对于已知点仅具有80坐标或54坐标的工程项目,必须先测定已知点的84坐

对于已知点仅具有80坐标或54坐标的工程项目,必须先测定已知点的84坐标,为求解坐标转换参数所用。此时要求基准站可以安置在已知点上,也可以安置在待定点上,甚至可以安置在临时点上,但都必须先进行单点定位,测定基准站的84坐<br><br>标,一般取10分钟的观测数据即可。而流动站必须先到已知点进行流动观测,获取所有已知点的84坐标,然后同样在GPS-RTK系统内通过公共点匹配求解坐标转换参数。有了转换参数就可以到待定点上依次观测了。对于没有布设GPS-RTK控制网的公路项目,一般都需要按此种作业方式进行。<br><br>由于基准站的安置都具有一定的可选性,因此应满足以下几方而的要求:<br><br>(1)点位周围没有明显的障碍物和电磁信号干扰物,以有利于卫星信号的接收。

对于已知点仅具有80坐标或54坐标的工程项目,必须先测定已知点的84坐标,为求解坐标转换参数所用。 此时要求基准站可以安置在已知点上,也可以安置在待定点上,甚至可以安置在临时点上,但都必须先进行单点定位,测定基准站的84坐<br><br>标,一般取10分钟的观测数据即可。 而流动站必须先到已知点进行流动观测,获取所有已知点的84坐标,然后同样在GPS-RTK系统内通过公共点匹配求解坐标转换参数。 有了转换参数就可以到待定点上依次观测了。 对于没有布设GPS-RTK控制网的公路项目,一般都需要按此种作业方式进行。<br><br>由于基准站的安置都具有一定的可选性,因此应满足以下几方而的要求:<br><br>(1)点位周围没有明显的障碍物和电磁信号干扰物,以有利于卫星信号的接收。

For the engineering project with only 80 or 54 coordinates of the known points, the 84 coordinates of the known points must be determined first, which is used to solve the coordinate transformation parameters. At this time, it is required that the reference station can be placed on a known point, on a waiting point, or even on a temporary point, but it must be positioned at a single point to determine the position of the reference station<br>Generally, 10 minutes of observation data is enough. The mobile station must first go to the known points for mobile observation, obtain 84 coordinates of all known points, and then solve the coordinate transformation parameters through common point matching in GPS-RTK system. With the conversion parameters, we can go to the observation point in turn. For highway projects without GPS-RTK control network, this kind of operation mode is generally required.<br>Since the placement of the reference station is optional, it should meet the following requirements:<br>(1) There are no obvious obstacles and electromagnetic interference around the point, which is conducive to the reception of satellite signals.<br>