Changes between Version 5 and Version 6 of Sensors/LeicaLIDAR/MikesNotes


Ignore:
Timestamp:
Aug 26, 2008 3:26:47 PM (10 years ago)
Author:
mggr
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • Sensors/LeicaLIDAR/MikesNotes

    v5 v6  
    3131
    3232Consider terrain and minimum target size to determine required point density.  Steep terrain may cause shadowing effects due to perspective.
     33
     34Consider reflectivity of surface - lighter surfaces need less laser power (too high a power means overflows on the reflection, though AGC should deal with this for the most part..).
    3335
    3436== Overall system design and comments of note ==
     
    8789
    8890Perform calibrations frequently at the start of the period to get a feel for how they hold.  Reduce down to fit circumstances over time.
     91
     92== Required items for processing ==
     93
     94Items required from every flight:
     95 * GPS/IMU data
     96 * Raw laser data
     97 * Logfiles from LIDAR
     98   * Flight logfiles are useful too, if the LIDAR flight planning software is used
     99 * RCD & webcam images
     100
     101Items required in general:
     102 * calibration (see elsewhere)
     103 * lever arm measurements
     104
     105== Parameters needing calibration ==
     106
     107Lever arm measurements:
     108 * IMU -> sensor head
     109   * Measured in the factory and provided by Leica
     110 * IMU -> measurement point [front left corner of the casing]
     111   * Measured in factory and provided by Leica
     112 * measurement point -> GPS antenna centre
     113   * '''We need to measure this one.'''
     114
     115Intensity Based Range Correction (IBRC).
     116 * A correction based on the reflectivity of the target object ("reflections are slower on darker objects"?).
     117 * Measured in factory and provided by Leica.
     118