The European Union launched a free correction service called [High Accuracy Service](https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has) or **HAS** starting in 2023. The service is delivered over the E6 frequency. In general, this service will greatly improve accuracy to receivers but is lower accuracy than an OSR or SSR-based RTK Fix. Additionally, a receiver can take up to 5 minutes to benefit from these corrections (convergence time is larger), as opposed to OSR (seconds) or SSR (~180 seconds) to achieve maximum accuracy. But HAS is free! And available with very little additional configuration.
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