Topic:  Activation of Modified Global Mosaic of Geostationary Satellite Imagery (GMGSI) Products

Date/Time Issued:   June 5, 2020   1550 UTC

Product(s) or Data Impacted:  GMGSI Product Suite (all four spectral bands)

Date/Time of Initial Impact:  June 10, 2020   1500 UTC

Date/Time of Expected End:  N/A

Details/Specifics of Change:  To improve compatibility with NWS AWIPS display, a modified version of the GMGSI product suite will be activated on June 10 at 1500 UTC on the PDA (netCDF4 format) and GEODIST (McIDAS area file format).  A minor change was made to geolocation settings (i.e., negligible effect on gap at the International Date Line) and should be transparent for all users of the products.  The GMGSI products affected and associated file names are:


        PDA File Names (Short Name)                          File Name Pattern


GMGSI_LW_NetCDF (Longwave)



GMGSI_SW_NetCDF  (Shortwave)



GMGSI_VIS_NetCDF  (Visible)



GMGSI_WV_NetCDF  (Water Vapor)




         GEODIST File Names







In the event a Critical Weather Day (CWD) is issued from the NWS, the activation will be postponed.

Primary Contact for Further Information:  ESPC Operations at and 301-817-3880.


Web Site(s) for applicable information: N/A

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