Examination based on:

The certification mark is awarded within the framework of voluntary testing and certification based on predefined test criteria. Test measurements are conducted on behalf of a test vehicle on an approved railway track .

Therefore measurement points are attached at particular positions alongside of the railway track which are exactly determined by means of GPS-RTK recording. These measuring points are the basis for the determination of the measurement accuracy.

Examination emphasis is thereby on:

1. Determination of measurement accuracy:

• recording of measured data
• evaluation and analysis of measurement data
• behaviour under impacts like:
  • shadowing effects
  • multipath scattering
  • loss of GNSS signals
  • acceleration and deceleration phase
• calculation of measurement accuracy
  • calculation of relative measurement accuracy according to DIN ISO 5725-2:2002
  • calculation of absolute measurement accuracy according DIN ISO 17123-8:2003
• evalustion of the system in regard its' suitability for tunnel measurement

2. Reliability:

• system failure
• incorrect measurements
• identification of errors
• protection of hardware components

3. Data type:

• data type for import (e.g. list of facilitites)
• data type for export (e.g. MS-Excel, TXT, AutoCAD, ESRI Shape)
• functionality
• conformity of formats

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