Central Facility Presentation

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APPLICATIONS OF METEOSAT SECOND GENERATION (MSG)
RGB IMAGES PART 04 RGB COMPOSITES WITH
CHANNELS01-11 AND THEIR INTERPRETATION Author
Jochen Kerkmann (EUMETSAT) kerkmann_at_eumetsat.de
Contributors D. Rosenfeld (HUJ)
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PART 4 RED-GREEN-BLUE COLOUR COMPOSITES WITH
CHANNELS 01 - 11AND THEIR INTERPRETATION
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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.
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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
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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
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Ch.03 NIR1.6 Ch.02 VIS0.8 Ch.01 VIS0.6
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RGB 03,02,01 Example Snow
NIR1.6 VIS0.8 VIS0.6
In RGB 03,02,01 images, snow appears in cyan
colour !
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RGB 03,02,01 Example Snow
MSG-1, 18 February 2003, 1300 UTC
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RGB 03,02,01 Example Vegetation
NIR1.6 VIS0.8 VIS0.6
In RGB 03,02,01 images, vegetation appears in
greenish colours !
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RGB 03,02,01 Example Vegetation
MSG-1, 23 June 2003, 1500 UTC
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RGB 03,02,01 Example Desert
NIR1.6 VIS0.8 VIS0.6
In RGB 03,02,01 images, deserts appear in reddish
colours !
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RGB 03,02,01 Example Desert
MSG-1, 31 October 2003, 1130 UTC
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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 !
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RGB 03,02,01 Example Low-level Water Clouds (St,
Sc)
MSG-1, 18 February 2003, 1300 UTC
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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
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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
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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
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Ch.02 VIS0.8 Ch.04r IR3.9r Ch.09 IR10.8
MSG-1, 8 September 2003, 1200 UTC RGB Composite
02,04r,09 "winter" enhancement (see previous
slide)
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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 !
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RGB 02,04r,09 Example Severe Convection
MSG-1, 20 May 2003, 1330 UTC ("winter"
enhancement)
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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 !
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RGB 02,04r,09 Example Ship Trails
MSG-1, 7 September 2003, 1145 UTC ("winter"
enhancement)
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RGB 02,04r,09Physical 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.
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RGB 02,04r,09 Interpretation of Colours
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RGB 02,04r,09 Interpretation of Colours
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RGB 02,04r,09 Interpretation of Colours
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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
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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
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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
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Ch.02 VIS0.8 Ch.03 NIR1.6 Ch.04r IR3.9r
MSG-1, 24 February 2003, 1100 UTC RGB Composite
02,03,04r "winter" enhancement (see previous
slide)
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RGB 02,03,04r Example Snow
VIS0.8 NIR1.6 IR3.9r
In RGB 02,03,04r images, snow appears in bright
reddish colours !
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RGB 02,03,04r Example Snow
MSG-1, 26 January 2004, 1000 UTC ("winter"
enhancement)
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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)
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4. RGB 10-09,09-04,09 ("Night Microphysical")
Recommended Range and Enhancement (Low Clouds,
Fog) Beam Channel Range Gamma Gamma2 Red IR
12.0 - 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)
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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)
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Ch.10 -Ch.09 Ch.09 -Ch.04 Ch.09
MSG-1, 9 November 2003, 0245 UTC RGB Composite
10-09,09-04,09 "low clouds" enhancement (see
previous slide)
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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 !
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RGB 10-09,09-04,09 Example Fog
MSG-1, 26 January 2004, 0100 UTC ("low clouds"
enhancement)
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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)!
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RGB 10-09,09-04,09 Example Cb
MSG-1, 23 April 2003, 1900 UTC ("high clouds"
enhancement)
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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 !
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RGB 10-09,09-04,09 Example Cirrus
MSG-1, 3 August 2003, 0200 UTC ("high clouds"
enhancement)
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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
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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
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Ch.10 -Ch.09 Ch.09 -Ch.07 Ch.09
MSG-1, 3 March 2004, 0100 UTC RGB Composite
10-09,09-07,09
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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 !
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RGB 10-09,09-07,09 Example Dust (day)
MSG-1, 3 March 2004, 1000 UTC
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RGB 10-09,09-07,09 Example Dust (day)
MSG-1, 25 June 2003, 1000 UTC
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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)
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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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Ch.05 -Ch.06 Ch.04 -Ch.09 Ch.03 -Ch.01
MSG-1, 8 September 2003, 1200 UTC RGB Composite
05-06,04-09,03-01
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RGB 05-06,04-09,03-01 ExampleSevere Convection
05 - 06 04 - 09 03 - 01
In RGB 05-06,04-09,03-01 images, cold Cb tops
with small ice particles appear in yellowish
colours (Cbs with large ice particles appear in
reddish colours) !
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RGB 05-06,04-09,03-01 ExampleSevere Convection
RGB 02,04r,09
RGB 05-06,04-09,03-01
(for comparison)
better identification of young, severe storms
MSG-1, 20 May 2003, 1330 UTC
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RGB 05-06,04-09,03-01 ExampleSevere Convection
RGB 02,04r,09
RGB 05-06,04-09,03-01
(for comparison)
better identification of young, severe storms
MSG-1, 13 June 2003, 1200 UTC
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RGB 05-06,04-09,03-01 ExampleSevere Convection
RGB 02,04r,09
RGB 05-06,04-09,03-01
(for comparison)
better identification of young, severe storms
MSG-1, 3 February 2004, 1130 UTC