Version 1.0, 30 June 2004 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 05 RGB COMPOSITES WITH CHANNEL 12 AND THEIR INTERPRETATION.

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Version 1.0, 30 June 2004 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 05 RGB COMPOSITES WITH CHANNEL 12 AND THEIR INTERPRETATION Author:Jochen Kerkmann (EUMETSAT)

Version 1.0, 30 June 2004 PART 5: RED-GREEN-BLUE COLOUR COMPOSITES WITH CHANNEL 12 (HRV) AND THEIR INTERPRETATION

Version 1.0, 30 June 2004 In order to preserve the high resolution of the HRV channel, it should be assigned to 2 colours The HRV has a three times higher resolution than the other channels, i.e. a zoom factor of 3 is needed for the IR channels RGBs with the HRV Channel: Introduction

Version 1.0, 30 June 2004 Recommended Schemes for RGB Image Composites with Channel 12 (HRV) RGB CompositeApplicationsTime RGB 12,12,09i:Clouds, ConvectionDay RGB 03,12,12:Snow, FogDay RGB 12,12,04-09:Severe StormsDay

Version 1.0, 30 June 2004 R = Channel 12 (HRV) G = Channel 12 (HRV) B = Channel 09i (IR10.8i) 1. RGB 12,12,09i ("HRV Clouds") (similar to traditional NOAA AVHRR 1,2,4) Applications: Clouds, Convection

Version 1.0, 30 June 2004 Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 Red12 (HRV)0 …+100 % Green12 (HRV) % Blue09i (IR10.8i) K RGB 12,12,09i ("HRV Clouds")

Version 1.0, 30 June 2004 Ch.12 HRV Ch.12 HRV Ch.09i IR10.8i

Version 1.0, 30 June 2004 Colour Interpretation of RGB 12,12,09i Images

Version 1.0, 30 June 2004 Comparison HRV vs RGB 12,12,09i MSG-1, 13 June 2003, 14:00 UTC The RGB 12,12,09i helps to detect thin Ci clouds and to distinguish between thick Cb clouds and Ci anvils

Version 1.0, 30 June 2004 R = Channel 03 (NIR1.6) G = Channel 12 (HRV) B = Channel 12 (HRV) 2. RGB 03,12,12 ("HRV Fog") Applications: Snow, Fog

Version 1.0, 30 June 2004 Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 Red03 (NIR1.6)0 …+70 % Green12 (HRV) % Blue12 (HRV) % RGB 03,12,12 ("HRV Fog")

Version 1.0, 30 June 2004 Ch.03 NIR1.6 Ch.12 HRV Ch.12 HRV

Version 1.0, 30 June 2004 Colour Interpretation of RGB 03,12,12 Images

Version 1.0, 30 June 2004 Comparison HRV vs RGB 03,12,12 MSG-1, 24 February 2003, 11:00 UTC The RGB 03,12,12 helps to distinguish between fog and snow

Version 1.0, 30 June 2004 R = Channel 12 (HRV) G = Channel 12 (HRV) B = BTD (IR10.8-IR3.9) 3. RGB 12,12, ("HRV Severe Storms") Applications: Severe Storms

Version 1.0, 30 June 2004 Recommended Range and Enhancement: BeamChannelRangeGammaGamma2 Red12 (HRV)70 …+100 % Green12 (HRV) % BlueIR10.8-IR K RGB 12,12,09-04 ("HRV Severe Storms")

Version 1.0, 30 June 2004 Ch.12 HRV Ch.12 HRV Ch

Version 1.0, 30 June 2004 Colour Interpretation of RGB 12,12,09-04 Images

Version 1.0, 30 June 2004 Comparison HRV vs RGB 12,12,09-04 MSG-1, 13 June 2003, 14:00 UTC The RGB 12,12,09-04 helps to detect the most vigorous storms (with the strongest updrafts)