1. Mitt. Satellitenbeobachtunqsstation Zimmerwald;Bauersima,1983
2. Modeling and estimating the orbits of GPS satellites;Beutler,1985
3. Efficient computation of the inverse of the covariance matrix of simultaneous GPS carrier phase difference observations;Beutler;Manuscr. Geod.,1986
4. Estimating the ionospheric refraction effect on interferometric GPS-measurements;Campbell,1984
5. Test of GPS on the CERN-LEP Control Network;Gervaise;Proceedings of the Joint Meeting of FIG Groups 5b and 5c on Inertial, Doppler and GPS Measurements for National and Engineering Surveys,1985