INSTRUMENT OF THREE-AXES SUN ORIENTATION Russian patent published in 1999 - IPC

FIELD: orientation systems of spacecraft. SUBSTANCE: unit of orientation around axis directed to the Sun is mounted on platform of single-degree-of-freedom servo system uniaxially to sensor of the Sun. This unit has filters, diaphragm with three holes placed in focal plane of objective, modulator, two photodetectors, bundles of light guides, four amplifiers, demodulators and flip-flops. Platform is anchored in single-degree-of- freedom gimbal suspension having motors, reduction gears and devices measuring angle of turn of output shafts of reduction gears. EFFECT: provision for unambiguous measurements of angles around directions to the Sun. 2 cl, 14 dwg