 The Soil Moisture and Ocean Salinity Mission, SMOS, acquires surface soil moisture data of global coverage every three days. To validate the accuracy of the mission's data, a Soil Moisture and Soil Temperature Sensor Network was established in the Skjern River Catchment, Denmark. This network was designed to measure soil moisture and temperature at various locations within the catchment, allowing researchers to compare the data against the SMOS mission's data. The network's performance was evaluated by comparing the data collected from the network with the data collected from the SMOS mission. The results showed that the network performed similarly to the SMOS mission, indicating that it can be used to accurately assess soil moisture and temperature levels around the globe. This article was authored by Asperger and Sku, K. H. Jensen, and others.