Geodetic observatory Pecný
In 2002, the data center was completely re-implemented and becamed the official EUREF Permanent Network (EPN) data center.
The main goals to reimplement the data center consisted were:
The software package developed to operate GOP data center in principle works in three steps:
The software has been written in perl and consists of the following features:
New implementation uses strictly non-redundant data transfer and storage. About 2/3 of the data storage capacity and the traffic loading was spared compared to the previous implementation. Thanks to the modularity, the data fetching, conversion and storage is separated. Different sources (incomming, download, mirror etc) can be simply integrated and since 2004, hourly files from real-time data streams has been implemented. A cascade of collecting procedure thus co-exists, e.g. if real-time data are not available, standard download procedure follows.
Every download process is running in a special thread for the data grouped for every single source. The threads are given a limited interval after which the process is stopped. Unfinished data can be completed in a next run, because it is preceeded by a local data center content checking. Separating the download from the data convertion, both processes could be scheduled in different intervals. Downloads are thus started every 4 minutes while converisons every 1 minute for all completed data.