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ATTITUDE CONTROL TECHNIQUE COMPARISON
TYPE | COST | ACCURACY | MISSIONS | COMMENTS |
3-AXIS ACTIVE CONTROL
|
VERY HIGH | .007 ARC-SECONDS–1.0 DEG. | ASTRONOMICAL, WEATHER | VIBRATIONS AT HIGH RPM'S MAY REDUCE ACCURACY |
|
VERY HIGH | .1–1.0 DEG | DEEP SPACE | FUEL LIMITED |
SPIN STABILISATION | LOW TO MODERATE | .1–2.0 DEG. | EARTH ORB, INTERPLANETARY | SPIN RATE AND DIRECTION REQUIRE CONTROL |
DUAL-SPIN STABILIASATION
|
HIGH | .01–.1 DEG. | GEOSYNCH. COMMS. SATELLITES | REQUIRES COMPLEX ELEC. AND MECH. CONNECTIONS |
|
HIGH | .01–.1 DEG. | GEOSYNCH. COMMS. SATELLITES | HIGH TECHNOLOGY REQUIREMENTS |
MAGNETIC STABILIZATION | VERY LOW | 10–20 DEG. | LOW ALT., SCIENTIFIC | REQUIRES A MAGNETIC FIELD |
GRAVITY-GRADIENT STABILIZATION | LOW | 1.0–10 DEG. | CIRCULAR, LOW ALT. | REQUIRES A GRAVITY FIELD AND A LARGE MOMENT OF INTERTIA FOR SATELLITE |