Influence of network configuration and stochastic model on the determination of the minimum detectable displacements (MDD) through sensitivity analysis and significance test

• Published in: Boletim de Ciências Geodésicas Vol. 30; pp. 1 - 13
• Main Authors: Rodríguez, Felipe Carvajal, Klein, Ivandro, Alves, Samir de Souza Oliveira, Veiga, Luis Augusto Koenig
• Format: Journal Article
• Language: English
• Published: Curitiba Universidade Federal do Paraná, Centro Politécnico 01.01.2024
• Subjects: Chi-square test; Configurations; Design factors; Ellipsoids; Network design; Parameter sensitivity; Sensitivity analysis; Stochastic models
• ISSN: 1413-4853; 1982-2170; 1982-2170
• DOI: 10.1590/s1982-21702024000100003

This study investigates the influence of geodetic network configuration, stochastic model, and the approach local or global on the determination of minimum detectable displacements (MDD) using sensitivity analyses and significance tests. The proposed approach integrates sensitivity characteristics to establish confidence regions based on MDD. In addition, we examine the equality between the critical value of a significance test and the non-centrality parameter derived from a chi-square distribution to compute concentric ellipsoids representing sensitivity and accuracy. The analyses were focused on evaluate how variations in network configuration, stochastic model, and the type of analysis (if global or local) affect the relationship between sensitivity and accuracy. Our results showed the importance of considering these factors, providing valuable insights for robust network design and analysis in practical applications.