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Version 1.0, 20 April 2005 Slide: 1
APPLICATIONS OFMETEOSAT SECOND GENERATION (MSG)RGB IMAGES: PART 04
RGB COMPOSITES WITH CHANNELS01-11 AND THEIR INTERPRETATION
Author:Author: Jochen Kerkmann (EUMETSAT)Jochen Kerkmann (EUMETSAT)jochen.kerkmann@eumetsat.intjochen.kerkmann@eumetsat.int
Contributors:Contributors: D. Rosenfeld (HUJ), G. Bridge (EUM)D. Rosenfeld (HUJ), G. Bridge (EUM)
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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 CompositeRGB Composite ApplicationsApplications TimeTime
RGB 03,02,01: Vegetation, Snow, Smoke, Dust, Fog DayRGB 02,04r,09: Clouds, Convection, Snow, Fog, Fires DayRGB 02,03,04r: Snow, Fog DayRGB 05-06,04-09,03-01: Severe Convection Day
RGB 10-09,09-04,09: Clouds, Fog, Contrails Night
RGB 10-09,09-07,09: Dust, Thin Clouds, Contrails Day & NightRGB 05-06,08-09,05 Severe Cyclones, Jets, PV Analysis Day & Night
1.2.3.4.
5.
6.7.
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R = Channel 03 (NIR1.6)G = Channel 02 (VIS0.8)B = Channel 01 (VIS0.6)
1. RGB 03, 02, 01("Day Natural Colours")
Applications:Applications: Vegetation, Dust, Smoke, Fog, SnowArea:Area: Full MSG Viewing AreaTime:Time: Day-Time
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Recommended Range and Enhancement:Recommended Range and Enhancement:
Beam Channel Range Gamma Gamma2
Red 03 (NIR1.6) 0 …+100 % 1.0 1.0Green 02 (VIS0.8) 0 ... +100 % 1.0 1.0Blue 01 (VIS0.6) 0 ... +100 % 1.0 1.0
1. RGB 03, 02, 01("Day Natural Colours")
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Ch.03NIR1.6
Ch.02VIS0.8
Ch.01VIS0.6
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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 !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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MSG-1, 18 February 2003, 13:00 UTC
RGB 03, 02, 01 Example: Snow
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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 !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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MSG-1, 23 June 2003, 15:00 UTC
RGB 03, 02, 01 Example: Vegetation
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NIR1.6
VIS0.8
VIS0.6
RGB 03, 02, 01 Example: Desert
In RGB 03,02,01 images, deserts appear in reddish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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MSG-1, 3 February 2004, 11:30 UTC
RGB 03, 02, 01 Example: Desert
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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 !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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MSG-1, 03 February 2004, 11:30 UTC
RGB 03, 02, 01 Example:Low-level Water Clouds (St, Sc)
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MSG-119 April 200512:00 UTC
RGB03, 02, 01
Global View
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RGB 03, 02, 01:Interpretation of Colours
Ocean Veg. Land Desert Snow
High-level ice clouds
Low-level water clouds
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R = Channel 02 (VIS0.8)G = Channel 04r (IR3.9, solar component)B = Channel 09 (IR10.8)
2. RGB 02, 04r, 09("Day Microphysical")
Applications:Applications: Cloud Analysis, Convection, Fog, Snow, FiresArea:Area: Full MSG Viewing AreaTime:Time: Day-Time
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2. RGB 02, 04r, 09("Day Microphysical")
Recommended Range and Enhancement Recommended Range and Enhancement ((SummerSummer):):
Beam Channel Range Gamma Gamma2
Red 02 (VIS0.8) 0 …+100 % 1.0 1.0Green 04r (IR3.9r) 0 ... +60 % 2.5 1.0Blue 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 (Recommended Range and Enhancement (WinterWinter):):
Beam Channel Range Gamma Gamma2
Red 02 (VIS0.8) 0 …+100 % 1.0 1.0Green 04r (IR3.9r) 0 ... +25 % 1.5 1.0Blue 09 (IR10.8) +203 ... +323 K 1.0 1.0
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Ch.02VIS0.8
Ch.04rIR3.9r
Ch.09IR10.8
MSG-1, 8 September 2003, 12:00 UTCRGB 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 !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 02, 04r, 09 Example:Severe Convection
MSG-1, 20 May 2003, 13:30 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 bluish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 02, 04r, 09 Example: Ship Trails
MSG-1, 7 September 2003, 11:45 UTC ("winter" enhancement)
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RGB 02, 04r, 09 Example: Fires
VIS0.8
IR3.9r
IR10.8
In RGB 02,04r,09 images, forest fires appear in cyan colour !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 02, 04r, 09 Example: Fires
MSG-1, 7 September 2003, 11:45 UTC ("winter" enhancement)
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Red: Cloud depth and amount of cloud water and ice,provided by the visible reflectance at 0.8 m.
Green: Cloud particle size and phase, approximated by the 3.9 m solar reflectance component.
Blue: Temperature, provided by the 10.8 m channel.
RGB 02, 04r, 09:Physical Interpretation for Clouds
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RGB 02, 04r, 09: Interpretation of Coloursfor High-level Clouds
Deep precipitating cloud(precip. not necessarily reaching the ground)
- bright, thick- large ice particles- cold cloud
Deep precipitating cloud(Cb cloud with strongupdrafts and severeweather)*
- bright, thick- small ice particles- cold cloud
*or thick, high-level lee cloudiness with small ice particles
Thin Cirrus cloud
(large ice particles)
Thin Cirrus cloud
(small ice particles)
Ocean Veg. Land Fires / Desert Snow
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RGB 02, 04r, 09: Interpretation of Coloursfor Mid-level Clouds
Supercooled, thickwater cloud
- bright, thick- large droplets
Supercooled, thickwater cloud
- bright, thick- small droplets
Supercooled thin watercloud with large droplets
Supercooled, thin watercloud with small droplets *
* or, in rare occasions,thin Ci cloud with smallice particles
Ocean Veg. Land Fires / Desert Snow
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RGB 02, 04r, 09: Interpretation of Coloursfor Low-level Clouds
Thick water cloud(warm rain cloud)- bright, thick- large droplets
Thick water cloud(no precipitation)- bright, thick- small droplets
Thin water cloud withlarge droplets
Thin water cloudwith small droplets
Ocean Veg. Land Fires / Desert Snow
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R = Channel 02 (VIS0.8)G = Channel 03 (NIR1.6)B = Channel 04r (IR3.9r, solar component)
3. RGB 02, 03, 04r("Day Solar")
Applications:Applications: Fog/Low Clouds, SnowArea:Area: Mid-High LatitudesTime:Time: Day-Time in Winter
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3. RGB 02, 03, 04r("Day Solar")
Recommended Range and Enhancement:Recommended Range and Enhancement:
Beam Channel Range Gamma Gamma2
Red 02 (VIS0.8) 0 …+100 % 1.7 1.0Green 03 (NIR1.6) 0 ... +70 % 1.71.0Blue 04r (IR3.9r) 0 … +30 % 1.7 1.0
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Ch.02VIS0.8
Ch.03NIR1.6
Ch.04rIR3.9r
MSG-1, 24 February 2003, 11:00 UTCRGB Composite 02, 03, 04r
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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 reddish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 02, 03, 04r Example: Snow
MSG-1, 26 January 2004, 10:00 UTC
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RGB 02, 03, 04r Example: Low Clouds
VIS0.8
NIR1.6
IR3.9r
In RGB 02,03,04r images, low-level cloudsappear in whitish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 02, 03, 04r Example: Low Clouds
MSG-1, 26 January 2004, 10:00 UTC
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RGB 02, 03, 04r: Interpretation of Coloursfor Thick Ice and Water Clouds
Deep precipitating cloud(precip. not necessarily reaching the ground)
- bright, thick- large ice particles
Ocean Veg. Land Desert Snow
Deep precipitating cloud*
- bright, thick- small ice particles
*or thick, high-level lee cloudiness with small ice particles Thick water cloud with
large dropletsThick water cloudwith small droplets
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R = Difference WV6.2 - WV7.3G = Difference IR3.9 - IR10.8B = Difference NIR1.6 - VIS0.6
4. RGB 05-06, 04-09, 03-01("Convective Storms")
Applications:Applications: Severe Convective StormsArea:Area: Full MSG Viewing AreaTime:Time: Day-Time
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4. RGB 05-06, 04-09, 03-01("Convective Storms")
Recommended Range and Enhancement:Recommended Range and Enhancement:
Beam Channel Range Gamma Gamma2
Red WV6.2 - WV7.3 -35 … +5 1.0 1.0Green IR3.9 - IR10.8 -5 … +60 0.5 1.0Blue NIR1.6 - VIS0.6 -75 … +25 1.0 1.0
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Ch.05-Ch.06
Ch.04-Ch.09
Ch.03-Ch.01
MSG-1, 8 September 2003, 12:00 UTCRGB Composite 05-06, 04-09, 03-01
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RGB 05-06, 04-09, 03-01 Example:Severe 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 !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 05-06, 04-09, 03-01 Example:Severe Convection
MSG-1, 20 May 2003, 13:30 UTC
RGB 02,04r,09 RGB 05-06,04-09,03-01 (for comparison) better identification of young, severe storms
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RGB 05-06, 04-09, 03-01 Example:Convection
05 - 06
04 - 09
03 - 01
In RGB 05-06,04-09,03-01 images, cold Cbs with large ice particles appear in reddish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 05-06, 04-09, 03-01 Example:Convection
MSG-1, 20 May 2003, 13:30 UTC
RGB 02,04r,09 RGB 05-06,04-09,03-01 (for comparison) better identification of young, severe storms
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RGB 05-06, 04-09, 03-01 Example:Severe Convection
MSG-1, 13 June 2003, 12:00 UTC
RGB 02,04r,09 RGB 05-06,04-09,03-01 (for comparison) better identification of young, severe storms
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RGB 05-06, 04-09, 03-01 Example:Severe Convection
MSG-1, 3 February 2004, 11:30 UTC
RGB 02,04r,09 RGB 05-06,04-09,03-01 (for comparison) better identification of young, severe storms
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RGB05-06, 04-09, 03-01
Global View
MSG-15 September 200415:00 UTC
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RGB 05-06, 04-09, 03-01:Interpretation of Colours
Deep precipitating cloud(precip. not necessarily reaching the ground)
- high-level cloud- large ice particles
Ocean Land
Thin Cirrus cloud
(large ice particles)
Thin Cirrus cloud
(small ice particles)
Deep precipitating cloud(Cb cloud with strongupdrafts and severeweather)*
- high-level cloud- small ice particles
*or thick, high-level lee cloudiness with small ice particles
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R = Difference IR12.0 - IR10.8G = Difference IR10.8 - IR3.9B = Channel IR10.8
5. RGB 10-09, 09-04, 09("Night Microphysical")
Applications:Applications: Cloud Analysis, Fog, ContrailsArea:Area: Full MSG Viewing AreaTime:Time: Night-Time
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5. RGB 10-09, 09-04, 09("Night Microphysical")
Recommended Range and Enhancement:Recommended Range and Enhancement:
Beam Channel Range Gamma Gamma2
Red IR12.0 - IR10.8-4 … +2 1.0 1.0Green IR10.8 - IR3.9 0 … +10 1.0 1.0Blue IR10.8 +243 … +293 1.0 1.0
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Ch.10-Ch.09
Ch.09-Ch.04
Ch.09MSG-1, 9 November 2003, 02:45 UTC
RGB Composite 10-09, 09-04, 09
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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 fogappears in light greenish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 10-09, 09-04, 09 Example: Fog
MSG-1, 14 March 2005, 00:00 UTC
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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 yellow-red colour (noise in channel 04)!
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 10-09, 09-04, 09 Example: Cb
MSG-1, 19 April 2005, 03:15 UTC
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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 cloudsappear in dark bluish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 10-09, 09-04, 09 Example: Cirrus
MSG-1, 18 March 2005, 00:00 UTC
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RGB10-09, 09-04, 09
Global View
MSG-13 February 200403:00 UTC
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RGB 10-09, 09-04, 09: Interpretationof Colours for High-level Clouds
Cold, thick, high-level cloud Very cold (< -50°C), thick,high-level cloud
Thin Cirrus cloud
Ocean Land
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RGB 10-09, 09-04, 09: Interpretationof Colours for Mid/Low-level Clouds
Thick, mid-level cloud Thin, mid-level cloud
Ocean Land
Low-level cloud(cold atmosphere, Europe)
Low-level cloud(warm atmosphere, Africa)
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R = Difference IR12.0 - IR10.8G = Difference IR10.8 - IR8.7B = Channel IR10.8
6. RGB 10-09, 09-07, 09("Dust")
Applications:Applications: Dust, Thin Clouds, ContrailsArea:Area: Full MSG Viewing AreaTime:Time: Day and Night
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6. RGB 10-09, 09-07, 09("Dust")
Recommended Range and Enhancement:Recommended Range and Enhancement:
Beam Channel Range Gamma Gamma2
Red IR12.0 - IR10.8-4 … +2 1.0 1.0Green IR10.8 - IR8.7 0 … +15 2.5 1.0Blue 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, 01:00 UTCRGB 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 !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 10-09, 09-07, 09 Example: Dust
MSG-1, 3 March 2004, 10:00 UTC
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RGB 10-09, 09-07, 09 Example: Dust
MSG-1, 25 June 2003, 10:00 UTC
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RGB 10-09, 09-07, 09
Global View
MSG-122 January 200412:00 UTC
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RGB 10-09, 09-07, 09: Interpretationof Colours for High-level Clouds
Cold, thick, high-level clouds Thin Cirrus cloudsContrails
Ocean Warm Desert Cold Desert Warm Land Cold Land
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RGB 10-09, 09-07, 09: Interpretationof Colours for Low/Mid-level Clouds
Ocean Warm Desert Cold Desert Warm Land Cold Land
Thick, mid-level cloud
Thin, mid-level cloud
Low-level cloud(cold atmosphere,
Europe)
Low-level cloud(warm atmosphere,
Africa)
Dust Storm
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R = Difference WV6.2 - WV7.3G = Difference IR9.7 - IR10.8B = Channel WV6.2i
7. RGB 05-06, 08-09, 05i("Airmass")
Applications:Applications: Rapid Cyclogenesis, Jet Stream Analysis, PV AnalysisArea:Area: Full MSG Viewing AreaTime:Time: Day and Night
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Recommended Range and Enhancement:Recommended Range and Enhancement:
Beam Channel Range Gamma Gamma2
Red WV6.2 - WV7.3 -25 … 0 1.0 1.0Green IR9.7 - IR10.8 -40 … +5 1.0 1.0Blue WV6.2 +243 … +208 1.0 1.0
7. RGB 05-06, 08-09, 05i("Airmass")
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Ch.05-Ch.06
Ch.08-Ch.09
Ch.05i
MSG-1, 7 January 2005, 03:00 UTCRGB Composite 05-06, 08-09, 05i
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RGB 05-06, 08-09, 05i Example: Advection Jet
05 - 06
08 - 09
05i
In RGB 05-06,08-09,05i images, dry descending stratospheric air related to an advection jet appears in reddish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 05-06, 08-09, 05i Example: Advection Jet
MSG-1, 7 January 2005, 22:00 UTC
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RGB 05-06, 08-09, 05i Example: Warm Airmass
05 - 06
08 - 09
05i
In RGB 05-06,08-09,05i images, warm airmasses with high tropopause appear in greenish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 05-06, 08-09, 05i Example: Warm Airmass
MSG-1, 7 January 2005, 22:00 UTC
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RGB 05-06, 08-09, 05i Example: Cold Airmass
05 - 06
08 - 09
05i
In RGB 05-06,08-09,05i images, cold airmasses with low tropopause appear in bluish colours !
The values shown above (in the red box) correspond tothe location (shown by an arrow) on the next slide !
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RGB 05-06, 08-09, 05i Example: Cold Airmass
MSG-1, 7 January 2005, 22:00 UTC
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RGB 05-06, 08-09, 05i
Global View
MSG-119 April 200510:00 UTC
Note: warm airmasses seen at a high satellite viewing angle appear with a bluish colour (limb cooling effect) !
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RGB 05-06, 08-09, 05i:Interpretation of Colours
Thick, high-level clouds
Thick, mid-level clouds
Thick, low-level clouds
(warm airmass)
Thick, low-level clouds
(cold airmass)
Jet (high PV) Cold Airmass Warm Airmass Warm Airmass High UTH Low UTH