Developing an Integrated SAR Interferometry and GNSS service for Precision Survey as an Operational Integrated Application
- Paper number
IAC-12,B5,2,9,x14879
- Author
Dr. Alan Fromberg, Systems Engineering & Assessment Ltd, United Kingdom
- Coauthor
Dr. Christopher Prior, Systems Engineering & Assessment Ltd, United Kingdom
- Coauthor
Ms. Pooja Mahapatra, Delft University of Technology (TU Delft), The Netherlands
- Coauthor
Dr. Marko Komac, Geološki zavod Slovenije, Slovenia
- Coauthor
Dr. Rachel Holley, Fugro NPA, United Kingdom
- Coauthor
Mr. Jan Leyssens, Septentrio Satellite Navigation, Belgium
- Coauthor
Mr. Paul Tyson, Linwave Technology, United Kingdom
- Coauthor
Dr. Hans van der Marel, Delft University of Technology (TU Delft), The Netherlands
- Coauthor
Mr. Blaž Milanič, Geološki zavod Slovenije, Slovenia
- Year
2012
- Abstract
This paper presents the results of the EU Framework Programme Seven project I2GPS and identifies the further evolutions that would be required to translate successful field trials into an operational service. I2GPS developed a unit for co-registering continuous GNSS measurements, with a Septentrio AsteRx2 receiver, and InSAR scattering response, from an SEA Compact Active Transponder and tying these to a local geodetic reference. Two field trials were conducted. The first trial validated the unit at a calibration site close to Technical University of Delft confirming measurement accuracy against ground levelling to ±4mm (double difference). The second identified significant displacement over 6 months at a landslide site near Koroska Bela of concern to the Geological Survey of Slovenia and confirmed the utility of the results. The second trial, at a remote site, also highlighted three needs to assure reliability and render a service operationally viable: Careful planning and installation of equipment to assure that targets are visible to the satellite and representative of landslide displacement; reliable access to affordable InSAR data, such as is planned to be available from GMES Sentinel-1; remote communicate of telemetry and GNSS data from the units to minimise personnel access and reduce operations costs. Users are typically interested in reliable data provision for decision making end less concerned about the sources from which the results are derived. For operational integrated operations it is important to integrate the optimum data and services, rather than artificially insisting upon the exclusive use of multiple space assets as is the case in some quasi-operational development programmes. For example, the Koroska Bela site has access to reliable GSM signals which will prove more cost effective than modems communicating via satellite constellations. It is argued that integrating terrestrial and space based measurements (for the landslide example likely to include humidity and inclinometer measurements with space based measurements of displacements) is equally valid as an integrated application than the need to include at least two discreet space assets.
- Abstract document
- Manuscript document
(absent)