TY - CONF A1 - Kind, Thomas A1 - Maierhofer, Christiane T1 - Railway Ballast Fouling Inspection by Monitoring the GPR Propagation Velocity with a Multi-Offset Antenna Array T2 - 11th International Conference on Ground Penetrating Radar, the Ohio State University N2 - In this paper, a new method for the investigation of the degradation of ballast railway track beds is proposed. An array of antennas is used for simultaneous acquisition of reflected radar impulses, which have been transmitted from different sending positions. This array setup allows an automated CMP-measurement, which enables a direct calibration of the ballast thickness. These multiple offset measurements using the array setup are well suited for fast railway inspections. The method offers the possibility to visualize the state of degradation of the ballast in a velocity spectrum. T2 - 11th International Conference on Ground Penetrating Radar, the Ohio State University CY - Columbus, Ohio, USA DA - 19.06.2006 KW - Radar KW - Non-destructive testing KW - Railroad PY - 2006 SP - 1 EP - 4 CY - Columbus, Ohio AN - OPUS4-39825 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -