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GRAS performance
Measured temperature accuracy
1K
Number of occultation channels (set + rise)
4
Number of navigation channels
8
Number of occultations per day
500
Horizontal resolution
100 to 300 km
Vertical resolution Fresnel zone
(stratosphere, troposphere)
300 to 1500 m
High Vertical resolution (troposphere)
100 m
Navigation solution accuracy
100 m
USO frequency stability
1 x 10
-12
Bending angle budget @ 30 km
0.42
m
rad
Mass
26 kg
Power
37 W
Data rate (mean, max)
27 kb/s
60 kb/s
Occultation antennas
Gain
9 to 10 dBi
Elevation angle
-25.5 to -28.3°
Azimuth angle
± 55°
Navigation antenna
Gain
-4 to +7 dBi
Elevation angle
15 to 90°
Azimutz angle
360°
Last update: 28 June 2006
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In depth
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About GRAS
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Description
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Instrument design
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Products
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Calibration/validation
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Ground Processor Prototype
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