Abstract
Stand testing of an autonomous optical navigation system for operation in circumlunar orbits and during Earth-Moon transfer was performed. The system includes a wide-angle navigation camera for estimation of spacecraft position using observations of the planet’s horizon and of ground control points on its surface, a narrow-angle navigation camera for refinement the SC position using ground control points in higher resolution images, and two star trackers for determination of system orientation. The navigation software was also tested using the image of the lunar surface obtained by the television system STS-L installed on the Luna-25 spacecraft. All the control points from the developed catalog that were located in the imaged area were confidently recognized. The diversion in the spacecraft coordinates as obtained from the optical navigation measurements and from the ballistic forecast was within the expected measurement and forecast errors.