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Lw8:tt?l riccuracy<br />

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Normal Modc Control Cunccpls<br />

-<br />

MOS-1 ( Mu~c Pointing Dircctioa: 0.1" Two bias momentum wheels in V-<br />

Observation Satellite) Stability 0.00l0/sec arrangement with magnetic unloading<br />

of accumulated angular momentum<br />

ROSAT Pointing mode: 3' Reaction wheel control with ma-<br />

(Rontgen-SateUite) Meas.Accuracy: 10" gnetic unloading of accumulated<br />

San Mode: 3' angular momentum<br />

ASTRO-SPAS Pointing moue: S* Riorf body control with cold gas<br />

(Shuttle Pallet Satellite) Scan Mode: 80" 1.' : of GPS for Earth ref. frame<br />

determination<br />

EURECA 0.9" cach axis for Cold gas control supported by<br />

normal mode magnetic control with disturbance<br />

torque compensation<br />

-<br />

Tablc 3.14: EartWscientific satclliie AOCS fcatures and performance (DASA-AOCS)<br />

Tablc 3.2-1: Typical characteristics of attitudc mcasurcment equipment<br />

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Manufact wer<br />

FERRAKn<br />

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2.1 - 2 TPD<br />

GALLEO<br />

DASA<br />

WO. baffle<br />

DASA

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