Changes between Version 2 and Version 3 of Sensors/LeicaLIDAR/FWMarksNotes


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Timestamp:
Jan 26, 2010 10:27:01 AM (9 years ago)
Author:
mark1
Comment:

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  • Sensors/LeicaLIDAR/FWMarksNotes

    v2 v3  
    66 * The digitiser starts recording from the first returned peak for the number of required samples (256/128 @ 1ns or 256/128/64 @ 2ns)
    77  * If first return is noise (cloud/seagull) then the digitiser will start recording there and not at the target.
     8  * measured heights / distances for different sampling rates:
     9
     10    || Sample rate || equivalent height ||
     11    || 256 @ 1ns   || 38.4m ||
     12    || 128 @ 1ns   || 19.2m ||
     13    || 256 @ 2ns   || 76.8m ||
     14    || 128 @ 2ns   || 38.4m ||
     15    || 64 @ 2ns    || 19.2m ||
     16
    817 * Benefits of full waveform
    918  * Better idea of the nature of the return e.g. tree canopy height is more accurate than from 1 discrete point
     
    1827 * ALSPP outputs in LAS 1.3 format
    1928 * Includes a simple waveform viewer
     29  * Displays waveform and discrete points
     30  * There is a "constant" timing offset between the waveform and discrete points - thought to be due to processing time