Monitoring the Automated GPS Network of Switzerland AGNES

摘要

Since 1998 swisstopo has been operating the Automated GPSNetwork of Switzerland (AGNES) which presently consists of30 permanent GPS stations and serves different applications suchas reference frame maintenance and zenith total delay estimatesfor numerical weather prediction. Furthermore, the positioningservice swipos has been available for commercial use since 2001.Monitoring the quality of the derived products is essential not onlyon a short-term, but also on a long-term basis. Different tools, such as an SMS/e-mail messaging system and aweb interface, were developed for monitoring the computers, thedata flow, the stability of the coordinates, and the availability andquality of the products. The monitoring of coordinates and zenithtotal delay estimates are realized using the Bernese GPS Software,as well as with the real-time positioning software GPSNet fromTrimble. Examples and comparisons are shown, in particularduring difficult conditions like, e.g., heavy snow fall.