评估遥感卫星对海上移动目标的监测能力

IF 2.8 3区 地球科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS
Weiming Li, Zhiqiang Du, Li Wang, Tiancheng Zhou
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引用次数: 0

摘要

虽然自动识别系统(AIS)可用于监测轨迹,但遥感卫星群监测海上移动目标已成为现实。日益增长的监测需求对卫星建造提出了挑战,迫切需要对卫星的监测能力进行评估。传统的评估方法侧重于监测的空间特性,但忽略了时间特性和目标的运动特性。本研究提出了一种将监测的时空特征与目标运动学特征相结合的评估方法。首先,建立了用于计算转移概率的目标运动预测模型和用于获取观测条带和时间窗口的卫星观测信息计算模型。其次,建立了一套指标体系,包括目标探测能力、观测覆盖能力、空窗比例、观测窗口离散度和观测窗口偏差。第三,结合层次分析法和熵权法完成综合评价,得出监测能力得分。最后,通过模拟实验评估卫星对船舶轨迹的监测能力。结果表明,当网格大小为目标大小的 1.6 至 1.8 倍,任务持续时间约为轨迹点之间时间间隔的两倍时,该方法是有效的。此外,该方法还被证明适用于各种环境。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of the Monitoring Capabilities of Remote Sensing Satellites for Maritime Moving Targets
Although an Automatic Identification System (AIS) can be used to monitor trajectories, it has become a reality for remote sensing satellite clusters to monitor maritime moving targets. The increasing demand for monitoring poses challenges for the construction of satellites, the monitoring capabilities of which urgently need to be evaluated. Conventional evaluation methods focus on the spatial characteristics of monitoring; however, the temporal characteristics and the target’s kinematic characteristics are neglected. In this study, an evaluation method that integrates the spatial and temporal characteristics of monitoring along with the target’s kinematic characteristics is proposed. Firstly, a target motion prediction model for calculating the transfer probability and a satellite observation information calculation model for obtaining observation strips and time windows are established. Secondly, an index system is established, including the target detection capability, observation coverage capability, proportion of empty window, dispersion of observation window, and deviation of observation window. Thirdly, a comprehensive evaluation is completed through combining the analytic hierarchy process and entropy weight method to obtain the monitoring capability score. Finally, simulation experiments are conducted to evaluate the monitoring capabilities of satellites for ship trajectories. The results show that the method is effective when the grid size is between 1.6 and 1.8 times the target size and the task duration is approximately twice the time interval between trajectory points. Furthermore, the method is proven to be usable in various environments.
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来源期刊
ISPRS International Journal of Geo-Information
ISPRS International Journal of Geo-Information GEOGRAPHY, PHYSICALREMOTE SENSING&nb-REMOTE SENSING
CiteScore
6.90
自引率
11.80%
发文量
520
审稿时长
19.87 days
期刊介绍: ISPRS International Journal of Geo-Information (ISSN 2220-9964) provides an advanced forum for the science and technology of geographic information. ISPRS International Journal of Geo-Information publishes regular research papers, reviews and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. The 2018 IJGI Outstanding Reviewer Award has been launched! This award acknowledge those who have generously dedicated their time to review manuscripts submitted to IJGI. See full details at http://www.mdpi.com/journal/ijgi/awards.
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