janssen_gps_solutions_2001.pdf (129.19 kB)
Optimizing the number of double-differenced observations for GPS networks in support of deformation monitoring applications
journal contribution
posted on 2023-05-16, 16:22 authored by Janssen, VDeformation monitoring using GPS is usually carried out by installing and operating a local network of GPS receivers mounted on the deforming body, e.g., the flanks of a volcano. For continuous monitoring applications a near-real-time, epoch-by-epoch solution obtained from multi-baseline processing is desired in order to take into account between-baseline correlations and to detect movements over as short a period of time as possible. In the case of the volcano monitoring application, the sides of the volcano will block out part of the sky, hence the receivers are not likely to track a lot of satellites that are visible from all receiver stations at the same time. If the usual base-station/base-satellite approach is used in the baseline processing, only the common satellites are considered, resulting in the number of possible doubledifferenced observables being comparatively low; hence a lot of valuable information may be lost. The proposed method, based on the work by Saalfeld (1999), considers satellites that are visible from a small number of network stations only. Thus the number of independent doubledifferenced observables can be maximized in order to obtain a better solution. A numerical example is given that verifies the improved solutions that can be obtained using this data processing approach.
History
Publication title
GPS SolutionsVolume
4Pagination
41-46ISSN
1080-5370Department/School
School of Geography, Planning and Spatial SciencesPublisher
John Wiley & Sons, IncPlace of publication
New YorkRights statement
Copyright 2001 John Wiley & Sons, IncRepository Status
- Open