Being a columnar database supporting JOINS, the question 'whether to normalize or not to normalize DB tables' becomes less critical.
Nevertheless, use the following guidelines when designing your tables structure:
Normalization of fact/dimension tables (when ratio is 1:N) will help reduce column & row sizes. It would benefit in terms of both storage and GPU utilization and is especially important in cases of large text fields (Varchars & Nvarchar with length > 10) that hold data with low uniqueness. For example :
Operator name (.etc)