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| Overview:
Sun pointing spacecraft, spin stabilized at 15 RPM |
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| Detail:
-Autonomous sun acquisition and spin-up from any orientation -On-orbit inertia adjustment aligns imager with spin axis -On-orbit mass properties adjustment direct sun pointing error measurement to ~0.05 degrees -Magnetic torqrods used for all control -Sun pointing (precession) control to <0.2 degrees -Spin rate stability to <4.5 arcseconds per second |
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