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The reference mark height for configuration 3 was not measured agl, but was measured to be 15.2 cm below the reference mark for configuration 2 or 1.76m-0.15m = 1.61 m. (BUT the height of the configuration 3 reference mark on the profile tower was was later measured to be either 1.505m or 1.53m!) The heights of the downwind array sonic booms above the reference mark were measured to be
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