Topic: GOES-17 (West) Geostationary Lightning Mapper Test
Date/Time Issued: July 09, 2021 1237Z
Product(s) or Data Impacted: GOES-17 GLM
 Date/Time of Initial Impact: July 12, 2021 2027Z
Date/Time of Expected End: July 20, 2021 1900Z
Length of Outage: Multiple 80min outages, one 24 hour degraded product period. See Details below.
Details/Specifics of Change: Starting on Monday July 12 at 2027UTC, GOES-17 GLM will perform testing to improve the data product. The outages and degradation period are listed below:
  •   July 12 20:27- 21:49UTC: 80min GLM outage
  •   July 13 08:49 -10:07UTC: 80min GLM outage
  •   July 13 20:27 - 21:49UTC: 80min GLM outage
  •   July 14 08:49 - 10:07UTC: 80min GLM outage
  •   July 14 20:27 - 21:49UTC: 80min GLM outage
  •   July 15 08:49 - 10:07UTC: 80min GLM outage
  •   July 19 19:00UTC to July 20 19:00UTC: 24 hour GLM degraded radiometric data
This testing will be postponed in the event of a critical weather day. Events will slip one business day, remaining at the same time of day, until they do not conflict with critical weather day. 

Contact information for further information: ESPC Operations at or 301-817-3880 24x7 or during normal business hours

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