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Program: Cluster

European scientific program. The 4 satellites composing it were lost on Ariane 5's maiden flight.


Designation n/a
Launch date 4 Jun 1996
Country of origin Europe
Mission Scientific: Sun study
Launch vehicle Ariane V88

The total cost was evaluated at 440 million Euros.

External resources


Technical data


Prime contractor Astrium (was Dornier)
Mass at launch 1200 kg
Payload mass 72 kg
Propellant mass 650 kg
Dry mass 550 kg
Diameter 2.9 m
Height 1.3 m
Solar array  
Stabilization spin stabilized (15 rpm)
DC power EOL: 224 W (80 Ah silver cadmium batteries)
Payload power 47 W
Design lifetime 2 years
Telemetry 2-262 kbps

Tape recorder capacity: 1 gbit The final orbit was to be 25000/140000 km


Cluster 1 2242.000 MHz
Cluster 2 2249.000 MHz
Cluster 3 2277.000 MHz
Cluster 4 2270.000 MHz


STAFF ( Spatio-Temporal Analysis of Field Fluctuations)
EFW (Electric Fields and Waves)
WHISPER (Waves of High frequency and Sounder for probing of density by Relaxation)
WBD (Wide Band Data)
DWP (Digital Wave Processor)
FGM (Fluxgate Magnetometer)
EDI (Electronic Drift Instrument)
CIS (Cluster Ion Spectrometry)
PEACE (Plasma Electron And Current Analyser)
RAPID (Research with Adaptive Particle Imaging Detectors)
ASPOC (Active Spacecraft Potential Control)

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