# Research on Space Targets Simulation Modulation Algorithm Combined Global–Local Multi-Spectral Radiation Features

## TL;DR

This paper introduces a new algorithm for simulating multi-spectral space targets by combining global and local radiation features, improving simulation accuracy.

## Contribution

The novel contribution is a multi-spectral space target simulation modulation algorithm integrating global and local radiation features.

## Key findings

- The algorithm achieves non-uniformity better than 3.78% and global simulation error better than −4.56%.
- Local simulation error is better than 4.25%, making it one of the few algorithms combining global and local features effectively.
- The algorithm supports performance testing and enhances semi-physical simulation for optical loads.

## Abstract

To solve the international problem of global–local radiation features simulation of multi-spectral space targets, this paper proposes a multi-spectral space target simulation modulation algorithm that can combine global–local spectral radiation features. An overall architecture of a series-parallel multi-source information fusion space target simulation system (MITS) is constructed, and a global–local multi-spectral radiation feature modulation link is built. A multi-spectral feature modulation algorithm consisting of three modules, including optical engine non-uniformity compensation, global spectral radiant energy modulation, and local radiant grayscale modulation, is designed, and an experimental platform is built to verify the correctness and advancement of the proposed algorithm. The results indicate that the non-uniformity is better than 3.78%, the global simulation error is better than −4.56%, and the local simulation error is better than 4.25%. It is one of the few multi-spectral target simulation modulation algorithms worldwide that can combine the global whole and local details. It supports the performance test and technology iteration of multi-spectral optical loads. It helps to supplement the theoretical system of multi-spectral space target simulation and enhance the ground-based semi-physical simulation link of optical loads.