| 摘要 |
An infrared sensor carried aboard a satellite is driven to conically scan the horizon of the celestial body, such as the earth, about which the satellite is orbiting. The output of the sensor is a signal whose amplitude is constant when the satellite is in its nominal attitude and whose amplitude varies sinusoidally if the satellite attitude deviates from nominal. This output from the sensor is combined with signals responsive to the scan drive mechanism uniquely defining the scan angle, so as to produce output signals indicating pitch and roll of the satellite.
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