Mundane
发表于 2025-3-25 04:59:31
Use of GPS carrier phase for high precision frequency (time) comparisonards have accuracy below 2x10. and the classical common-view method is no longer satisfactory. Use of GPS carrier phase combined with code measurements is a promising technique for the accurate comparison of remote clocks. This paper discusses some error sources disturbing the uncertainty of the com
jealousy
发表于 2025-3-25 08:12:48
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厌恶
发表于 2025-3-25 15:23:57
Status and development of the European height systemsLN-95 project are to establish an unified vertical datum for Europe at the one decimeter level with the simultaneous enlargement of UELN as far as possible to include Central and Eastern European countries. More than 3000 nodal points were adjusted linked to the reference point of LTELN-73 (gauge Am
暂时别动
发表于 2025-3-25 18:10:30
Recovering the global gravitational field from satellite measurements of the full gravity gradientional procedure of solving this problem is based on constructing from the start several boundary value (.) relations, each of them corresponding to a separate second order potential derivative. In the present paper an optimal approach is elaborated for solving the spaceborne scalar boundary value pr
轻信
发表于 2025-3-25 22:53:07
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Irremediable
发表于 2025-3-26 01:03:24
Direct and local comparison between different ssatellite mission for the gravity field on-the-flyes of measurement are basically three, namely: the measurement of accurate orbit anomalies and of non gravitational forces acting on the satellite; the measurement of differential orbit anomalies and of their time variations along the line of sight of twin satellites; the measurement of the gradiome
Thymus
发表于 2025-3-26 07:21:40
Calibration/validation methods for GRACEd accuracy, especially at the long wavelengths. The measurements are line-of-sight range rates between two co-orbiting, low-altitude satellites that can be transformed into differences of geopotential and horizontal gravitation. One method to attempt the calibration and validation of GRACE data is t
Epidural-Space
发表于 2025-3-26 11:56:55
The 1999 GFZ pre-CHAMP high resolution gravity modeltly under development by GFZ Potsdam and GRGS in Toulouse. Based on the full variance-covariance matrix of this solution and terrestrial and altimetry derived surface gravity data, a new high resolution global gravity field model up to degree and order 359 will be computed. The solution will be calc
deriver
发表于 2025-3-26 15:47:58
Comparison and evaluation of the new Russian global geopotential model to degree 360 and operations executed, the global Earth gravity field model GAO-98 with the resolution level corresponding to the geopotential expansion into spherical harmonics up to 360. degree has been developed. The main parameters of the model developed are a set of mean anomalies for 30’ x 30’ — blocks cov
GRAVE
发表于 2025-3-26 19:46:40
Assessing the global land one-km base elsevation DEMelevation dataset to date. Developed by an international group of specialists, GLOBE comprises a global 30 arc-second latitude-longitude array, with land areas populated with integer elevation data. GLOBE is available on the World Wide Web, and on CD-ROM in a format convenient for image processing a