在对卫星或飞行器进行姿态控制时，需用敏感器进行姿态测量。红外地球敏感器通过测量局地垂线获得姿态信息。根据线阵红外地球敏感器产品的特点进行算法设计，通过像元细分的方式提高测量精度，通过多工作模式选择的方式拓展应用环境。在产品上落实软件设计和实现，并进行测试。测试结果表明,该算法具有提高测量精度和增加使用环境可适应性等特点，对于地球敏感器适应微小卫星发展、提供高精度姿态以及实现天文导航等具有重要的推进作用。

When the attitude of a satellite or a flight vehicle is to be controlled, attitude measurement should be carried out by a sensor. Infrared earth sensors can obtain the attitude information by measuring local vertical lines. According to the characteristics of a linear-array infrared earth sensor, an algorithm is designed. In the algorithm, the measurement accuracy is improved through the subdivision of pixels and the application environment is expanded through the selection of multi operating modes. Software design and test are implemented on the product. The test results show that the algorithm has the characteristics of improving measurement accuracy and enhancing the adaptability to operating environment. It has an important promotion function for adapting earth sensors to the development of microsatellites, providing high accuracy attitude and implementing celestial navigation etc.