Study on the wide area monitoring system of fishing boat and gear positions by LEO communication satellite

研制了一种用于ORBCOMM系统的浮标内置GPS接收机。ORBCOMM系统是一种基于通信卫星的远程监控系统。利用该系统可以对浮标的漂移位置进行近乎实时的监测。但在实际海况下，系统性能评价不够充分。在这篇报告中，我们解释了这个新的卫星监测系统的概念。并在海上进行了定位精度和GPS数据通信延迟时间的验证实验。为了提高定位精度，提出了在浮标上增加单个小型GPS接收机的方案，并对实验结果进行了讨论。

A buoy built-in GPS receiver for ORBCOMM system was developed recently. The ORBCOMM system is a kind of remote monitoring system using the communication satellite. Using this system, the drifting position of a buoy can be monitored in nearly real time. But the system performance is not evaluated sufficiently in actual sea conditions.In this report, we explained the concept of this new satellite monitoring system. And the results of verification experiments on positioning accuracy and GPS data communication delay time conducted at sea. A proposal of a small single GPS receiver added to the buoy in order to improve the positioning accuracy is made and the experimental results is also discussed.