ESDIS Weekly Metrics: July 20, 2026

Note that the volume distributed to end users per day, as a running average over the past four weeks, is 7.088 times the volume added to the archive per day.

Note that higher product latencies for:

• VIIRS-SNPP-Atmosphere, on July 16, 2026, were due to an issue with the USNOPW_VGD ancillary file used for VIIRS.
• VIIRS-NOAA-20-Land on July 17, 2026, were due to an issue with the USNOPW_VGD ancillary file used for VIIRS.
• VIIRS-SNPP-Land on July 17, 2026, were due to an issue with the USNOPW_VGD ancillary file used for VIIRS.
• VIIRS-NOAA-21-Land on July 17, 2026, were due to an issue with the USNOPW_VGD ancillary file used for VIIRS.

Note that higher product latencies for TROPOMI-SENTINEL-5P on July 15, 2026, were due to a minor systems issue.

Notes:

1. Latency for a data granule is defined as the time taken from the midpoint between the start and end of acquisition of the data to the granule being ready on-line for users to download.  
2. Duration covered by the data for a granule is defined differently for four different instruments (e.g., MODIS granules are 5 minutes long, while OMI NRT granules are 13 to 136 minutes long).
3. Over the past four weeks, more than 95% of near-real time (NRT) data requests for nearly all instruments were satisfied within 3 hours. The exceptions were OMPS-NOAA-21, TROPOMI-SENTINEL-5P, VIIRS-NOAA-20-Land, and VIIRS-SNPP-Land, which had rates of 50%, 89%, 91%, and 77%, respectively, of NRT data requests being satisfied within 3 hours.

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