TWP/VCEIL/C1 - Ceilometer offset

When the replacement ceilometer was installed at Manus it was tilted 6 degrees.
Since the angle correction setting was not activated, the cloud base heights
reported by the instrument were higher than actual by 0.55% (39 m at 7 km).

Use data with caution.

• Lowest cloud base height detected(first_cbh)
• Third cloud base height(third_cbh)
• Second lowest cloud base height(second_cbh)