IC SG2

IC-SG2: Quality of geodetic multi-sensor systems and networks

Chair:H. Kutterer (Germany)
Affiliation:Comm. 4, 1

Introduction

Modern geodetic observations are usually embedded in an integrated approach based on multi-sensor systems and networks. The fields of application are as manifold as the sensors in use. For example, total stations, GPS receivers and terrestrial laser scanners are applied in engineering geodesy for structural monitoring purposes together with permanently installed equipment. Geometric and physical space-geodetic sensors may serve as a second example since they are used for the determination of global reference frames.

It is good geodetic tradition to assess the quality of the obtained results for further use and interpretation. However, each field of application provides its own quality standards which are to some extent incomplete regarding the immanent processes. At present, there is no general methodology available for the theoretically founded quality assessment of geodetic multi-sensor systems and networks and of the induced processes.

The main focus of the SG is on the methodological foundation of quality in the context of close-range applications in engineering geodesy. Typical properties of the systems and networks considered here are on the one hand their readiness for real-time application and their adaptivity to observed system and process variations. On the other hand the systems and networks as well as their input are uncertain which limits analysis, interpretation and control. The IC SG2's work will cover at least three main fields in this context:

• Identification and mathematical definition of the relevant process-related uncertainty and quality properties and models, propagation and inference,
• revision, quality-related extension, and comparison of different approaches for the state space prediction and filtering (e.g., Kalman and shape filters, Bayesian filters, particle filters, fuzzy filters),
• validation studies using applications of broader geodetic interest such as geodetic monitoring, mobile mapping, machine control.

Comparable work outside geodesy both in the engineering and mathematical communities and in international standardization will be taken into account.

Objectives

The main objectives of the IC SG2 are

• to derive and promote a terminology and methodology for the quality assessment of geodetic multi-sensor systems and networks,
• to provide a unique platform for quality-related issues in geodesy and neighbouring fields,
• to initiate extended studies on related probabilistic and non-probabilistic methods for interpretation and decision,
• to monitor parallel developments in other communities.

To achieve these objectives, the IC SG 2 interacts and collaborates with the ICCT and its entities as well as the IAG Commissions 4 and 1.

The SG's work will be distributed to IAG sister organizations through respective members.

Program of Activities

The IC SG2s program of activities will include

• organization of SG meetings and of a scientific workshop on quality issues
• participation in respective symposia,
• maintaining a website for quality-related information,
• supporting contributions to the ICCT activities.