Designing considerations for airborne star tracker during daytime

The 27th Chinese Control and Decision Conference (2015 CCDC) Pub Date : 2015-05-23 DOI:10.1109/CCDC.2015.7162682

Zhu Hailong, Bin Liang, Zhang Tao, Hua Junpeng

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引用次数: 6

Abstract

This paper aims at determining several designing considerations for star tracker which uses on aircraft during daytime at altitudes around 10 km. From analysis of operational environment, the sky background radiation caused by the sun is the main factor which affects the performance of star tracker. In order to research insight, star magnitude model is established to calculate stellar radiation and MODTRAN software is used to obtain the sky background radiation. The contrast of detection, the ratio of stellar radiation and sky background radiation, is defined as the criterion to determine these considerations. Finally, H-band waveband, from 1.5μm to 1.7μm, is chose as the optimal detection waveband due to better comprehensive performance in detection. InGaAs detector is selected for the airborne star tracker after trade-off studies included a comparison in terms of detector format, cost and cooling requirements. Simultaneous measurements with three field of view are determined as the preferred design prototype because of higher detectable limiting magnitude and star detection probability.

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机载星跟踪器在日间的设计考虑

本文的目的是确定在10公里高度左右的白天飞机上使用的星跟踪器的几个设计注意事项。从运行环境分析来看，太阳引起的天空背景辐射是影响星跟踪器性能的主要因素。为了研究洞察力，建立星等模型计算恒星辐射，使用MODTRAN软件获取天空背景辐射。探测的对比，即恒星辐射与天空背景辐射的比值，被定义为确定这些考虑因素的标准。最终选择1.5μm ~ 1.7μm的h波段作为最优检测波段，其综合检测性能更好。经过权衡研究，包括探测器格式、成本和冷却要求的比较，InGaAs探测器被选择用于机载星跟踪器。由于三视场同时测量具有较高的可探测极限星等和检星概率，因此确定了三视场同时测量作为优选的设计原型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The 27th Chinese Control and Decision Conference (2015 CCDC)

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