visst: Minnis Cloud Products Using Visst Algorithm
General Data DescriptionThese data streams contain satellite based retrievals of cloud and radiation properties by Pat Minnis' group at NASA/Langley using the VISST (Visible Infrared Solar-Infrared Split Window Technique) algorithm. The data streams are both pixel-level (4-km) retrievals and gridded area averages on a 0.3 or 0.5 degree latitude-longitude grid.
These data streams replace earlier satellite based retrievals that were based on the Layered Bispectral Threshold Method (LBTM).
The group at NASA/Langley produces additional products, which can be found on their website, NASA/Langley Cloud and Radiation Research (Minnis Group) Home Page
Measurement DescriptionNASA-Langley cloud and radiation products are produced using the VISST (Visible Infrared Solar-infrared Split-Window Technique), SIST (Solar-infrared Infrared Split-Window Technique) and SINT (Solar-infrared Infrared Near-Infrared Technique). The technique uses satellite (e.g. GOES, MTSAT, AVHRR) channels to detect clouds and retrieve cloud microphysics. Parameters derived include cloud phase, optical depth, particle size, liquid/ice water path, height, temperature, and others.
A description of the algorithm was presented at the 2002 ARM Science Team Meeting (see Citable References).
Temporal CoverageAs of 2015-04-06:
- VISST-derived gridded and pixel-level products from satellite GOES8: 1998-05/2003-03
VISST-derived gridded and pixel-level products from satellite GOES10: 2003-04/2006-06
VISST-derived gridded and pixel-level products from satellite GOES11: 2006-06/2011-11.
VISST-derived gridded and pixel-level products from satellite GOES13: 2011-12/2012-09-23 and 20130101-present
VISST-derived gridded and pixel-level products from satellite GOES15: 2012-09-24-20121231.
- VISST-derived gridded and pixel-level products from satellite MTSAT covering Darwin, Manus and Nauru: 2006-01/02. 2007-10/12, 2008-01/04
VISST-derived gridded products from satellite MTSAT covering the entire TWP domain: 2007-10/12. 20080101-20080430
VISST-derived gridded and pixel-level products from satellite GOES9 covering Darwin, Manus and Nauru: 2003-05/2005-10
VISST-derived gridded products from satellite GOES9 covering the entire TWP domain: 2003-05 - 200501-10
- M/PACE: 2004-09-27/2004-10-24, Please visit MPACE Field Campaign data archive
Planned extension to full year from 2004-03 to 2005-02 for BBHRP validation needs.
Area CoveredThe areas covered are:
- 32N-42N, 91W-105W
- Darwin: 5S-17S, 125E-136E
Manus: 1.5S-2.5S, 147E-148E
Nauru: 0-1S, 166.5E-167.5E
Entire TWP Domain: 10N-20S,120E-180
- 64N-74N, 140W-165W
Data Stream Inputsnone
Notification Form LinkVISST Notification Form
Related LinksNASA/Langley Cloud and Radiation Research (Minnis Group) Home Page
Satellite Imagery and Cloud Products produced by Minnis Group
TranslatorLawrence Livermore National Laboratory
externalScience Systems and Applications, Inc. (SSAI)
associateBrookhaven National Laboratory
Brookhaven National Laboratory
InstitutionNASA/Langley Cloud and Radiation Research (Minnis Group)
- Initial release of new netCDF file generation procedure.
- The two datastreams(sgpvisstgridg11v3minnisX1.c1 and sgpvisstpx04g11v3minnisX1.c1) from 200606-201105 have been reprocessed to reflect the changes of new narrowband-to-broadband TOA flux conversion.
- The two new datastreams(sgpvisstgridg11v4minnisX1.c1 and sgpvisstpx04g11v4minnisX1.c1) covering 20110701-present became available. Here is a summary of changes from V3 to V4 sent from Mandy. "The changes in the algorithm from v3 to v4 involve a number of minor, constantly evolving issues such as visible calibration etc. The major improvements included in this upgrade are: 1) improved models accounting for the roughness of ice crystals, which should improve derived ice cloud properties 2) improved clear sky maps, especially over snow-covered surfaces 3) improved cloud mask, including improvements during twilight (SZA ~82-90 degrees). "
Data User NotesGridded results from the *visstgrid*minnisX1.c1.* datastreams, mainly during 2006-2013, may have been impacted by a memory allocation error, causing erroneous values in a few percent of regions for the following variables:
Example DataSee Satellite Imagery and Cloud Products produced by Minnis Group.
Quicklook LinksSee Satellite Imagery and Cloud Products produced by Minnis Group.
|AVHRR||Advanced Very High Resolution Radiometer|
|GOES||Geostationary Operational Environmental Satellite|
|LBTM||Layered Bispectral Threshold Method|
|MTSAT||Multi-functional Transport SATellite|
|SINT||Solar-infrared Infrared Near-Infrared Technique|
|SIST||Solar-infrared Infrared Split-Window Technique|
|VISST||Visible Infrared Solar-Infrared Split Window Technique|
Citable ReferencesMinnis, P., S. Sun-Mack, D. F. Young, P. W. Heck, D. P. Garber, Y. Chen, D. A. Spangenberg, R. F. Arduini, Q. Z. Trepte, W. L. Smith, Jr., J. K. Ayers, S. C. Gibson, W. F. Miller, V. Chakrapani, Y. Takano, K.-N. Liou, Y. Xie, and P. Yang, 2011: CERES Edition-2 cloud property retrievals using TRMM VIRS and Terra and Aqua MODIS data, Part I: Algorithms . IEEE Trans. Geosci. Remote Sens., 49, 11, 4374-4400.
Minnis, P., L. Nguyen, R. Palikonda, P. W. Heck, D. A. Spangenberg, D. R. Doelling, J. K. Ayers, W. L. Smith, Jr., M. M. Khaiyer, Q. Z. Trepte, L. A. Avey, F.-L. Chang, C. R. Yost, T. L. Chee, and S. Sun-Mack, 2008: Near-real time cloud retrievals from operational and research meteorological satellites . Proc. SPIE Europe Remote Sens. 2008, Cardiff, Wales, UK, 15-18 September, 7107-2, 8 pp.