The presion of moving differential measure is 2 . 5m 而动态差分水平定位的最坏估计为2 sin 。
2.
Differential measuring instrument 差动测量仪表
3.
The minimum field border must be less then 3m if static differential measure is usedo and if the moving differential measure is used . the minimum field border must be less than 5m . these research work will help us to use agl32 p roperly 当用agl32的静态差分定位来进行农田上水平定位时，最小被测的地块的每边长最好不小于3m ，而用动态差分定位时，最小被测的地块的每边长最好不小于sin 。
