1. APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB COMPOSITES WITH CHANNEL 12 AND THEIR INTERPRETATION

2. 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

3. Recommended Range and Enhancement: BeamChannelRangeGamma Red12 (HRV)0 …+100 %1.7 Green12 (HRV)0... +100 %1.7 Blue09i (IR10.8i)+323... +203 K1.0 RGB 12,12,09i ("HRV Clouds")

4. Ch.12 HRV Ch.12 HRV Ch.09i IR10.8i

5. Colour Interpretation of RGB 12,12,09i Images

6. Example: river valley fog over Germany

7. Example: severe convective storms over Spain

8. 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