| 近地空间短波红外恒星探测信噪比分析方法 |
| |
| 作者姓名： | 汪洪源 王秉文 毛晓楠 |
| |
| 作者单位： | 哈尔滨工业大学空间光学工程研究中心;哈尔滨工业大学空间光学工程研究中心；
上海航天控制技术研究所 |
| |
| 基金项目： | 国家自然科学基金（61705220） |
| |
| 摘 要： | 针对星敏感器在近地空间导航应用需求，开展了短波红外恒星探测信噪比分析方法研究。基于恒星目标与天空背景辐射特性，构建了恒星探测信噪比模型，并结合光学系统及图像传感器参数完成了仿真试验。结果表明，同一星等及太阳天顶角下，Ks波段下的恒星探测信噪比最大，H波段次之，J波段最小；同一太阳天顶角及波段下，星等越小，恒星探测信噪比越大；同一星等及波长下，太阳天顶角越大，即恒星与太阳之间角距越大，恒星探测信噪比越大。本文可为新一代近地空间全天时星敏感器系统的方案设计、指标论证、评估应用提供可靠的理论方法与技术支持。
|
| 关 键 词： | 恒星探测 信噪比 近地空间 短波红外 星敏感器 |
Method of SNR Analysis for Near-Ground SWIR Star Detection |
| |
| Authors: | WANG Hongyuan WANG Bingwen MAO Xiaonan |
| |
| Institution: | Research Center for Space Optical Engineering, Harbin Institute of Technology; Research Center for Space Optical Engineering, Harbin Institute of Technology,;
Shanghai Aerospace Control Technology Institute |
| |
| Abstract: | The short-wave infrared (SWIR) star detection signal-to-noise ratio (SNR) analysis method is studied to meet the navigation application requirements of star trackers in the near-ground. The SNR is constructed based on the radiation characteristics of the stellar target and sky background. The simulation experiment is completed by combining the optical system and detector parameters. The results show that the SNR is the largest in the Ks-band, followed by H-band, and the smallest in J-band for the same magnitude and solar zenith angle. The SNR of magnitude 4 is higher than magnitude 6 for the same zenith angle and band. The more significant the solar zenith angle, also the greater the angular distance between the star and the sun, and the greater the SNR for the same magnitude and band. It can provide reliable theoretical methods and technical support for the scheme design, index demonstration, and application evaluation of a new generation near-earth space all-day star tracker. |
| |
| Keywords: | star detection SNR near-ground short-wave infrared star tracker |
|
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
