Changes between Version 7 and Version 8 of Sensors/LeicaLIDAR


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Timestamp:
Feb 22, 2012 2:48:04 PM (7 years ago)
Author:
mark1
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  • Sensors/LeicaLIDAR

    v7 v8  
    33The ARSF LiDAR system, for data collected in 2009 onwards, is a Leica ALS50-II. This includes a full waveform upgrade for 2010 onwards.
    44
    5 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).
     5The ALS50-II operates with a 8W class 4 laser with 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). A minimum time separation between two returns means the minimum distance between two returns must be at least 2.7m for them to be counted as independent.
     6
     7== Specification summary ==
     8
     9A lot of the system specs can be (and are) changed to tailor for individual flight purposes. If you need to know certain parameters that have been used for a specific flight that are not included in the delivery documents then please [wiki:ContactUs contact us].
     10
     11|| Wavelength (nm) || 1064 ||
     12|| Max FOV (degrees) || 75 ||
     13|| laser power || 0-8W (controlled by operator) ||
    614
    715
     16== Raw data format ==
    817
     18In the form of binary "SCN" files, which contains the raw data using compression and bit-masking. Can be viewed using the Leica SCNviewer graphical interface that comes with the Leica processing software. The files contain data records of ~32 bytes for each point.
    919
    1020== Further Information ==