within the Global Hydrology and Climate Center. The GHRC supports product generation, archiving, and distribution of research quality and operational data sets. The GHRC provides access to the Lightning Imaging Sensor data sets. The LIS SCF serves as the data production, archive, and distribution system for lightning data collected by the EOS lightning sensors (LIS and the Optical Transient Detector). Airborne and ground-based lightning calibration & validation data sets, as well as composite radar reflectivities and SSM/I brightness temperatures (used by the LIS science team for convective storm identification and for algorithm development and validation) will continue to be available for distribution from the LIS SCF through the GHRC.
The GHRC processes a variety of passive microwave data sets producing global tropospheric and stratospheric temperatures derived from the Microwave Sounding Unit, and global tropospheric water vapor derived from the Special Sensor Microwave Temperature Sounder (SSM/T2). In addition, aircraft passive microwave data collected during field experiments using the Advanced Microwave Precipitation Radiometer (AMPR) are available. These data sets currently reside with the Marshall DAAC but will be handed over to the GHRC in April 1997. You may search and order these data sets via the EOSDIS Version 0 IMS web page at http://harp.gsfc.nasa.gov/v0ims/. A future letter will provide you with more information about the GHRC. In the meantime you may learn more about the Global Hydrology and Climate Center and its research activities through our home page (http://wwwghcc.msfc.nasa.gov).
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