"High IASI Metop-B Ash/Dust BTD (3 in [9.0, 11.9]) at (54N,166E) 10:04Z"

"2023-11-01 10:04Z granule 202"

"Brightness temperature difference for channel 2347 (1231.5
cm-1) minus channel 2093 (1168 cm-1). High values almost
always indicate dust storms or volcanic eruptions.

See https://www.ospo.noaa.gov/pub/Atmosphere/Soundings/iasi/m01/alerts/ASH_BTD/index.html."

Latitude (N), Longitude (E), "Ash Brightness Temperature Difference", "SO2 Brightness Temperature Difference", "Brightness Temperature for Channel 2347 (1231.50 cm-1)", "Brightness Temperature for Channel 2093 (1168.00 cm-1)"
  53.90,  165.97,   11.92,   15.94,  267.11,  255.19
  51.68,  169.46,   11.43,   18.95,  270.56,  259.13
  51.89,  169.41,   10.50,   18.83,  268.28,  257.78