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首页> 外文会议>Asian conference on remote sensing;ACRS >CONTAINER TRACKING VIA AIS SATELLITES
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CONTAINER TRACKING VIA AIS SATELLITES

机译：通过AIS卫星进行集装箱跟踪

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Current systems for worldwide container tracking use global navigation satellite systems (GNSS) to determine a container's geographical position and a satellite modem for communicating this information to a central server. However, the communication results in significant operational costs and both services require a large degree of line-of-sight between the container and the corresponding satellites. In particular the latter requirement is difficult to fulfil once containers are stacked. This paper describes an alternative approach based on the automatic identification system (AIS), which in recent years experienced a global boom after several companies launched satellites that can sense the signal remotely from space enabling global remote sensing of AIS signals. Originally derived for the exchange of voyage details among ships in order to reduce the risk of collisions, the described system extends AIS twofold. Firstly, the surrounding transceivers' transmitted AIS information are used together with additional information to compute a container's position, thus, forgoing the usage of a GNSS receiver. Secondly, embedded features in the AIS message protocol are used to transmit the container's position transparently avoiding interference with the original use case. Global coverage is enabled through the availability of numerous AlS-dedicated remote sensing satellites as well as auxiliary AIS payloads onboard of communication satellites. Simulation results and measurements are presented to demonstrate the capability of determining a geographical position for a container in a GPS-denied environment. A strong focus is placed on the spaceborne sensing, which is crucial for global 24/7 availability of the tracking information.
机译：当前用于全球集装箱跟踪的系统使用全球导航卫星系统（GNSS）来确定集装箱的地理位置，以及用于将该信息传递到中央服务器的卫星调制解调器。但是，通信会导致可观的运营成本，并且两种服务都需要在容器和相应的卫星之间有很大的视线。特别地，一旦堆叠了容器，则后一要求很难满足。本文介绍了一种基于自动识别系统（AIS）的替代方法，近年来，在几家公司发射了可以从太空远程感测信号的卫星之后，实现了AIS信号的全球遥测，该方法近年来在全球范围内蓬勃发展。描述的系统最初是为在船舶之间交换航行细节以降低碰撞风险而派生的，它对AIS进行了双重扩展。首先，周围的收发器发送的AIS信息与其他信息一起用于计算容器的位置，因此放弃了GNSS接收器的使用。其次，AIS消息协议中的嵌入式功能用于透明地传输容器的位置，从而避免干扰原始用例。通过提供众多专用于AlS的遥感卫星以及通信卫星上的辅助AIS有效载荷，实现了全球覆盖。给出了仿真结果和测量结果，以证明在GPS拒绝的环境中确定集装箱地理位置的能力。重点放在星载传感上，这对于全球24/7全天候跟踪信息的可用性至关重要。

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