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Talks and Poster Presentations (without Proceedings-Entry):

A. Ullrich, C. Briese:
"Radiometric Calibration of LIDAR instruments and LIDAR data";
Talk: EuroCOW 2014, Castelldefels, Spain; 2014-02-12 - 2014-02-14.



English abstract:
Airborne laser scanning systems (ALS) allow dense sampling of the earthīs surface and provide highly accurate and precise point clouds, not just containing geometric information, but also attributes for each point such as information about the signal strength of each echo. By calibration of the LIDAR instrument, the actual echo amplitude in the electrical regime of the receiver is translated into a corresponding calibrated amplitude reading for each echo. By an additional calibration step, the amplitude and range readings for each echo can be used to estimate the so-called normalized laser radar cross-section, delivered by RIEGLīs LIDAR instrument as reflectance estimate. Based on these estimates physical observables for the backscatter characteristic of the sensed surface are available. By combination of ALS LIDAR instruments utilizing different laser wavelengths orthopotos at specific narrow wavelengths or even multi-wavelength orthophotos of the scene can be generated. We demonstrate data acquired at the wavelengths 532nm, 1064nm, and 1550nm.

Created from the Publication Database of the Vienna University of Technology.