Traditional star sensors and emerging attitude navigation sensors face increasing limitations in calibration techniques. Current methodologies inadequately address complex space environment simulation requirements, high-precision calibration standards, and rapid testing needs for large-scale constellations (e.g., the Qianfan Constellation Project). This research presents a region-partitioned star-point independent modulation stellar simulation system for generating authentic star maps with precise stellar colors. The system enables independent spectral and energy modulation for individual star points, offering an alternative to conventional star observation tests and advanced calibration capabilities for next-generation navigation devices.

The research began with an analysis of the minimum modulation rate necessary for stellar spectral modulation, followed by the derivation of theoretical modulation rates meeting spectral simulation accuracy requirements. Based on predetermined digital micromirror device (DMD) partitioning criteria, the DMD was segmented accordingly. The system architecture incorporated a cylindrical collimating beam expansion system and a three-region independent modulation optical system. Image quality assessment confirmed the production of flat, curvature-free spot shapes and achieved spectral resolution exceeding 5 nm across the spectral plane, validating the system's capacity for accurate spectral modulation and simulation.

Performance tests utilized an established experimental platform. Initial modulation capability assessment revealed a maximum full width at half maximum (FWHM) of 4.61 nm for monochromatic light output, satisfying the 5 nm spectral resolution requirement. Spectral simulation accuracy test across three regions employed target values of 3000 K, 5000 K, 7000 K, and 9000 K. Results indicated a maximum spectral simulation error of 7.2% across regions, with inter-region consistency variations below 1.8%. Independent spectral modulation verification assigned sub-regions 1, 2, and 3 to simulate 3000 K, 7000 K, and 9000 K, respectively, yielding spectral simulation errors of 4.7%, 4.8%, and 4.3%. These findings demonstrate the system’s effectiveness in achieving precise, independent spectral control for multiple star simulations.

This research establishes a region-partitioned modulation methodology for star map simulation, facilitating precise spectral control of individual star points. Experimental validation confirmed high accuracy (<7.5% error) and consistency (<1.8% deviation) across a 3000?9000 K range. The system demonstrates capability in simulating three stars with arbitrary color temperatures, indicating its potential as a replacement for traditional star observation tests. This technology advances calibration solutions for future navigation systems while reducing calibration complexity and testing duration, supporting efficient star sensor mass production.