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24-hour Microphysics Dust RGB

Alternative name: Dust RGB

MSG SEVIRI Dust RGB -- 22 February 2025, 12:45 UTC

Main applications

  • 24-hour dust detection

  • 24-hour detection of moisture boundaries over cloud-free areas

  • 24-hour detection of clouds (note: low-level clouds may not always be identified)

  • 24-hour detection of cloud phase

Remarks

  • This RGB uses the same channel combination as for the 24-hour Microphysics Cloud RGB, but with different value ranges applied.

  • Low clouds may not always be detected, which can lead to false identification of moisture boundary.

  • This RGB is particularly useful when the 24-hour Microphysics Cloud RGB becomes saturated or lacks sufficient contrast. In such cases, the Dust RGB---based on the same channels but with different tuning---should be used instead.

RGB Recipes by Satellite Instrument

MSG SEVIRI Dust RGB

Colour beam Channel (difference) Range min Range max Unit Gamma
Red IR12.0 -- IR10.8 -4 +2 K 1.0
Green IR10.8 -- IR8.7 0 +15 K 2.5
Blue IR10.8 261 289 K 1.0

MTG FCI Dust RGB

Agreed upon at the online workshop 2026-05-13

Proposed (I. Smiljanić, 2026)

Colour beam Channel (difference) Range min Range max Unit Gamma
Red IR12.0 -- IR10.8 -3.5 +1.0 K 1.0
Green IR10.5 -- IR8.7 1.0 12.0 K 3.3
Blue IR10.8 260 295.0 K 1.0

GOES ABI Dust RGB

Colour beam Channel (difference) Range min Range max Unit Gamma
Red IR12.3 -- IR10.3 -6.7 +2.6 K 1.0
Green IR11.2 -- IR8.4 -0.5 +20 K 2.5
Blue IR10.3 261.2 288.7 K 1.0

Himawari AHI Dust RGB

Colour beam Channel (difference) Range min Range max Unit Gamma
Red IR12.4 -- IR10.4 -7.5 +3 K 1.0
Green IR11.2 -- IR8.6 -0.5 +15.0 K 2.2
Blue IR10.4 261.5 289.2 K 1.0

FY-4 AGRI Dust RGB

Colour beam Channel (difference) Range min Range max Unit Gamma
Red IR12.0 -- IR10.8 -4.0 +2 K 1.0
Green IR10.8 -- IR8.55 0.0 +15.0 K 2.5
Blue IR10.8 261.0 289.0 K 1.0

Variant for users with Colour Vision Deficiency (CVD)

Full name: 24-hour Microphysics CVD Dust RGB

Alternative name: CVD Dust RGB

Main applications

  • 24-hour dust detection

  • 24-hour detection of moisture boundaries over cloud-free areas

  • 24-hour detection of clouds (note: low-level clouds may not always be identified)

  • 24-hour detection of cloud phase

Remarks

  • This variant of the RGB is designed specifically for users with Colour Vision Deficiency (CVD).

  • Low clouds may not always be detected, which can lead to false detection of moisture boundary.

  • This RGB is particularly useful when the 24-hour Microphysics Cloud RGB becomes saturated or lacks sufficient contrast. In such cases, the Dust RGB based on the same channels but with different tuning should be used instead.

GOES ABI CVD Dust RGB

Colour beam Channel (difference) Range min Range max Unit Gamma
Red IR10.3 -- IR8.4 +6 -0.5 K 0.67
Green IR12.3 -- IR10.3 -6 +2.5 K 0.67
Blue IR10.3 233 313 K 1.0