When you say your tracking axis is East-West do you mean the collector tracks from East facing to West facing during the day and the axis of the collector lies on a North-South orientation (azimuth = 0) or the AXIS of the trough is in an East-West orientation (azimuth = 90) and the collector altitude tracks during the day? You can check to make sure it's doing as you hope by plotting the slope and azimuth of the collector from the weather component. Jeff Thornton TESS Sent from my iPhone
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