Models for controlling national and continental networks |
| |
Authors: | V Ashkenazi |
| |
Institution: | (1) Department of Civil Engineering, University of Nottingham, England |
| |
Abstract: | Doppler derived geocentric and relative geodetic positions are now widely used for detecting and controlling systematic scale
and orientation errors in large classical terrestrial triangulation networks. However, the combined adjustment of terrestrial
and space data raises several theoretical problems, including the choice of appropriate reference systems, the a priori weighting
of the various types of observations, the modelling of systematic errors and the conditioning of the network in terms of internal
and external rank deficiencies. Tests with large national networks show conclusively that, without correct modelling, systematic
errors will largely be unaffected by “higher order” observations. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|