论文部分内容阅读
最近美国Magnavox公司推出了一种全球定位系统产品系列—M×4400G P S定位导航系统。这种系统主要是一具便携式双通道C╱A码接收机,它是专供现行过渡性G P S星座和为提高已经配置的许多卫星的利用率而设的。假若已知卫星的高度,而且连接了原子频率标准的话,那么,即使只有两颗可见卫星,ME 44u0也可用来导航。对双卫星导航来说,连接一个外部的频率标准,能在相同地段,把可用卫星作用距离增加1倍。在G P S工作间隙提供导航时,根据外部速度和航向传感器的输入,MX 4400将自动地进
Recently, the United States Magnavox introduced a global positioning system product line-M × 4400G P S positioning navigation system. The system is primarily a portable two-channel C / A code receiver designed for the current transitional G P S constellation and designed to increase the utilization of many satellites already deployed. If the height of the satellite is known and the atomic frequency standard is connected, the ME 44u0 can be used to navigate even with only two visible satellites. For two-satellite navigation, connecting an external frequency standard can double the range of available satellites in the same location. When navigating in the G P S working clearance, the MX 4400 automatically advances according to the external speed and heading sensor input