The ASG (Accelerator Surveying & Geodetic measurements) section is responsible for the geodetic and large-scale metrology measurements as well as the alignment of the accelerator components and their associated beam transfer lines for the whole CERN site. Furthermore, the ASG section is in charge of the acquisition and processing of high accuracy point cloud data defined in the primary CERN reference frame (CCS). The ASG section is also driving the Research and Development to improve alignment techniques and methods to achieve the requirements of future projects.

The section is in charge of the architecture, design, implementation, testing, deployment and maintenance of the software dedicated to the survey activities at Cern.

The Experiment Surveying and Alignment (ESA) section of the GM group is in charge of the surveying, the large scale metrology and the alignment, for CERN physics experiments.

The HPA section is responsible for the design, implementation, operation and data analysis of 3D alignment solutions for specific components in the accelerators, transfer lines and experimental area infrastructure, requiring permanent position measurement and/or remote adjustments, within a micrometric accuracy in a harsh environment.