"High IASI MetOp-C Ash/Dust BTD (4 in [9.00, 9.65]) at (31N,5W) 22:04Z"

"2021-07-10 22:04Z granule 442"

"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 http://satepsanone.nesdis.noaa.gov/pub/IASI/M03/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)"
  31.21,   -5.30,    9.65,   -0.31,  294.05,  284.40
  31.50,   -4.88,    9.64,   -0.75,  289.42,  279.78
  30.81,   -4.75,    9.49,   -0.36,  293.14,  283.66
  31.03,   -4.80,    9.42,    0.08,  286.58,  277.16