McIDAS Programmer's Manual

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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 .

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
    (µ m)  
0 1 .635 Daytime cloud detection
1 2 0.81 Surface water and vegetation
2 3 1.64 Ice/water cloud detection
3 4 3.92 Sea surface temperature, hot spot detection
4 5 8.7 Ice/water, cloud detection
5 6 10.8 Cloud detection, surface temperature
6 7 12.0 Sea surface temperature, soil moisture
7 8 6.25 Water vapor
8 9 7.35 Water vapor
9 10 9.66 Ozone absorption
10 11 13.4 CO2 absorption
11 12 0.7 Broad band visible (high resolution)

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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