Volume 2(4), Spring 1999

• United States' Nationwide Differential Global Positioning System. Leonard W. Allen III, 1-6

• Differentiation for High-Precision GPS Velocity and Acceleration Determination. A. M. Bruton, C. L. Glennie & K. P. Schwarz, 7-21

• Assessment of the LandStar Real-Time DGPS Service under Several Operational Conditions. G. Fotopoulos, M. E. Cannon, A. Bogle & G. Johnston, 22-34

• Variances of GPS Phase Observations: The SIGMA-e Model. H. Hartinger & F. K. Brunner, 35-43

• A Regional GPS Network Solution for Monitoring Deformations of the Southeastern Eurasian Plate. H. Bâki Iz, J. Wang & Y. Chen, 44-51

• A Modular Approach to Precise GPS Positioning. Kees de Jong, 52-56

• GNSS Activities Report. L. Chesto. 57-59

• Eye on the Ionosphere: Measuring Scintillation Effects from GPS Signals. A. J. van Dierendonck, 60-63

• GPS & GLONASS Current Bibliography. T. Soler. 64-66

GPS Solutions...

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6(1)  6(2)  6(3)  6(4)  7(1)  7(2)  7(3)  7(4)  8(1)  8(2)  8(3)  8(4)  9(1)  9(2)  9(3)  9(4)