Book Review: GPS theory and practice. Second Edition, HOFFMANNWELLENHOFF B., LICHTENEGGER H. and COLLINS J., 1993, 326 pp., Springer, £31.00 pb, ISBN 3-211-82477-4

TL;DR: Although the accuracy of the GPS PPP applied in aerial triangulation is a little lower than that of traditional bundle block adjustment with dense GCPs, it can still satisfy the accuracy requirement of photogrammetric point determination for topographic mapping at many scales.

TL;DR: The results from GPS measurements carried out in NE India indicate that about 15-20 mm/yr of convergence is being accommodated there and approximately 1.5 to 3.5 mm/r of the total N-S of the present-day convergence in the NE Himalaya is accommodated in the Shillong Plateau as discussed by the authors.

TL;DR: In this article, a procedure is introduced to derive the ionospheric total electron content (TEC) from data recorded by a network of the Global Positioning System (GPS) in Taiwan based on the network data, the latitude-time-TEC (LTT) plots prior to the three earthquakes are constructed

TL;DR: In this article, the authors discuss how far and in what directions, atomic clock technology should be pushed to provide maximum benefits to GNSS performance, reliability and cost, and provide a baseline by reviewing current GNSS satellite atomic clock technologies.