Version 1.0, 14 May 2004 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) FOG DETECTION Author:Jochen Kerkmann (EUMETSAT)

Slides:



Advertisements
Similar presentations
Version 0.3, 28 January 2004 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) DETECTION OF CONTRAILS Author:Jochen Kerkmann (EUMETSAT)
Advertisements

Image Interpretation for Weather Analysis Part I 29 October 2009 Dr. Steve Decker.
Version 1.0, 30 November 2004 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) DETECTION OF CONTRAILS Author:Jochen Kerkmann (EUMETSAT)
Version 1.0, 30 November 2004 Slide: 1 METEOSAT SECOND GENERATION (MSG) FIRE DETECTION Author:Jochen Kerkmann Contributors:P. Menzel.
Slide: 1 Version 0.3, 20 January 2004 METEOSAT SECOND GENERATION (MSG) METEOROLOGICAL USE OF THE SEVIRI HIGH-RESOLUTION VISIBLE (HRV) CHANNEL Contact:Jochen.
Version 0.6, 30 June 2004 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 04 RGB COMPOSITES WITH CHANNELS AND THEIR INTERPRETATION.
Slide: 1 Version 1.1, 30 June 2004 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) METEOROLOGICAL USE OF THE SEVIRI IR3.9 CHANNEL Author:Jochen Kerkmann.
High and low clouds, stratus, fog September 5, :45 UTCUTC South of the North Sea. On the visible image, a clouds strip (1) appears along England.
HansPeter Roesli, IntroRGB / 1 Introduction to RGB image composites HansPeter Roesli MeteoSwiss Locarno.
APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB COMPOSITES WITH CHANNEL 12 AND THEIR INTERPRETATION.
Version 0.2, 23 December 2003 Slide: 1 GOES-8 imagery on 9 May 1998 at 15:45 UTC. Channel 3 (3.9  m) useful for fire detection Fire detection using ch.
Version 1.0, 30 November 2004 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) HURRICANES AND TROPICAL CYCLONES Author:Jochen Kerkmann (EUMETSAT)
APPLICATIONS OF METEOSAT SECOND GENERATION (Meteosat-8) AIRMASS RGB Jochen Kerkmann Satellite Meteorologist, Training Officer
Visible and Infrared (IR) Weather Satellite Interpretation 1. Visible satellite images are coded from black to white according to the amount of reflected.
IntroRGB Rev Introduction to RGB image composites Author:HansPeter Roesli,
Image Interpretation for Weather Analysis Part I 21 October 2010 Dr. Steve Decker.
Image Interpretation for Weather Analysis Part 2 26 October 2010 Dr. Steve Decker.
Image Interpretation for Weather Analysis Part I 11 November 2008 Dr. Steve Decker.
Image Interpretation for Weather Analysis Part 2 27 February 2008 Dr. Steve Decker.
Incorporating Meteosat Second Generation Products in Season Monitoring Blessing Siwela SADC Regional Remote Sensing Unit November
Satellite basics Estelle de Coning South African Weather Service
Version 0.2, 16 January 2004 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) SQUALL LINES Author:Jochen Kerkmann (EUMETSAT)
Version 1.0, 30 June 2004 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 1 OVERVIEW MSG SEVIRI CHANNELS Author:Jochen Kerkmann (EUMETSAT)
Meteorolojik Uzaktan Algılamaya Giriş Erdem Erdi Uzaktan Algılama Şube Müdürlüğü 7-8 Mayıs 2012, İzmir.
Jochen Kerkmann Satellite Meteorologist, Training Officer
1 Introduction into the Solar Channels Description of characteristics and content of the channels: Ch01: 0.6  Ch02: 0.8  Ch03: 1.6  Contact person:
Applications of the SEVIRI window channels in the infrared
Example of Fog over Northern Europe  24 Feb 2004; a winter case, fog over cold snow surface  29 May 2004; fog over sea drifting ashore Pirkko Pylkkö.
Basics Satellite Meteorology ( An Introduction to RS of MSG) Joseph Kagenyi Kenya Meteorological Department.
Version 1.0, 20 April 2005 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 04 RGB COMPOSITES WITH CHANNELS AND THEIR INTERPRETATION.
MSG Red-Green-Blue(RGB) combinations Estelle de Coning South African Weather Service Most slides taken from EUMETSAT training events, Jochen Kerkmann 1.
Version 1.0, 30 November 2004 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) SQUALL LINES Author:Jochen Kerkmann (EUMETSAT)
R = Channel 03 (NIR1.6) G = Channel 02 (VIS0.8) B = Channel 01 (VIS0.6) Day Natural Colours RGB devised by: D. Rosenfeld Applications: Applications:Vegetation,
Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB COMPOSITES WITH CHANNELS AND THEIR INTERPRETATION Authors:J. Kerkmann, HP. Roesli,
Version 0.8, 03 February 2005 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB IMAGES: PART 03 CHANNEL SELECTION AND ENHANCEMENTS Author:Jochen Kerkmann.
Cloud microphysics and precipitation through the eyes of METEOSAT SECOND GENERATION (MSG) Thomas Heinemann Meteorological Products Expert
Version 1.0, 30 November 2004 Slide: 1 METEOSAT SECOND GENERATION (MSG) DUST DETECTION Author:Jochen Kerkmann Contributors:H.-J. Lutz.
1 Snow cover mapping using multi-temporal Meteosat-8 data Martijn de Ruyter de Wildt Jean-Marie Bettems* Gabriela Seiz** Armin Grün Institute of Geodesy.
Purpose To deepen your knowledge of satellite images' interpretation  Preparation for the succeeding part about summer convection.
1 Conceptual Models (CMs): Stau (Alps) Lee waves Snow How to use MSG satellite images similarities to and improvements over MTP Contact person: Veronika.
R = Channel 02 (VIS0.8) G = Channel 04r (IR3.9, solar component) B = Channel 09 (IR10.8) Day Microphysics RGB devised by: D. Rosenfeld Applications: Applications:Cloud.
METEOSAT SECOND GENERATION FROM FIRST TO SECOND GENERATION METEOSAT
UNDERSTANDING CONVECTIVE CLOUDS THROUGH THE EYES OF METEOSAT SECOND GENERATION (MSG) Jochen Kerkmann Satellite Meteorologist, Training Officer
Clouds Ice cloud detection using the 8.7  m channel: areas of ice clouds (in particular thin cirrus) are red (positive difference), clear ground and water.
Version 1.1, 02 February 2005 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) SNOW DETECTION Author:J. Kerkmann (EUMETSAT)
Detecting Lee and Barrage clouds using Meteosat 8 Contact person: Jarno Schipper Version August 2005.
Slide: 1 R = Difference WV6.2 - WV7.3 G = Difference IR3.9 - IR10.8 B = Difference NIR1.6 - VIS0.6 RGB 05-06, 04-09, ("Day Convective Storms") devised.
Version 0.3, 20 January 2004 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) DAY-TIME CONVECTION Author:Jochen Kerkmann (EUMETSAT)
Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) RGB COMPOSITES WITH CHANNELS AND THEIR INTERPRETATION Authors:J. Kerkmann, HP. Roesli,
METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION (MSG) NIGHT-TIME CONVECTION
METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION (MSG)
Best practices for RGB compositing of multi-spectral imagery
METEOSAT SECOND GENERATION (MSG) NIGHT-TIME CONVECTION
METEOSAT SECOND GENERATION (MSG)
APPLICATIONS OF METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION (MSG)
devised by: D. Rosenfeld
devised by: D. Rosenfeld
METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION
METEOSAT SECOND GENERATION (MSG)
APPLICATIONS OF METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION (MSG) OVERVIEW MSG SEVIRI CHANNELS
APPLICATIONS OF METEOSAT SECOND GENERATION (MSG)
METEOSAT SECOND GENERATION (MSG)
Presentation transcript:

Version 1.0, 14 May 2004 Slide: 1 APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) FOG DETECTION Author:Jochen Kerkmann (EUMETSAT) Contributors:H. J. Lutz (EUMETSAT), P. Pylkkö (FMI), HP. Roesli (MeteoSwiss), D. Rosenfeld (HUJ)

Version 1.0, 14 May 2004 Slide: 2 Day-time Fog over Southern Germany 24 February 2003

Version 1.0, 14 May 2004 Slide: 3 IR10.8 channel not very useful for fog detection MSG-1 24 Feb :00 UTC Channel 09 (IR10.8) =low-level fog or stratus 2=snow 3 = snow-free ground

Version 1.0, 14 May 2004 Slide: 4 Detection of fog during day-time much better with IR3.9 channel MSG-1 24 Feb :00 UTC Channel 04 (IR3.9) 1=low-level fog or stratus 2=snow 3 = snow-free ground

Version 1.0, 14 May 2004 Slide: 5 Detection of fog during day-time also good with solar component of IR3.9 MSG-1 24 Feb :00 UTC Channel 04r (IR3.9r) 1=low-level fog or stratus 2=snow 3 = snow-free ground

Version 1.0, 14 May 2004 Slide: 6 … or with the brightness temperature difference IR3.9 - IR10.8 MSG-1 24 Feb :00 UTC Difference IR3.9 - IR10.8 1=low-level fog or stratus 2=snow 3 = snow-free ground

Version 1.0, 14 May 2004 Slide: 7 Detection of fog over snow surfaces with SEVIRI NIR 1.6 channel 24 Feb 2003, 11:00 UTC High reflectance (water clouds) Lower reflectance (ice clouds) Low reflectance (snow, sea)

Version 1.0, 14 May 2004 Slide: 8 Animation 1/ =low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud) 4=lakes 4 MSG-1 24 Feb :00 UTC Channel 03 (NIR1.6) Detection of fog over snow surfaces with SEVIRI NIR 1.6 channel

Version 1.0, 14 May 2004 Slide: Animation 2/5 Detection of fog over snow surfaces with SEVIRI NIR 1.6 channel 1=low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud) 4=lakes MSG-1 24 Feb :15 UTC Channel 03 (NIR1.6)

Version 1.0, 14 May 2004 Slide: Animation 3/5 Detection of fog over snow surfaces with SEVIRI NIR 1.6 channel 1=low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud) 4=lakes MSG-1 24 Feb :30 UTC Channel 03 (NIR1.6)

Version 1.0, 14 May 2004 Slide: Animation 4/5 Detection of fog over snow surfaces with SEVIRI NIR 1.6 channel 1=low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud) 4=lakes MSG-1 24 Feb :45 UTC Channel 03 (NIR1.6)

Version 1.0, 14 May 2004 Slide: Animation 5/5 Detection of fog over snow surfaces with SEVIRI NIR 1.6 channel 1=low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud) 4=lakes MSG-1 24 Feb :00 UTC Channel 03 (NIR1.6)

Version 1.0, 14 May 2004 Slide: 13 Non-detection of fog over snow surfaces with SEVIRI VIS0.6 amd VIS0.8 channels MSG-1, 24 Feb 2004, 11:00 UTC, VIS0.8 … close-up view over the Alps

Version 1.0, 14 May 2004 Slide: 14 Non-detection of fog over snow surfaces with SEVIRI HRV channel MSG-1, 24 Feb 2004, 11:00 UTC, HRV … close-up view over the Alps

Version 1.0, 14 May 2004 Slide: 15 Recommended RGBs for Monitoring of Day-time Fog MSG-1 24 Feb :00 UTC RGB Composite R = NIR1.6 G = VIS0.8 B = VIS0.6 1=low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud)

Version 1.0, 14 May 2004 Slide: 16 Recommended RGBs for Monitoring of Day-time Fog MSG-1 24 Feb :00 UTC RGB Composite R = VIS0.8 G = IR3.9r B = IR10.8 1=low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud)

Version 1.0, 14 May 2004 Slide: 17 Recommended RGBs for Monitoring of Day-time Fog MSG-1 24 Feb :00 UTC RGB Composite R = VIS0.8 G = NIR1.6 B = IR3.9r 1=low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud)

Version 1.0, 14 May 2004 Slide: 18 MSG-1 24 Feb :45 UTC RGB Composite R = NIR1.6 G = HRV B = HRV Recommended RGBs for Monitoring of Day-time Fog 1=low-level fog or stratus 2=snow 3=thin mid-level cloud with water droplets (supercooled cloud)

Version 1.0, 14 May 2004 Slide: 19 Night-time Fog over France 14 July 2003

Version 1.0, 14 May 2004 Slide: 20 Detection of fog at night (and day) with IR3.9 - IR10.8 brightness temp. diff. MSG-1 14 July :00 UTC Difference Image IR3.9 - IR10.8 Animation 1/ =low-level fog or stratus 2=clear ground 3=high-level clouds

Version 1.0, 14 May 2004 Slide: 21 MSG-1 14 July :00 UTC Difference Image IR3.9 - IR10.8 Animation 2/ =low-level fog or stratus 2=clear ground 3=high-level clouds 3 Detection of fog at night (and day) with IR3.9 - IR10.8 brightness temp. diff.

Version 1.0, 14 May 2004 Slide: 22 MSG-1 14 July :00 UTC Difference Image IR3.9 - IR10.8 Animation 3/4 2 1=low-level fog or stratus 2=clear ground 3=high-level clouds 1 3 Detection of fog difficult at dawn/dusk ! Detection of fog at night (and day) with IR3.9 - IR10.8 brightness temp. diff.

Version 1.0, 14 May 2004 Slide: 23 MSG-1 14 July :00 UTC Difference Image IR3.9 - IR10.8 Animation 4/ =low-level fog or stratus 2=clear ground 3=high-level clouds Detection of fog at night (and day) with IR3.9 - IR10.8 brightness temp. diff.

Version 1.0, 14 May 2004 Slide: 24 Difference IR3.9 - IR10.8, 2:00 UTC HRVIS for comparison, 08:45 UTC MSG-1, 14 July 2003

Version 1.0, 14 May 2004 Slide: 25 Night-time Fog over S. Africa 24 April 2003

Version 1.0, 14 May 2004 Slide: 26 IR10.8 channel not useful for fog detection during night-time MSG-1 24 April :00 UTC Channel 09 (IR10.8) =low-level fog or stratus 2=clear ground 3 = thin mid-level clouds 4 = thick high-level clouds

Version 1.0, 14 May 2004 Slide: 27 IR8.7 channel also not useful for fog detection during night-time MSG-1 24 April :00 UTC Channel 07 (IR8.7) =low-level fog or stratus 2=clear ground 3 = thin mid-level clouds 4 = thick high-level clouds

Version 1.0, 14 May 2004 Slide: 28 IR3.9 channel also not useful for fog detection during night-time MSG-1 24 April :00 UTC Channel 04 (IR3.9) =low-level fog or stratus 2=clear ground 3 = thin mid-level clouds 4 = thick high-level clouds

Version 1.0, 14 May 2004 Slide: 29 MSG-1 24 April :00 UTC Difference Image IR3.9 - IR =low-level fog or stratus 2=clear ground 3 = thin mid-level clouds 4 = thick high-level clouds Fog at night visible in IR3.9 - IR10.8 brightness temperature difference images

Version 1.0, 14 May 2004 Slide: =low-level fog or stratus 2=clear ground 3 = thin mid-level clouds 4 = thick high-level clouds Fog at night less visible in IR8.7 - IR10.8 brightness temperature difference images MSG-1 24 April :00 UTC Difference Image IR8.7 - IR10.8

Version 1.0, 14 May 2004 Slide: 31 1=low-level fog or stratus 2=clear ground 3 = thin mid-level clouds 4 = thick high-level clouds MSG-1 24 April :00 UTC Difference Image IR IR Fog at night not visible in IR IR10.8 brightness temperature difference images

Version 1.0, 14 May 2004 Slide: 32 1=low-level fog or stratus 2=clear ground 3 = thin mid-level clouds 4 = thick high-level clouds MSG-1 24 April :00 UTC RGB Composite R = IR IR10.8 G = IR IR3.9 B = IR10.8 Recommended RGB for Monitoring of Night-time Fog

Version 1.0, 14 May 2004 Slide: 33 Night-time Fog over Central Europe 25 October 2003

Version 1.0, 14 May 2004 Slide: 34 MSG-1 25 October :00 UTC Channel 09 (IR10.8) IR10.8 channel not useful for fog detection during night-time 1=low-level fog or stratus 2=clear ground 3 = thin Cirrus clouds

Version 1.0, 14 May 2004 Slide: 35 IR8.7 channel also not useful for fog detection during night-time MSG-1 25 October :00 UTC Channel 07 (IR8.7) 1=low-level fog or stratus 2=clear ground 3 = thin Cirrus clouds

Version 1.0, 14 May 2004 Slide: 36 MSG-1 25 October :00 UTC Channel 04 (IR3.9) IR3.9 channel a bit better for fog detection during night-time, but... 1=low-level fog or stratus 2=clear ground 3 = thin Cirrus clouds

Version 1.0, 14 May 2004 Slide: 37 Fog: -8/-10 K (black) Ground: -4/-5 K (grey) … fog at night very well visible in IR3.9-IR10.8 temperature difference images MSG-1 25 October :00 UTC Difference Image IR3.9 - IR =low-level fog or stratus 2=clear ground 3 = thin Cirrus clouds 3 3

Version 1.0, 14 May 2004 Slide: 38 Fog: -4 K (dark grey) Ground: -2 K (light grey) … fog at night also well visible in IR8.7-IR10.8 temperature difference images MSG-1 25 October :00 UTC Difference Image IR8.7 - IR =low-level fog or stratus 2=clear ground 3 = thin Cirrus clouds 3 3

Version 1.0, 14 May 2004 Slide: 39 1=low-level fog or stratus 2=clear ground 3 = thin Cirrus clouds … fog at night not visible in IR12.0-IR10.8 temperature difference images MSG-1 25 October :00 UTC Difference Image IR IR

Version 1.0, 14 May 2004 Slide: 40 Recommended RGB for Monitoring of Night-time Fog MSG-1 25 Oct :00 UTC RGB Composite R = IR12.0-IR10.8 G = IR10.8-IR3.9 B = IR10.8 1=low-level fog or stratus 2=clear ground 3 = thin Cirrus clouds

Version 1.0, 14 May 2004 Slide: 41 Night-time Fog over Southern Finland 29 October 2003

Version 1.0, 14 May 2004 Slide: 42 MSG-1 29 October :00 UTC Channel 09 (IR10.8) =low-level fog or stratus 2=clear ground 3 = high-level frontal clouds 3 Fog at night not visible in IR10.8 images

Version 1.0, 14 May 2004 Slide: 43 MSG-1 29 October :00 UTC Channel 07 (IR8.7) =low-level fog or stratus 2=clear ground 3 = high-level frontal clouds 3 Fog at night not visible in IR8.7 images

Version 1.0, 14 May 2004 Slide: 44 MSG-1 29 October :00 UTC Channel 04 (IR3.9) =low-level fog or stratus 2=clear ground 3 = high-level frontal clouds 3 Fog at night hardly visible in IR3.9 images

Version 1.0, 14 May 2004 Slide: 45 MSG-1 29 October :00 UTC Difference Image IR3.9 - IR10.8 Night-time fog is not well visible in IR3.9-IR10.8 temperature difference images over Scandinavia =low-level fog or stratus 2=clear ground 3 = high-level frontal clouds 3

Version 1.0, 14 May 2004 Slide: MSG-1 29 October :00 UTC Difference Image IR8.7 - IR10.8 1=low-level fog or stratus 2=clear ground 3 = high-level frontal clouds The IR8.7-IR10.8 temperature difference images give better results for fog detection at high latitudes 3 1 3

Version 1.0, 14 May 2004 Slide: 47 MSG-1 29 Oct :00 UTC RGB Composite R = IR12.0-IR10.8 G = IR10.8-IR8.7 B = IR10.8 Recommended RGB for Monitoring of Night-time Fog at high Latitudes 1=low-level fog or stratus 2=clear ground 3 = high-level frontal clouds

Version 1.0, 14 May 2004 Slide: 48 Night-time Fog over Central Europe 5 November 2003

Version 1.0, 14 May 2004 Slide: 49 MSG-1 5 November :00 UTC Channel 04 (IR3.9) Fog at night not visible in IR window channels =low-level fog or stratus 2=clear ground 3 = high-level clouds

Version 1.0, 14 May 2004 Slide: 50 Fog at night not visible in IR window channels MSG-1 5 November :00 UTC Channel 07 (IR8.7) =low-level fog or stratus 2=clear ground 3 = high-level clouds

Version 1.0, 14 May 2004 Slide: 51 Fog at night not visible in IR window channels MSG-1 5 November :00 UTC Channel 09 (IR10.8) =low-level fog or stratus 2=clear ground 3 = high-level clouds

Version 1.0, 14 May 2004 Slide: 52 Fog: -7/-10 K (black) Ground: -4 K (grey) Fog at night well visible in IR3.9 - IR10.8 difference images MSG-1 5 November :00 UTC Difference Image IR3.9 - IR10.8 1=low-level fog or stratus 2=clear ground 3 = high-level clouds

Version 1.0, 14 May 2004 Slide: 53 Fog: -8/-10 K (black) Ground: -5 K (grey) 1=low-level fog or stratus 2=clear ground 3 = high-level clouds 3 MSG-1 5 November :00 UTC Difference Image IR3.9 - IR Fog at night also well visible in IR3.9 - IR12.0 difference images

Version 1.0, 14 May 2004 Slide: 54 Fog: -3/-4 K (dark grey) Ground: -1 K (light grey) 3 Fog at night also visible in IR8.7 - IR10.8 difference images 1=low-level fog or stratus 2=clear ground 3 = high-level clouds MSG-1 5 November :00 UTC Difference Image IR8.7 - IR

Version 1.0, 14 May 2004 Slide: 55 Fog: 0/+1 K (light grey) Ground: 0/+1 K (light grey) Fog at night not visible in difference IR IR =low-level fog or stratus 2=clear ground 3 = high-level clouds MSG-1 5 November :00 UTC Difference Image IR IR

Version 1.0, 14 May 2004 Slide: 56 MSG-1 5 November :00 UTC RGB Composite R = IR12.0-IR10.8 G = IR10.8-IR3.9 B = IR Recommended RGB for Monitoring of Night-time Fog 1=low-level fog or stratus 2=clear ground 3 = high-level clouds

Version 1.0, 14 May 2004 Slide: 57 Day-time Fog over Central Europe 5 November 2003

Version 1.0, 14 May 2004 Slide: 58 River Valley Fog as seen by Meteosat First Generation (MFG) Met-7, 5 November 2003, 08:00 UTC, VIS channel

Version 1.0, 14 May 2004 Slide: 59 MSG-1 5 November :45 UTC Channel 12 (HRV) River valley fog can be better detected with the MSG HRV channel Mosel Valley Danube Valley

Version 1.0, 14 May 2004 Slide: 60 Kaiserstuhl (557 m) … and the MSG HRV channel gives more details MSG-1 5 November :45 UTC Channel 12 (HRV)

Version 1.0, 14 May 2004 Slide: 61 1=low-level fog or stratus 2=clear ground 3 = high-level clouds 4 = snow MSG-1 5 November :00 UTC RGB Composite R = NIR1.6 G = VIS0.8 B = VIS0.6 Recommended RGBs for Monitoring of Day-time Fog

Version 1.0, 14 May 2004 Slide: 62 1=low-level fog or stratus 2=clear ground 3 = high-level clouds 4 = snow MSG-1 5 November :00 UTC RGB Composite R = VIS0.8 G = IR3.9r B = IR10.8 Recommended RGBs for Monitoring of Day-time Fog

Version 1.0, 14 May 2004 Slide: 63 1=low-level fog or stratus 2=clear ground 3 = high-level clouds 4 = snow MSG-1 5 November :00 UTC RGB Composite R = VIS0.8 G = NIR1.6 B = IR3.9r Recommended RGBs for Monitoring of Day-time Fog

Version 1.0, 14 May 2004 Slide: 64 1=low-level fog or stratus 2=clear ground 3 = high-level clouds 4 = snow MSG-1 5 November :45 UTC RGB Composite R = HRV G = HRV B = IR3.9i Recommended RGBs for Monitoring of Day-time Fog

Version 1.0, 14 May 2004 Slide: 65 Night-time Fog over Europe 9 November 2003

Version 1.0, 14 May 2004 Slide: 66 MSG-1 09 November :15 UTC Channel 04 (IR3.9) Fog at night not visible in IR window channels =low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds

Version 1.0, 14 May 2004 Slide: 67 Fog at night not visible in IR window channels MSG-1 09 November :15 UTC Channel 07 (IR8.7) =low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds

Version 1.0, 14 May 2004 Slide: 68 Fog at night not visible in IR window channels MSG-1 09 November :15 UTC Channel 09 (IR10.8) =low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds

Version 1.0, 14 May 2004 Slide: 69 Fog: -7/-10 K (black) Ground: -4/-5 K (grey) Fog at night visible in IR3.9 - IR10.8 difference images MSG-1 09 November :15 UTC Difference Image IR3.9 - IR10.8 1=low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds Animation 1/6

Version 1.0, 14 May 2004 Slide: 70 Fog: -7/-10 K (black) Ground: -4/-5 K (grey) MSG-1 09 November :15 UTC Difference Image IR3.9 - IR10.8 1=low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds Animation 2/6 Fog at night visible in IR3.9 - IR10.8 difference images

Version 1.0, 14 May 2004 Slide: 71 Fog: -7/-10 K (black) Ground: -4/-5 K (grey) MSG-1 09 November :15 UTC Difference Image IR3.9 - IR10.8 1=low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds Animation 3/6 Fog at night visible in IR3.9 - IR10.8 difference images

Version 1.0, 14 May 2004 Slide: 72 Fog: -3/-4 K (grey) Ground: -4/-5 K (grey) Fog at dawn/dusk not visible in IR3.9 - IR10.8 difference images MSG-1 09 November :15 UTC Difference Image IR3.9 - IR10.8 Animation 4/6 1=low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds

Version 1.0, 14 May 2004 Slide: 73 Fog: +2/+6 (light grey) Ground: -4/-5 K (dark grey) MSG-1 09 November :15 UTC Difference Image IR3.9 - IR10.8 1=low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds Animation 5/6 Fog at daytime visible in IR3.9 - IR10.8 difference images

Version 1.0, 14 May 2004 Slide: 74 Fog: +6/+12 (light grey) Ground: -2/-3 K (dark grey) MSG-1 09 November :15 UTC Difference Image IR3.9 - IR10.8 1=low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds Animation 6/6 Fog at daytime visible in IR3.9 - IR10.8 difference images

Version 1.0, 14 May 2004 Slide: 75 Fog: -3/-4 K (black) Ground: -1/-2 K (grey) Fog at night also visible in difference IR8.7 - IR10.8 MSG-1 09 November :15 UTC Difference Image IR8.7 - IR10.8 1=low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds

Version 1.0, 14 May 2004 Slide: 76 Fog: 0/+1 K Ground: 0/+1 K Ocean: -1 K Fog at night not visible in difference IR IR =low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high-level clouds MSG-1 09 November :15 UTC Difference Image IR IR10.8

Version 1.0, 14 May 2004 Slide: 77 MSG-1 9 November :15 UTC RGB Composite R = IR12.0-IR10.8 G = IR10.8-IR3.9 B = IR Recommended RGB for Monitoring of Night-time Fog 1=low-level fog or stratus 2=cold clear ground 3 = warm clear ground (mountains) 4 = thin, high level clouds

Version 1.0, 14 May 2004 Slide: 78 Day-time Fog over Europe 9 November 2003

Version 1.0, 14 May 2004 Slide: 79 Low Stratus and River Valley Fog as seen by MFG Met-7, 9 November 2003, 08:00 UTC, VIS channel

Version 1.0, 14 May 2004 Slide: 80 MSG HRV channel gives more details on the fog... MSG-1 9 November :15 UTC Channel 12 (HRV) River Valley Fog Fog/low stratus

Version 1.0, 14 May 2004 Slide: 81 MSG-1 9 November :15 UTC Channel 12 (HRV) Fog/Low stratus with Gravity Waves … closer look at Denmark

Version 1.0, 14 May 2004 Slide: 82 MSG-1 9 November :15 UTC RGB Composite R = NIR1.6 G = VIS0.8 B = VIS0.6 Recommended RGBs for Monitoring of Day-time Fog =low-level fog or stratus 2=clear ground 3 = high-level thick clouds 4 = high-level thin clouds 5 = snow

Version 1.0, 14 May 2004 Slide: 83 1=low-level fog or stratus 2=clear ground 3 = high-level thick clouds 4 = high-level thin clouds 5 = snow MSG-1 9 November :15 UTC RGB Composite R = VIS0.8 G = IR3.9r B = IR10.8 Recommended RGBs for Monitoring of Day-time Fog

Version 1.0, 14 May 2004 Slide: 84 MSG-1 9 November :15 UTC RGB Composite R = VIS0.8 G = NIR1.6 B = IR3.9r Recommended RGBs for Monitoring of Day-time Fog =low-level fog or stratus 2=clear ground 3 = high-level thick clouds 4 = high-level thin clouds 5 = snow 4 4 4

Version 1.0, 14 May 2004 Slide: 85 MSG-1 9 November :15 UTC RGB Composite R = HRV G = HRV B = IR3.9 - IR10.8 Recommended RGBs for Monitoring of Day-time Fog =low-level fog or stratus 2=clear ground 3 = high-level thick clouds 4 = high-level thin clouds 5 = snow

Version 1.0, 14 May 2004 Slide: 86 Night-time Fog over Central Europe 11 November 2003

Version 1.0, 14 May 2004 Slide: Sea surface 2. Land surface 3. Warm fog 4. Cool fog + stratus (-3 o C) 5. Supercooled water stratus (-13 o C) 6. Highly supercooled water stratus (-18 o C) 7. Cb with lightning 8. Thick cirrus 9. Thin cirrus MSG-1 11 Nov :00 UTC RGB Composite R = IR IR10.8 G = IR IR3.9 B = IR10.8 Recommended RGB for Monitoring of Night-time Fog

Version 1.0, 14 May 2004 Slide: Recommended RGB for Monitoring of Night-time Fog MSG-1 11 Nov :00 UTC Difference Image R = IR IR Sea surface 2. Land surface 3. Warm fog 4. Cool fog + stratus (-3 o C) 5. Supercooled water stratus (-13 o C) 6. Highly supercooled water stratus (-18 o C) 7. Cb with lightning 8. Thick cirrus 9. Thin cirrus

Version 1.0, 14 May 2004 Slide: MSG-1 11 Nov :00 UTC Difference Image G = IR IR Sea surface 2. Land surface 3. Warm fog 4. Cool fog + stratus (-3 o C) 5. Supercooled water stratus (-13 o C) 6. Highly supercooled water stratus (-18 o C) 7. Cb with lightning 8. Thick cirrus 9. Thin cirrus Recommended RGB for Monitoring of Night-time Fog

Version 1.0, 14 May 2004 Slide: MSG-1 11 Nov :00 UTC Difference Image B = IR Sea surface 2. Land surface 3. Warm fog 4. Cool fog + stratus (-3 o C) 5. Supercooled water stratus (-13 o C) 6. Highly supercooled water stratus (-18 o C) 7. Cb with lightning 8. Thick cirrus 9. Thin cirrus Recommended RGB for Monitoring of Night-time Fog

Version 1.0, 14 May 2004 Slide: 91 Day-time Fog over the Po Valley 20 November 2003

Version 1.0, 14 May 2004 Slide: 92 MSG-1, 20 November 2003, 11:00 UTC, HRV Channel

Version 1.0, 14 May 2004 Slide: 93 Night Fog darker than clear ground Dawn Fog and clear ground equal Day Fog brighter than clear ground 1 to 2 critical slots at dawn/dusk MSG-1, 20 November 2003 Difference IR3.9 - IR10.8

Version 1.0, 14 May 2004 Slide: 94 MSG-1, 20 November 2003, 00:00 UTC, IR3.9 - IR10.8 Click on the icon to see the animation (00:00-15:00 UTC, AVI, KB) !

Version 1.0, 14 May 2004 Slide: 95 SUMMARY

Version 1.0, 14 May 2004 Slide: 96 VIS0.6 and HRVIS: to disciminate between fog and ground (fog white, ground dark)VIS0.6 and HRVIS: to disciminate between fog and ground (fog white, ground dark) VIS0.8: less useful because of less contrast to vegetated areasVIS0.8: less useful because of less contrast to vegetated areas NIR1.6 and IR3.9: to discriminate between fog and snow (fog high reflectivity, snow low reflectivity)NIR1.6 and IR3.9: to discriminate between fog and snow (fog high reflectivity, snow low reflectivity) IR3.9 - IR10.8: fog large positive values; clear ground around 0 K (-5 K to +5 K)IR3.9 - IR10.8: fog large positive values; clear ground around 0 K (-5 K to +5 K) Detection of Fog/Low Stratus during Daytime

Version 1.0, 14 May 2004 Slide: 97 RGB : fog white-pinkish; clear ground greenish or reddish (depending in vegetation)RGB : fog white-pinkish; clear ground greenish or reddish (depending in vegetation) RGB : fog white-pinkish; clear ground reddishRGB : fog white-pinkish; clear ground reddish RGB 02-04r-09: fog white-pinkish; clear ground blueishRGB 02-04r-09: fog white-pinkish; clear ground blueish RGB r: fog whitish, clear ground greenish- bluishRGB r: fog whitish, clear ground greenish- bluish Detection of Fog/Low Stratus during Daytime

Version 1.0, 14 May 2004 Slide: 98 IR3.9-IR10.8: fog -10/-7 K; clear ground around -4 K (difficulties at high latitudes)IR3.9-IR10.8: fog -10/-7 K; clear ground around -4 K (difficulties at high latitudes) RGB / / 09: fog light greenish-yellowish; clear ground dark pinkishRGB / / 09: fog light greenish-yellowish; clear ground dark pinkish Detection of Fog/Low Stratus during Nighttime (Low and Mid Latitudes)

Version 1.0, 14 May 2004 Slide: 99 Detection of Fog/Low Stratus during Nighttime (High Latitudes) IR8.7-IR10.8: fog -4 K, clear ground around -1/-2 KIR8.7-IR10.8: fog -4 K, clear ground around -1/-2 K RGB / / 09: fog light greenish-yellowish; clear ground dark pinkishRGB / / 09: fog light greenish-yellowish; clear ground dark pinkish

Version 1.0, 14 May 2004 Slide: 100 IR3.9-IR10.8: fog detection difficult because of compensating effects (fog colder in IR3.9 than in IR10.8 because of lower emissivity, but reflection of solar radiation)IR3.9-IR10.8: fog detection difficult because of compensating effects (fog colder in IR3.9 than in IR10.8 because of lower emissivity, but reflection of solar radiation) IR8.7-IR10.8: fog -4 K, clear ground around -1/-2 K (only small difference between fog and clear ground, but works also at dawn/dusk)IR8.7-IR10.8: fog -4 K, clear ground around -1/-2 K (only small difference between fog and clear ground, but works also at dawn/dusk) Detection of Fog/Low Stratus at Dawn/Dusk

Version 1.0, 14 May 2004 Slide: 101 Detection of Fog/Low Stratus: Conclusion Less noisy than the difference IR3.9 - IR10.8 (works well also over Scandinavia)Less noisy than the difference IR3.9 - IR10.8 (works well also over Scandinavia) 24-hour capability with "constant" colour for fog/low stratus (unlike IR3.9-IR10.8 difference)24-hour capability with "constant" colour for fog/low stratus (unlike IR3.9-IR10.8 difference) High-level Cirrus above fog/low stratus can also be detected (combined with IR12.0-IR10.8 difference)High-level Cirrus above fog/low stratus can also be detected (combined with IR12.0-IR10.8 difference) In operational applications, the difference IR8.7-IR10.8 may be the best to detect fog/low stratus (day- and night), because of:

Version 1.0, 14 May 2004 Slide: 102 MSG-1, 9 November 2003, 00:15 UTC, Difference Image, IR8.7 - IR10.8 Click on the icon to see the animation (00:15-08:15 UTC, AVI, KB) !