Is a TSI suitable for all weather operation?
YES. The Model TSI-440 and TSI-880 are designed to withstand all types of weather and high winds if properly anchored to a solid base. The mirror heating system drives away dew, frost and snow. Note that the Model TSI-880 was designed for remote unattended full time operation under difficult conditions, e.g. at airports. The lower priced Model TSI-440 was designed for applications where people are available to manage the PC that is dedicated to process the data.