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Flow Chart

Acquisition Mode: Establishes desired spin rate and damps transverse rates 

Precession Mode: Establishes Sun-pointing orientation 

Normal Mode: Maintains Sun-pointing orientation and nominal spin rate; encompasses fine precession, nutation, and spin rate control 

Spin Mode: Establishes desired spin rate 

Idle Mode: Disables control until ground intervention 

Balance Operations: Balances spacecraft LADs to obtain pure Imager axis 


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L. Garcia