Adding a channel

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

To add a new channel to the database click on Add HOI channel 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.

The fields you have to fill here are more, as many of these are used during the processing of measurements.

Warning

There is a last step, different from the previous cases, when saving a new channel. You need to connect your channel with a lidar system before you save, or else all your entry will be lost. Read carefully through this document (or directly the last section) to avoid any problems.

Fill in the fields

To start using the single calculus chain you will need to fill the following fields:

Name
The name of the channel ex. “355”, “1064 analog” etc.
Telescope
The telescope that is used for this channel
Laser
The laser that is used for this channel
Interference filter center
The center of the interference filter in nm
Interference filter FWHM
The FWHM of the interference filter in nm
Emission wavelength
The emission wavelength of the laser used for this channel
Field of view
The field of view related to this channel in mrad
Raw range resolution
The raw range resolution of the measured data in m
Dead time
The dead of the detector in ns. You should fill in this in case of a photon counting detector.
Trigger delay
The trigger delay value for the channel in ns. Fill in 0 if not needed.
Scattering mechanism
The scattering mechanism that is involved in this channel. Select the appropriate value from the drop-down list.
Dead time correction type
The dead time correction type to be applied. Select Not defined if none needs to be defined.
Background mode
The way to calculate the signal background. Select Not defined if none needs to be defined.
Signal type
The type of the signal that is measured, ex. “elT” for total elastic, “vrRN2” for vibrational-rotational Raman signal from Nitrogen molecules etc. See Signal types for details.
Detection mode
The detection mode of this channel.

Connecting to a system

Before you finish, you need to attach your channel to one of your systems. To do this, go at the bottom of the page and select your system from the drop-down list in the System channels area.

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 channels. If everything went OK your new channel you just added should appear in the list.