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Presentation transcript:

devised by: D. Rosenfeld Day Snow-Fog RGB devised by: D. Rosenfeld R = Channel 02 (VIS0.8) G = Channel 03 (NIR1.6) B = Channel 04r (IR3.9r, solar component) Applications: Fog/Low Clouds, Snow Area: Mid-High Latitudes Time: Day-Time in Winter

devised by: D. Rosenfeld Day Snow-Fog RGB devised by: D. Rosenfeld Recommended Range and Enhancement: Beam Channel Range Gamma Red 02 (VIS0.8) 0 …+100 % 1.0 Green 03 (NIR1.6) 0 ... +70 % 1.7 Blue 04r (IR3.9r) 0 … +30 % 1.7

Interpretation of Colours for Thick Ice and Water Clouds Deep precipitating cloud (precip. not necessarily reaching the ground) - bright, thick - large ice particles Deep precipitating cloud* - bright, thick - small ice particles *or thick, high-level lee cloudiness with small ice particles Thick water cloud with large droplets Thick water cloud with small droplets Ocean Veg. Land Desert Snow

Example 1: Snow over the Alpine Region Ch.02 VIS0.8 Ch.03 NIR1.6 Ch.04r IR3.9r MSG-1, 24 February 2003, 11:00 UTC Example 1: Snow over the Alpine Region

Example 2: Snow MSG-1, 26 January 2004, 10:00 UTC

Example 3: Low Clouds MSG-1, 26 January 2004, 10:00 UTC

Example 4: Snow over Turkey MSG-1, 27 Nov 2004, 10:00 UTC

Example 4: Comparison with Natural Colours RGB MSG-1, 27 Nov 2004, 10:00 UTC