A Static Displacement Monitoring System for VLBI Antenna Using Close-Range Photogrammetry

Author:

Kim, Hyukgil  Yun, Hongsik  Hwang, Jinsang  Hong, Sungnam  

Journal:

APPLIED SCIENCES-BASEL

Issue Date:

2017

Abstract(summary):

In this study, a static displacement monitoring program was developed to maintain the accurate performance of a Very Long Baseline Interferometry (VLBI) antenna by monitoring its structural stability. The monitoring program was designed to measure static displacement, among the many displacements of the antenna's main reflector, which can directly affect its performance. The program measures the position of a monitored object with mm-level accuracy through close-range photogrammetry that uses high-resolution Charge Coupled Device (CCD) cameras. The developed program will be used to evaluate the structural soundness of an antenna based on continuous displacement measurements, which can also be used as basic data for repair and reinforcement work in the future.