Adding a system
===============

After adding a station to the database, we need to add a new system. 
To do this, click on the **HOI systems** in the *System settings* panel.
This will take you to a page with a list of all available systems that are connected with your stations. This list should
be empty if this is the first time you add a system. 

.. note:: 

   In the Single Calculus Chain, a *HOI System* represents a specific configuration of a lidar system. 
   For example, if you are operating a lidar system and you use different channels during daytime and nightime, 
   you will need to register *two different* systems in the database, one for each different configuration you use.


To add a new system to the database click on **Add HOI system** at the top right of the screen.
This will take you to a new page were you can fill in the needed information. As before, the fields in **bold**
are mandatory and you will need to fill them before you can save you new system. 

.. note::
   
   Not every field that is present in the database is used in the in the Single Calculus Chain. 
   Many of them are part of the Handbook of Instruments.

For now you will need to fill in the following fields:

Name
   The name of your system.
   
Station (owner)
   From the drop-down list, select the station which this system belongs to.

Configuration
   The name of the specific configuration. For example you could specify "night time" if the system you are registering
   correspond to the night-time configuration of your system
   
Pi
   The principle investigator of this system
   
Height asl
   The altitude of the system above sea level (in meters). 
   
You can leave all the other fields empty. When you are done, press the **save** button at the bottom right of the page.
This will take you back to the list of your systems. If everything went OK your new system you just added should appear
in the list.

We don't have to make any more changes in this part, so you can click on **Home** 
on the top left of the page to return to the starting page of the *admin section*.



 

