When a data file is added to VDV the variable names are used as they appear in the header of the data file.
Creating Alias Names for each variable and configuring Units can be done online.
Go to Setup > Site and select the site to configure by clicking the edit button:
At the top it is also possible to change the site name, change wether the station is active or not and change the .
NOTE: If the station Active is set to NO no new data will be imported.