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Figure 1 Example of 1-min equivalent level measurements. Dots: 1-min equivalent levels. Solid line: calculated 30-min equivalent levels. Dashed line: calculated 4-h equivalent levels. Both calculated levels use a sliding time window

Figure 1 Example of 1-min equivalent level measurements. Dots: 1-min equivalent levels. Solid line: calculated 30-min equivalent levels. Dashed line: calculated 4-h equivalent levels. Both calculated levels use a sliding time windo<i>w</i>