Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

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at the NASA Langley Research Center

MISR Near Real Time Products Available

MISR Near Real Time Products Available

Wednesday, September 3, 2014

The NASA Jet Propulsion Laboratory (JPL) Multi-angle Imaging SpectroRadiometer (MISR) project and the NASA Langley Atmospheric Science Data Center (ASDC) announce the release of new Near Real Time (NRT) versions of the MISR L1B2 Georectified Radiance Product (GRP) containing both Ellipsoid- and Terrain-projected radiance information, and the L2 Cloud Motion Vector (CMV) product containing height-resolved atmospheric winds. These are now available to accommodate rapid response applications, especially numerical weather prediction (NWP).


Each MISR NRT data product is available within three hours of satellite over flight as one data file per session, where a session consists of a 10 to 50 minute observation interval. The file names will include the unique start time of each session, differentiating them from standard MISR product files. The NRT versions of MISR data products employ the same retrieval algorithms as standard production, yielding equivalent science content, though not necessarily equivalent values per retrieval.


The MISR NRT L1B2 data products contain the global mode radiances for an entire session geometrically corrected and projected to a Space-Oblique Mercator (SOM) map grid with a swath width of about 400 km. The Ellipsoid-projected and Terrain-projected top-of-atmosphere (TOA) radiance products provide measurements respectively resampled onto the WGS84 reference ellipsoid and onto the topography of a digital elevation model. Spatial sampling is 275 m in all bands of MISR’s nadir camera, and in the red band of the other eight (off-nadir) cameras. The remaining channels are sampled at 1.1 km spacing.


The MISR CMV wind retrieval product provides a high quality subset of cloud motions representing the wind field, gridded at 17.6 km horizontal resolution.  The geometric height of each cloud motion is simultaneously resolved with 300 m precision. This product is available in HDFEOS and BUFR format. For more information, please consult the MISR CMV DPS and Documentation for the BUFR Format.


The MISR NRT product offerings, beginning from September 1, 2014 are available via the ASDC by subscription, from the Data Pool by FTP access to MISR_NRT, and by order through the online NASA Reverb Earth Science Discovery Tool.


Information about these products and details about product quality will soon be available on the MISR Data and Information Table under "Product Quality Statement".