Research on the method of medium-long baseline solution only using Fr(φ);

The paper introduces the two problems that often meet in pit measure actual work,After ample research,puts forward new calculation method,pushes derivation formula,and makes the solution of problem more simple,convenient,accurate,which accorde with the demand of pit safe quality standardization production.

This paper elaborated the concept,the determining factor and calculation method of train common brake speed limiting.

The application of wavelet to data pretreatment in GPS baseline solution;

According to the characteristic of GPS project in the bridge of Hang Zhou bay,after we compared with anthropogenic increasing the error of the initial point can have the affect on the baseline solution,any error of initial point s coordinate may cause the error of three constituents of the baseline.

The un-modeled systematic errors are the most important factors for high-precision GPS baseline solution.

This paper briefly introduced the origin of errors of effects on GPS survey,and analyzed the influence that is caused by these errors to GPS survey,and the reference specifications and control specifications of baseline processing quality control were presented.

This contribution explains the difference and common between GPS data processing scientific research software and commerce software by comparing their capabilities,models selected and precision of outcome of baseline processing.