铱星MODEM在差分GPS数据传输中的应用

Application of Iridium Modem in Differential GPS Data Transmission

差分GPS中的GPS流动站处于偏远地区时,使用铱星通信作为数据链路以解决常规无线通信方式无法实施的问题。文中测试了应用铱星MODEM传输数据时存在的问题,给出相应的解决方法。以一个数据报的传输为例,建立并分析发送方、接收方的数据传输Petri网模型,最后在PC104工控机和普通PC机上实现。实践证明,保证数据可靠传输的方法稳定、有效。

The Iridium communication is adopted as the data link to resolve the problem that general communication system can't be applied when the GPS mobile station in the DGPS system lies out of the way.The Data transmission using the Iridium MODEM is tested and validated the defect shown,and the solution is put forward.Based on a data package transmission,the data transmission model for the sender and receiver is established and implemented on both PC104 and common PC.The method to ensure data reliable transmission proves stably and effectively in practice.