翻译

Introduction
The pseudorange-based differential global positioning system

DGPS technique is extensively used for ground control point

GCP establishment of medium and high resolution satellite imagery
because this technique can provide accurate positioning results
at the 1 m level, provided the correction data age is less than
10 s, and the user is within 50 km of the reference station
Parkinson
and Enge 1996. Rizos and Satirapod
2001 stated that the
DGPS technique generally provides an accuracy of ter than 3
m in the horizontal component at twice the distance root mean
square error
2.DRMS. It is, however, important to note that the
effectiveness of the relative positioning technique is largely dependent
on the distance ween the two receivers. If the distance
ween the receivers increases, the residual errors will become
larger, and hence the quality of the positioning results degrades.
This is a limitation of the DGPS technique. In additi
导言

该伪距为基础的差分全球系统

差分全球系统技术广泛用于地面控制点

控制点建立中期和高分辨率卫星图像

因为这种技术可以精确的结果

在1米的水平，了校正年龄小于

10秒，用户是在50公里的参考站帕金森

和1996年恩。 Rizos和Satirapod指出， 2001年

差分全球系统技术了一个一般精度优于3

米的水平分量的两倍距离均方根

方误差2.DRMS 。然而，必须指出的是，

效力的相对技术在很大程度上取决于

之间的距离上的两个接收器。如果距离

接收器之间的增加，将成为残差

较大，因此，高质量的结果降低。

这是一个的差分全球系统技术。在additi