General oceanography,an introduction | G. Dietrich,K. Kalle,W. Krauss and G. Siedler, 1980. Wiley,Chichester, U.K., 2nd ed., xxi + 626 pp., £27.00     

Jens Meincke 《Earth》1982,18(2):183-184

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An enhanced strategy for GNSS data processing of massive networks   总被引：2，自引：1，他引：1  

Hua Chen  Weiping Jiang  Maorong Ge  Jens Wickert  Harald Schuh 《Journal of Geodesy》2014,88(9):857-867

Although the computational burden of global navigation satellite systems (GNSS) data processing is nowadays already a big challenge, especially for huge networks, integrated processing of denser networks with data of multi-GNSS and multi-frequency is desired in the expectation of more accurate and reliable products. Based on the concept of carrier range, in this study, the precise point positioning with integer ambiguity resolution is engaged to obtain the integer ambiguities for converting carrier phases to carrier ranges. With such carrier ranges and pseudo-ranges, rigorous integrated processing is realized computational efficiently for the orbit and clock estimation using massive networks. The strategy is validated in terms of computational efficiency and product quality using data of the IGS network with about 460 stations. The experimental validation shows that the computation time of the new strategy increases gradually with the number of stations. It takes about 14 min for precise orbit and clock determination with 460 stations, while the current strategy needs about 82 min. The overlapping orbit RMS is reduced from 27.6 mm with 100 stations to 24.8 mm using the proposed strategy, and the RMS could be further reduced to 23.2 mm by including all 460 stations. Therefore, the new strategy could be applied to massive networks of multi-GNSS and multi-frequency receivers and possibly to achieve GNSS data products of higher quality.  相似文献   

Observations of the Early Morning Boundary-Layer Transition with Small Remotely-Piloted Aircraft   总被引：1，自引：1，他引：0  

Norman Wildmann  Gerrit Anke Rau  Jens Bange 《Boundary-Layer Meteorology》2015,157(3):345-373

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Modelling the Mont Terri HE-D experiment for the Thermal–Hydraulic–Mechanical response of a bedded argillaceous formation to heating     

B. Garitte  T. S. Nguyen  J. D. Barnichon  B. J. Graupner  C. Lee  K. Maekawa  C. Manepally  G. Ofoegbu  B. Dasgupta  R. Fedors  P. Z. Pan  X. T. Feng  J. Rutqvist  F. Chen  Jens Birkholzer  Q. Wang  O. Kolditz  H. Shao 《Environmental Earth Sciences》2017,76(9):345

Coupled thermal–hydrological–mechanical (THM) processes in the near field of deep geological repositories can influence several safety features of the engineered and geological barriers. Among those features are: the possibility of damage in the host rock, the time for re-saturation of the bentonite, and the perturbations in the hydraulic regime in both the rock and engineered seals. Within the international cooperative code-validation project DECOVALEX-2015, eight research teams developed models to simulate an in situ heater experiment, called HE-D, in Opalinus Clay at the Mont Terri Underground Research Laboratory in Switzerland. The models were developed from the theory of poroelasticity in order to simulate the coupled THM processes that prevailed during the experiment and thereby to characterize the in situ THM properties of Opalinus Clay. The modelling results for the evolution of temperature, pore water pressure, and deformation at different points are consistent among the research teams and compare favourably with the experimental data in terms of trends and absolute values. The models were able to reproduce the main physical processes of the experiment. In particular, most teams simulated temperature and thermally induced pore water pressure well, including spatial variations caused by inherent anisotropy due to bedding.  相似文献