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SATELLITE
The VEGETATION two instruments are passengers on board SPOT4 and SPOT5 satellites.
The VEGETATION two instruments are nearly identical. The only differences are:
 A few improvements of the optics: minimization of the stray light and modification of the SWIR sensor (Short Wave InfraRed).
Improvement of the calibration system: supply of a reliable ground reference.
Modification of the attitude restitution: SPOT5 winding.
Use of 'star tracker' which ensures accurate location without Ground Control Points.
Simultaneous acquisition on May 6, 2002
A few characteristics of VEGETATION instrument:
| Mass |
160 kg |
| Size |
0.7 x 1.0 x 1.0 m³ |
| Consumption |
< 200 W |
| Reliability |
redonden equipments |
| 4 cameras |
CCD + telecentric objective |
| 4 spectral bands |
Blue (B0), red (B2), near infrared (B3) and short wave infrared (SWIR) |
| Swath |
2250 km |
| Nearly constant resolution in the field of view |
| High geometric quality (no scanning mechanism) |
| Long integration time -> very good Signal/Noise ratio |
| Single video electronics |
| Calibration device |
| Mass memory |
2.25 Go |
| On board calculator (autonomous management) |
| X-band transmission chain |
| L-band transmission chain + dedicated antenna |
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SCIENCE
GROUND SEGMENT
APPLICATIONS
