Abstract: To obtain the current attitude of the satellite in attitude control of CubeSat, a digital sun sensor for CubeSat is designed. Through the linear CCD(Charge Coupled Device) and the corresponding slit-type optical path design, the double-angle measurement of the point light source relative to the normal line of the installation plane is achieved, and the design index of the field of view angle of 40° and the theoretical measurement accuracy of 0. 01° is achieved. The sun sensor uses commercial off-the-shelf products and technologies (COTS: Commercial Off-The-Shelf), and has the characteristics of small size, low power consumption, simple design, high stability, and easy integration. As a COTS resource that satisfies the geometric dimensions of the CubeSat circuit board, it has potential application value in the future development of the CubeSat and plays a vital role in the further research of other CubeSats.

Key words: sun sensor, CubeSat, commercial off-the-shelf(COTS)