For VAPOR to read and convert CAM data, it must be able to calculate a vertical coordinate, measured in meters.
Many CAM datasets include this variable, named Z3. If Z3 is not included in the data, VAPOR will attempt to calculate it based off of CAM's Hybrid Sigma coordinate system, along with other necessary variables such as Temperature and Pressure.
It is strongly recommended that CAM data files include their vertical coordinate variable Z3.
