= Leica ALS50-II LIDAR =

The ARSF LiDAR system, for data collected in 2009 onwards, is a Leica ALS50-II. This includes a full waveform upgrade for 2010 onwards. 

The ALS50-II operates with laser radiation at 1064 nm. It works by firing a pulse every 4ns or 9ns and measuring the round trip time to when a reflection is detected. This is then converted into a distance. There are 2 banks of timing cards - each one with 4 cards. This means that it can measure up to 4 independent returns for each pulse (it only uses the 2nd bank of cards when operated at the higher pulse rate).




== Further Information ==

For more in-depth and technical information about the sensor and processing please see the following pages. Note that these are written primarily for internal use and so may be technical in nature.  

=== Discrete subsystem ===

 * [wiki:Sensors/LeicaLIDAR/MikesNotes] - Mike's notes on the Leica training course in Aug 2008 (to be digested and turned into real wiki pages at some point in the future).
 * [wiki:Sensors/LeicaLIDAR/MarksNotes] - Mark's bullet notes on the Leica training course in Aug 2008.
 * [wiki:Sensors/LeicaLIDAR/MashUp] - The digestion of both sets of notes.

=== Full waveform subsystem ===

 * [wiki:Sensors/LeicaLIDAR/FWMarksNotes] - Mark's notes on the Full Waveform training Jan 2010.
 * [wiki:Sensors/LeicaLIDAR/FWEmmasNotes] - Emma's notes on the Full Waveform training Jan 2010.
 * [wiki:Sensors/LeicaLIDAR/FWMikesNotes] - Mike's notes on the Full Waveform training Jan 2010.