The use of GPS database in control networks

Working with GPS, a large amount of data is often produced. In complex works, like the control networks, where many stations are involved, measurements are repeated more and more in time, and post-processing is performed with different softwares and/or options, in order to optimize the solutions; it is therefore very important to carefully archive alla data, avoiding any possible mix-up. In pratice, this often not a simple job. In present work, some general concepts are illustrated, which have to be followed archiving GPS data. Some tipical problems are examined, referring to practical examples.