McIDAS Programmer's Manual
Version 2015

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Meteosat Second Generation (MSG) Level 1.5

Meteosat Second Generation (MSG) images are remapped and calibrated at the ground station before the stretched signal is disseminated. This simplifies the navigation and calibration data sections. All data is sixteen bits; each band is stored in a separate file.

 

For more information on Meteosat labels and headers, see the EUMETSAT document Meteosat High Resolution Image Dissemination (pdf).

MSG directory block

Word Value Description

3

51

MSG-1

14

 

11

1

Number of Bands

bands 1-11 are present

band 12 is present

19

Band bit map

Bit Band Wavelength Description
    (µm)  
0 1 0.6 Visible cloud and surface features
1 2 0.8 Visible aerosols over water, vegetation
2 3 1.6 Near-Infrared Surface, cloud phase
3 4 3.9 Infrared low-level cloud/fog, fire detection
4 5 6.2 Infrared upper-level water vapor
5 6 7.3 Infrared mid-level water vapor
6 7 8.7 Infrared total water, cloud phase, dust
7 8 9.7 Ozone
8 9 10.8 Infrared surface/cloud-top temperature
9 10 12.0 Infrared surface/cloud temperature, low-level water vapor
10 11 13.4 Infrared CO2; cloud heights
11 12 0.7 Broadband visible (0.4 - 1.1 μm)

Bands 1-11 are low resolution images (3 km) with a center latitude/longitude point of (0,0).

Band 12 is a high resolution visible image (1 km) which has a southern and northern data block offset from each other. The center latitude/longitude point is (0,2).

52

MSG

image source type; 4 bytes ASCII

53

RAW

calibration type; 4 bytes ASCII

MSG data block

For the line data, each value is transmitted as sixteen bits and is stored east to west and south to north in the original files.

MSG navigation block

An MSG navigation block is divided into 128 words.

Word Value Description

1

MSG

navigation type

2 - 128

0

reserved

MSG calibration block

An MSG calibration block is divided into 128 words.

Word Value Description

1

*

central wave number #1 (IR channels 3-11)

2

*

central wave number #2 (IR channels 3-11)

3

*

gain (channels 1-3,12)

4

*

offset (channels 1-3,12)

5-128

0

reserved

* values stored as 4 ASCII F10.6 characters separated by a space character.

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