FIELD: measurement technology; spacecraft body-axis systems. SUBSTANCE: device has scanning drive, scanning element, two position sensors, optical system, two radiation detectors whose instant fields of vision are relatively coaxial, two amplifiers, pulse system setting element, controlled integrating unit, data computing unit, switching unit, and sun presence storage unit. Angular dimensions of instant field of vision of one radiation detector is greater than that of second radiation detector by recorded gap. EFFECT: improved informative capacity of measurements. 2 dwg
