In recent years, Global Navigation Satellite Systems (GNSS) have been increasingly used in meteorology and climatology, replacing traditional techniques for measuring atmospheric parameters. Despite the extensive global network of permanent GNSS stations around the world, current spatial resolutions are not sufficient to provide high spatial resolution data, which is necessary for climate models and weather prediction. The Low-cost GNSS network of receivers offers a cheaper, simplified, and more accessible solution. This study assesses the accuracy of Integrated Water Vapor (IWV) estimations from the Centipede low-cost network. The analysis focuses on a dataset of 13 stations located in South-Eastern France during a one-week summer period, from 19 July 2025 to 25 July 2025.