BIOGRAPHY

from the Universität Hannover. He has worked in the field of GPS since 1983. In 1990 he founded the company Geo++®, which develops satellite navigation and positioning software and systems. Among these are the post−processing system GEONAP and real−time system GNSMART. Andreas Bagge got his Dipl.−Ing. in Geodesy from the Universität Hannover. Since 1986 he works in the field of GPS, first at the Universität Hannover, and now for several years at Geo++®. Gerald Boettcher received his degree in surveying from the Fachhochschule Oldenburg. Since 1998 he is involved in the application and evaluation of GPS projects. Dr. Martin Schmitz received his degrees in Geodesy from the Universität Hannover. He is working in the field of GPS for the industry and as a research fellow at the Universität Hannover since 1991. All four are currently employed at Geo++®. They are concerned in research and development in satellite positioning. One current project focus on real−time GPS deformation monitoring systems. Further projects among others are active reference networks for highly precise RTK phase positioning (GNSMART) and GPS station calibration project