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PRODUCTS
Overview
Collection 006 Update
Collection 051 Update
Collection 005 Update
Calendar
PGE03 Version History
PGE04 Version History
PGE06 Version History
PGE56 Version History
PGE57 Version History
PGE70 Version History
PGE83 Version History
Acquisition
Known Problems
Filename Convention
Flow Diagram

PGE Version History


PGE56 (and PGE69) Version Detail   Product impact changes only
High Impact = High Impact     Moderate Impact = Moderate Impact     Low Impact = Low Impact
(Dates show approximate starting production date)

Daily Global (08_D3) HDF products are produced from the Program Executable (PGE) identified as PGE56 (derived from the intermediate 5-degree tile product produced from PGE69). One may identify the maturity and quality of an HDF data product by finding the PGE (program executable) version that was used to produce the file. This information can be obtained directly from the HDF file itself by using the HDF utility ncdump. The (UNIX) command is ncdump -h *.hdf | awk '/PGEVERSIONCLASS/,/END_GROUP/' . One may also find PGE version information in the ascii text met (metadata) file associated with a particular HDF file. Another slightly less reliable way to determine the PGE version is through the "processing date & time" field of the HDF filename (field #4 in L3 HDF files, see HDF Filename convention). Users then match the processing date in the HDF filename with the production start date for various PGE versions in blue in the listing below. If you have any questions about this, contact Paul Hubanks.

PGE56 v51.0.0 includes:       ( Aqua (only) Forward & Reprocess: 1.Nov.2008 )

  • Daily Product Rerun with updated C051 L2 Inputs
      High Impact Collection 051. There were no changes in the PGE56 algorithm for Collection 051; however changes in the upstream L2 products (Aerosol and Cloud) needed to be propagated into the L3 files. To view the changes in the upstream L2 products, see the Collection 051 Change Document (linked to the right).   View the PDF Document (PDF)

PGE56 v5.2.1 includes:       ( Terra Forward & Reprocess: ~1.Feb.2006 )

  • Initial Collection 005 Version
      High Impact Start of C005. See Level-3 (L3) Daily change document (PDF) linked from the Collection 005 Update page to view Collection 004 to Collection 005 changes and improvements.



Start of Terra Collection 005     Start of Aqua Collection 005


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PGE57 HISTORY