Navigation camera on-orbit calibration method based on single fixed star observation and singular value decomposition

The invention discloses a navigation camera on-orbit calibration method based on single fixed star observation and singular value decomposition. The detector maneuvers the attitude to a target imaging attitude, and a single high-brightness target fixed star is located in the field of view of the navigation camera and is close to the edge. The navigation camera images the target fixed star, and after image processing, the unit direction vector of the target fixed star in the measurement system of the navigation camera is identified. And meanwhile, the star sensor images the star sky, and predicts the unit direction vector of the target fixed star in the system of the detector. And multiplying the unit direction vector of the target fixed star in the navigation camera measurement system by the transpose of the unit direction vector of the target fixed star in the detector body system, and then accumulating into a measurement information accumulation matrix. After multiple times of measurement in the same imagin