GOES-16 Geostationary Lightning Mapper (GLM) products on EUMETCast soon

GLM products from GOES-16 will be available on EUMETCast from 16 April.

Thursday, 12 April 2018

These are Level 2 products GLM Level 2 data — GOES-R (flashes, groups, events) with 20-second refresh rate, collected in files (tared and gziped) for 15 minutes. The product format is netCDF.

Filename convention:

OR_GLM-L2-LCFA_G16_s<start_time YYYYMMdddHHMMSSS>_e<end_time_YYYYMMdddHHMMSSS>c<processing_time YYYYMMdddHHMMSSS>.tgz

Example filename:

OR_GLM-L2-LCFA_G16_s20180581415000_e20180581430000_c2018058143434.tgz

The products will be distributed on EUMETCast Europe, on channel E2H-TPG-1 (PID: 610, Multicast address: 224.223.224.2).

Information on the GLM data processing and GLM L2 products can be found in NOAA’s Algorithm Theoretical Basis Document and Product Definition and Users’ Guide.

NOTE: During eclipse season with the GOES-R satellite series Geostationary Lightning Mapper, solar intrusion into the lens assembly will result in localised blooming (false events) and saturation (blind regions) in the data. These effects will occur daily around 04:15 UTC – 05:45 UTC. The daily effects begin with many false events at the limb, which cover regions of varying size and location as the eclipse features move across the field of view. The false events will peak during the beginning and end of the eclipse season and the 20-second files will intermittently peak in size above 3-5 MB per file during false events, which is well above the average of ~0.3 MB per file.

The increased number of false events can cause an overflow condition in the electronics which saturates the event processing. This saturation creates blind regions in the data outside of the areas impacted by the solar intrusion. The length of these temporary outages depends on the region, and is in the order of minutes. A blooming filter is being developed by NOAA to remove the event spikes, although lightning detection outages will remain in the affected regions. A data quality product is under development by NOAA to notify users of impacts during future eclipse seasons.

Users wishing to receive GOES-16 GLM products should register via our Earth Observation Portal (EOP).

For more information, contact our User Service Helpdesk.

 

 
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