The goal of the work discussed in t

The goal of the work discussed in this paper was to evaluate GPS sensitivity and accuracy for deformation control on non-permanent networks of di€erent extensions. This kind of network has been extensively considered in the recent past and it is still of relevant importance in several engineering, geological and geophysical applications. To this aim a high-precision device was properly built in order to set up known displacements along three orthogonal axes of a GPS antenna.
On the basis of the results obtained according to the outlined data analysis strategy, we can draw the following conclusions.
As regards local networks, the GPS is able to single out horizontal displacements at subcentimeter level and vertical displacements at centimeter level; moreover, the availability of a priori information on the stability of the points improves the results slightly but does not seem to be crucial in this kind of network.
As regards the regional network, the GPS is able to single out horizontal displacements at centimeter level, provided particular care is given to the tropospheric delay modeling by estimating suitable parameters. However, even if we are able to avoid gross distortions in the height estimates by the joint estimation of tropospheric and geometrical parameters, this approach seems not to be satisfactory for the height precisions: for this reason only displacements of some centimeters can be identified with sucient probability.

結果 (中文) 1:

本文讨论了工作的目标是评估 GPS 灵敏度、 高准确度的 di 不同扩展名的非常任理事国网络变形控制。这种网络已被广泛认为在最近的过去，它仍然是在几个工程、 地质和地球物理应用程序中的有关重要。达到这一目标的高精密设备正确始建建立已知位移三个正交轴的 GPS 天线。根据分级显示的数据分析策略获得的结果，我们可以得出以下结论。至于本地网络，GPS 是能挑出水平位移在 subcentimeter 水平和垂直位移一级厘米;此外，对稳定点的先验信息的可用性略有提高的结果，但似乎不是这种网络的关键。区域在网络方面，GPS 是能够挑出厘米级的水平位移提供建模的合适参数估计的对流层延迟得到特别照顾。不过，即使我们都能够避免由对流层和几何参数的联合估计的高度估计的严重扭曲，这种做法似乎并不令人满意的高度精度 ︰ 只有几厘米的位移可以认同苏系数概率这个原因。

結果 (中文) 3:

目标在本文中讨论的工作是评估GPS的灵敏度和准确度对直€不同扩展非永久性网络的变形控制。这种网络在最近几年得到了广泛的关注，在若干工程、地质和地球物理应用中仍然具有重要意义。为了这个目标，一个高精度的设备，以建立已知的位移沿三个正交轴的一个全球定位系统的天线。根据所获得的结果，根据所提出的数据分析策略，我们可以得出以下结论。至于本地网络，GPS可以单在亚厘米级的水平和垂直位移的厘米级的水平位移；此外，对点稳定的先验信息的可用性提高的结果却似乎没有这种网络的关键。至于区域网络，全球定位系统是能够单出水平位移在厘米级，提供特别照顾的对流层延迟建模估计合适的参数。然而，即使我们能够避免在高度严重扭曲估计对流层参数和几何参数的联合估计，这种方法似乎不满意的高精度：由于这个原因，一些厘米只有位移可以确定与苏有效概率。