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

Timestamp:

Aug 26, 2008, 3:26:47 PM (17 years ago)

Author:

mggr

Comment:

--

Sensors/LeicaLIDAR/MikesNotes

@@ -31 +31 @@
 
 Consider terrain and minimum target size to determine required point density.  Steep terrain may cause shadowing effects due to perspective.
+
+Consider 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..).
 
 == Overall system design and comments of note ==
@@ -87 +89 @@
 
 Perform calibrations frequently at the start of the period to get a feel for how they hold.  Reduce down to fit circumstances over time.
+
+== Required items for processing ==
+
+Items required from every flight:
+ * GPS/IMU data
+ * Raw laser data
+ * Logfiles from LIDAR
+   * Flight logfiles are useful too, if the LIDAR flight planning software is used
+ * RCD & webcam images
+
+Items required in general:
+ * calibration (see elsewhere)
+ * lever arm measurements
+
+== Parameters needing calibration ==
+
+Lever arm measurements:
+ * IMU -> sensor head
+   * Measured in the factory and provided by Leica
+ * IMU -> measurement point [front left corner of the casing]
+   * Measured in factory and provided by Leica
+ * measurement point -> GPS antenna centre
+   * '''We need to measure this one.'''
+
+Intensity Based Range Correction (IBRC).
+ * A correction based on the reflectivity of the target object ("reflections are slower on darker objects"?).
+ * Measured in factory and provided by Leica.
+