"High IASI MetOp-C Ash/Dust BTD (4 in [9.00, 9.79]) at (28N,0E) 20:43Z"

"2021-07-09 20:43Z granule 415"

"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)"
  27.73,    0.35,    9.79,    0.09,  297.19,  287.40
  27.17,   -2.43,    9.38,   -0.61,  295.04,  285.65
  27.62,   -0.82,    9.27,    0.05,  299.71,  290.44
  27.14,   -1.69,    9.18,   -0.27,  298.01,  288.83