McIDAS Programmer's Manual
Version 2003
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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.
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 |
.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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