National Aeronautics and Space Administration

Collections and Filenames

We have completed preparing one year of sample data (2018) for instrument teams to examine. All of that data has been loaded onto a GMAO HTTPS server for download. With the addition of multiple new grids in GEOS-IT and other GMAO product streams, it was necessary to revamp the collection identifiers used for the products. There is a table included here that maps the GEOS FP-IT collections to the new GEOS-IT collections and also includes links to the download directory for each data type.

GEOS-IT file names adopt a new ISO-compliant structure (CITATION) that differs from that used in GEOS FP-IT. The draft file specification document, when ready, will decribe this notation in detail. Additionally, the addition of cubed-sphere grid output in GEOS-IT has motivated a more general change to the filenames that can flexibly accommodate other types of native grids used in the geosciences. Changes include:

• Date/time conventions
• Grid conventions
• Collection names

While the collection names have changed, the variables contained in the collections are mostly the same as in GEOS-FPIT. The mapping between the GEOS-FPIT collections and the GEOS-IT collections are described in Table 1. Any differences are noted in a drop-down link in the table. The format of the files are the same: NetCDF-4. Instrument teams that are used to getting custom subsets from the GES DISC may have to work directly with them if those custom subsets are needed for evaluation of this 2018 sample data period.