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With the ever-increasing resolution of spatial solar imaging observations, it is difficult to achieve high-resolution observation requirements relying solely on the stability of satellite platforms. Advanced solar observation instruments need to be equipped with high-performance image stabilization systems such as SOHO, TRACE, STEREO, SDO, etc. Most of the imaging instruments on the solar observation satellites have an image stabilization system. The image stabilization system is composed of two parts: a fine solar sensor and a yaw mirror. The fine solar sensor is the core of stabilizing image stabilization, and its resolution size directly affects the stabilizing effect.
At present, many domestic solar observation satellites are conducting demand demonstration or key technologies. In order to meet satellite payload requirements, the Chinese Academy of Sciences' Space Science and Applied Research Center has developed a polar imaging instrument with a resolution of 1.9 arcsec and an X-ray imager with a resolution of 2.5 arcsec, and a Lyman-alpha imager with a resolution of 1.4 arcsec. Acceptance will also be completed by mid-2015.
In order to meet the image stabilization needs of these high-resolution imaging instruments in orbit, the research team led by Space Center researcher Li Baoquan has successfully exploited key technologies such as low-noise electronics and polynomial position recognition algorithms using the new position-sensitive sensors. Resolution of fine sun sensor prototypes (HASS). The precision solar sensor has a working wavelength of 782 nm, an angular resolution of 0.15 arcsec, an angle of field of view of 95 arcmin, a weight of 120 g, a power consumption of less than 0.13 W, a sampling rate of 550 Hz, and a maximum size of 160 mm×60 mm×40 mm. This instrument is currently the world's highest resolution fine sun sensor.
The successful development of a precision solar sensor has laid a good technical foundation for the development of advanced observation satellites for Japan or high-resolution solar imaging instruments. At the same time, the instrument's high position sensitivity (position identification is about 70 nm) can also be used for two. The measurement of micro-displacement between bodies or the measurement of the fine rotation angle between two bodies can also play a key role in the formation of the satellite formation, the attitude measurement of a long stretched arm, and so on.
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