Abstract
During last and coming years we are witnessing the immense qualitative and quantitative progress in the GNSS (Global Navigation Satellite Systems) domain. Two new technologies are under development offering considerable improvement of the accuracy of orbits: the on-board accelerometers and the inter satellite links. Because non-gravitational forces cannot be modeled with the desired precision, the direct on board measurements of those forces may improve the solutions for orbits, positions and timing. The range and range-rate measurements between satellites open the way to the elimination of the errors caused by the ionosphere and station uncertainties. The improvements in the on-board equipment like clocks and signal generators will provide enhanced radio signals while in the user segment the receivers of the new generation will be able to digest up to 50 signals. Combined with the MEMS (MicroElectroMechanical Systems) type inertial devices the user platforms will be able to provide the high accuracy positioning and timing even in the very unfavorable conditions, including the high dynamic motion or covered environment. The question of the usefulness of the High Precision PNT (Positioning, Navigation, Timinig) for scientific research is discussed in this paper. Here the following issues are taken into consideration: very accurate airborne gravimetry, millimeter accuracy low-altitude satellite orbit determination using GNSS observables and relativistic effects.
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Zieliński, J.B., Wielgosz, A. (2018). High Precision GNSS—Prospects for Science and Applications. In: Cefalo, R., Zieliński, J., Barbarella, M. (eds) New Advanced GNSS and 3D Spatial Techniques. Lecture Notes in Geoinformation and Cartography. Springer, Cham. https://doi.org/10.1007/978-3-319-56218-6_1
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