LIDAR calibration roll boresight issue

[mark1]

The Leica LIDAR data from calibration flight 058 2009 (and onwards) appears to suffer from a variable roll offset / boresight value that may change per line.

[mark1]

The LIDAR data collected this year from the calibration flights show variable roll boresight values. Examining opposing flight lines show across track slopes in the elevation data. See attached image as an example.

[mark1]

June 2009 calibration, 1350m altitude, point cloud elevation difference in opposing flight lines

[mark1]

This appears to have corrected itself in the September calibration.

[emca]

This issue has appeared again in the 2010 calibration data. Two calibration flights were flown, one in Heerbrugg (day 055) and one at Little Rissinton (day 060). Both data sets suffer from this variable roll issue. Email sent to Leica support 22/03/2010.

[emca]

Leica are investigating this issue

Mail recieved from Leica Support 20/04/2010

We plan to inspect the data set to understand the problem targeting to
finish this week.
2nd step for our internal side is,after this pre-analysis,we plan to go
into detail with engineering team to jump into specific area to
investigate the root cause.
 
Due to the nature of the problem,we can not tell time frame to deliver
the solution,
but we layout initial schedule to invesitage the problem.