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APPLICATIONS OF METEOSAT SECOND GENERATION (MSG)

APPLICATIONS OF METEOSAT SECOND GENERATION (MSG). RGB IMAGES: PART 04 RGB COMPOSITES WITH CHANNELS 01-11 AND THEIR INTERPRETATION Author: Jochen Kerkmann (EUMETSAT) kerkmann@eumetsat.de Contributors: D. Rosenfeld (HUJ). PART 4:

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APPLICATIONS OF METEOSAT SECOND GENERATION (MSG)

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  1. APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 04 RGB COMPOSITES WITH CHANNELS01-11 AND THEIR INTERPRETATION Author: Jochen Kerkmann (EUMETSAT) kerkmann@eumetsat.de Contributors: D. Rosenfeld (HUJ)

  2. PART 4: RED-GREEN-BLUE COLOUR COMPOSITES WITH CHANNELS 01 - 11AND THEIR INTERPRETATION

  3. Recommended Schemes forRGB Image Composites RGB Composite Applications Time RGB 03,02,01: Vegetation, Snow, Smoke, Dust, Fog Day RGB 02,04r,09: Clouds, Convection, Snow, Fog, Fires Day RGB 02,03,04r: Clouds, Convection, Snow, Dust, Fog, Fires Day RGB 10-09,09-04,09: Clouds, Convection, Fog, Contrails, Fires Night RGB 10-09,09-07,09: Dust, Contrails Day & Night RGB 05-06,04-09,03-01: Severe Convection Day 1. 2. 3. 4. 5. 6.

  4. 1. RGB 03,02,01 ("Day Natural Colours") R = Channel 03 (NIR1.6) G = Channel 02 (VIS0.8) B = Channel 01 (VIS0.6) Applications: Vegetation, Dust, Smoke, Fog, Snow

  5. 1. RGB 03,02,01 ("Day Natural Colours") Recommended Range and Enhancement: Beam Channel Range Gamma Gamma2 Red 03 (NIR1.6) 0 …+100 % 1.0 1.0 Green 02 (VIS0.8) 0 ... +100 % 1.0 1.0 Blue 01 (VIS0.6) 0 ... +100 % 1.0 1.0

  6. Ch.03 NIR1.6 Ch.02 VIS0.8 Ch.01 VIS0.6

  7. RGB 03,02,01 Example: Snow NIR1.6 VIS0.8 VIS0.6 In RGB 03,02,01 images, snow appears in cyan colour !

  8. RGB 03,02,01 Example: Snow MSG-1, 18 February 2003, 13:00 UTC

  9. RGB 03,02,01 Example: Vegetation NIR1.6 VIS0.8 VIS0.6 In RGB 03,02,01 images, vegetation appears in greenish colours !

  10. RGB 03,02,01 Example: Vegetation MSG-1, 23 June 2003, 15:00 UTC

  11. RGB 03,02,01 Example: Desert NIR1.6 VIS0.8 VIS0.6 In RGB 03,02,01 images, deserts appear in reddish colours !

  12. RGB 03,02,01 Example: Desert MSG-1, 31 October 2003, 11:30 UTC

  13. RGB 03,02,01 Example: Low-level Water Clouds (St, Sc) NIR1.6 VIS0.8 VIS0.6 In RGB 03,02,01 images, low water clouds with small droplets appear in whitish-pinkish colours !

  14. RGB 03,02,01 Example: Low-level Water Clouds (St, Sc) MSG-1, 18 February 2003, 13:00 UTC

  15. 2. RGB 02,04r,09 ("Day Microphysical") R = Channel 02 (VIS0.8) G = Channel 04r (IR3.9, solar component) B = Channel 09 (IR10.8) Applications: Cloud Analysis, Convection, Fog, Snow, Fires

  16. 2. RGB 02,04r,09 ("Day Microphysical") Recommended Range and Enhancement (Summer): Beam Channel Range Gamma Gamma2 Red 02 (VIS0.8) 0 …+100 % 1.0 1.0 Green 04r (IR3.9r) 0 ... +60 % 2.5 1.0 Blue 09 (IR10.8) +203 ... +323 K 1.0 1.0

  17. 2. RGB 02,04r,09 ("Day Microphysical") Recommended Range and Enhancement (Winter): Beam Channel Range Gamma Gamma2 Red 02 (VIS0.8) 0 …+100 % 1.0 1.0 Green 04r (IR3.9r) 0 ... +25 % 1.5 1.0 Blue 09 (IR10.8) +203 ... +323 K 1.0 1.0

  18. Ch.02 VIS0.8 Ch.04r IR3.9r Ch.09 IR10.8 MSG-1, 8 September 2003, 12:00 UTC RGB Composite 02,04r,09 "winter" enhancement (see previous slide)

  19. RGB 02,04r,09 Example: Severe Convection VIS0.8 IR3.9r IR10.8 In RGB 02,04r,09 images, cold Cb clouds with small ice particles appear in light orange colours !

  20. RGB 02,04r,09 Example: Severe Convection MSG-1, 20 May 2003, 13:30 UTC ("winter" enhancement)

  21. RGB 02,04r,09 Example: Ship Trails VIS0.8 IR3.9r IR10.8 In RGB 02,04r,09 images, ship trails (small droplets) appear in whitish - light greenish colours !

  22. RGB 02,04r,09 Example: Ship Trails MSG-1, 7 September 2003, 11:45 UTC ("winter" enhancement)

  23. RGB 02,04r,09:Physical Interpretation for Clouds Red: Cloud depth and amount of cloud water and ice, provided by the visible reflectance at 0.8 mm. Green: Cloud particle size and phase, approximated by the 3.9 mm solar reflectance component. Blue: Temperature, provided by the 10.8 mm channel.

  24. RGB 02,04r,09: Interpretation of Colours

  25. Low red: Dark and thin clouds RGB 02,04r,09: Interpretation of Colours

  26. RGB 02,04r,09: Interpretation of Colours

  27. 3. RGB 02,03,04r ("Day Solar") R = Channel 02 (VIS0.8) G = Channel 03 (NIR1.6) B = Channel 04r (IR3.9r, solar component) Applications: Cloud Analysis, Convection, Fog, Snow, Fires

  28. 3. RGB 02,03,04r ("Day Solar") Recommended Range and Enhancement (Summer): Beam Channel Range Gamma Gamma2 Red 02 (VIS0.8) 0 …+100 % 1.7 1.0 Green 03 (NIR1.6) 0 … +70 % 1.7 1.0 Blue 04r (IR3.9r) 0 … +60 % 2.5 1.0

  29. 3. RGB 02,03,04r ("Day Solar") Recommended Range and Enhancement (Winter): Beam Channel Range Gamma Gamma2 Red 02 (VIS0.8) 0 …+100 % 1.7 1.0 Green 03 (NIR1.6) 0 ... +70 % 1.7 1.0 Blue 04r (IR3.9r) 0 … +30 % 1.7 1.0

  30. Ch.02 VIS0.8 Ch.03 NIR1.6 Ch.04r IR3.9r MSG-1, 24 February 2003, 11:00 UTC RGB Composite 02,03,04r "winter" enhancement (see previous slide)

  31. RGB 02,03,04r Example: Snow VIS0.8 NIR1.6 IR3.9r In RGB 02,03,04r images, snow appears in bright reddish colours !

  32. RGB 02,03,04r Example: Snow MSG-1, 26 January 2004, 10:00 UTC ("winter" enhancement)

  33. 4. RGB 10-09,09-04,09 ("Night Microphysical") R = Difference IR12.0 - IR10.8 G = Difference IR10.8 - IR3.9* B = Channel IR10.8 Applications: Cloud Analysis, Fog, Contrails, Fires *Note: CO2-corrected brightness temperature of channel 04 (IR3.9)

  34. 4. RGB 10-09,09-04,09 ("Night Microphysical") Recommended Range and Enhancement (Low Clouds, Fog): Beam Channel Range Gamma Gamma2 Red IR12.0 - IR10.8 -4 … +2 1.0 1.0 Green IR10.8 - IR3.9* 0 … +6 2.0 1.0 Blue IR10.8 +243 … +293 1.0 1.0 *Note: CO2-corrected brightness temperature of channel 04 (IR3.9)

  35. 4. RGB 10-09,09-04,09 ("Night Microphysical") Recommended Range and Enhancement (High Clouds, Fires): Beam Channel Range Gamma Gamma2 Red IR12.0 - IR10.8 -4 … 0 1.0 3.0 Green IR10.8 - IR3.9* -15 … +6 2.5 1.0 Blue IR10.8 +223 … +293 1.0 1.0 *Note: CO2-corrected brightness temperature of channel 04 (IR3.9)

  36. Ch.10 -Ch.09 Ch.09 -Ch.04 Ch.09 MSG-1, 9 November 2003, 02:45 UTC RGB Composite 10-09,09-04,09 "low clouds" enhancement (see previous slide)

  37. RGB 10-09,09-04,09 Example: Fog 10 - 09 09 - 04 09 In RGB 10-09,09-04,09 images, night-time fog appears in light greenish colours !

  38. RGB 10-09,09-04,09 Example: Fog MSG-1, 26 January 2004, 01:00 UTC ("low clouds" enhancement)

  39. RGB 10-09,09-04,09 Example: Cb 10 - 09 09 - 04 09 In RGB 10-09,09-04,09 images, thick Cb clouds at night appear in sprenkled orange-red colour (noise in channel 04)!

  40. RGB 10-09,09-04,09 Example: Cb MSG-1, 23 April 2003, 19:00 UTC ("high clouds" enhancement)

  41. RGB 10-09,09-04,09 Example: Cirrus 10 - 09 09 - 04 09 In RGB 10-09,09-04,09 images, thin Cirrus appears in dark bluish colours !

  42. RGB 10-09,09-04,09 Example: Cirrus MSG-1, 3 August 2003, 02:00 UTC ("high clouds" enhancement)

  43. 5. RGB 10-09,09-07,09 ("Dust") R = Difference IR12.0 - IR10.8 G = Difference IR10.8 - IR8.7 B = Channel IR10.8 Applications: Dust (day and night), Contrails

  44. 5. RGB 10-09,09-07,09 ("Dust") Recommended Range and Enhancement: Beam Channel Range Gamma Gamma2 Red IR12.0 - IR10.8 -4 … +2 1.0 1.0 Green IR10.8 - IR8.7 0 … +15 2.5 1.0 Blue IR10.8 +261 … +289 1.0 1.0

  45. Ch.10 -Ch.09 Ch.09 -Ch.07 Ch.09 MSG-1, 3 March 2004, 01:00 UTC RGB Composite 10-09,09-07,09

  46. RGB 10-09,09-04,09 Example: Dust 10 - 09 09 - 07 09 In RGB 10-09,09-07,09 images, dust appears in magenta colours !

  47. RGB 10-09,09-07,09 Example: Dust (day) MSG-1, 3 March 2004, 10:00 UTC

  48. RGB 10-09,09-07,09 Example: Dust (day) MSG-1, 25 June 2003, 10:00 UTC

  49. 6. RGB 05-06,04-09,03-01 ("Convective Storms") R = Difference WV6.2 - WV7.3 G = Difference IR3.9* - IR10.8 B = Difference NIR1.6 - VIS0.6 Applications: Severe Storms *Note: CO2-corrected brightness temperature of channel 04 (IR3.9)

  50. 6. RGB 05-06,04-09,03-01 ("Convective Storms") Recommended Range and Enhancement: Beam Channel Range Gamma Gamma2 Red WV6.2 - WV7.3 -30 … 0 1.0 1.0 Green IR3.9* - IR10.8 0 … +50 or +55 0.5 1.0 Blue NIR1.6 - VIS0.6 -70 … +20 1.0 1.0 *Note: CO2-corrected brightness temperature of channel 04 (IR3.9)

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