WLS-analyzer is a wireless locating system (WLS) utility software which is developed by ICP DAS. It has the monitoring and positioning functions that can be used to integrate wireless positioning system of ICP DAS. The WLS utilize the wireless of the active-base 2.4GHz locators(Tag) which transferred by the receivers(Router). The WLS-analyzer retrieves the first three stronger signals of the Routers and use the triangulation algorithm to estimate the location of the Tag. In another words, the first three closer Routers could indicate where the Tag is. Here shows the illustration.