[1] Global space borne lidar profiling of atmospheric clouds and aerosol began in 2003 following the launch of the Geoscience Laser Altimeter System (GLAS) on the Ice, Cloud and land Elevation Satellite. GLAS obtains nadir profiles through the atmosphere in two wavelength channels, day and night, at a fundamental resolution of 76.8 m vertical and 172 m along track. The 532 nm channel uses photo...

A methodology to generate spatially continuous fields of tree heights with an optimized Allometric Scaling and Resource Limitations (ASRL) model is reported in this first of a multi-part series of articles. Model optimization is performed with the Geoscience Laser Altimeter System (GLAS) waveform data. This methodology is demonstrated by mapping tree heights over forested lands in the continent...

Missing responses resulting from omitted or not-reached items are beyond researchers’ control and potentially threaten the validity of test results. Empirical evidence concerning the relationship between missingness and test takers’ performance on the test have suggested that the missing data mechanism is nonignorable and needs to be taken into account. Various IRT-based models for nonignorable...

The Geoscience Laser Altimeter System aboard NASA’s Ice, Cloud and land Elevation Satellite will record the height distribution of laser energy reflected from surfaces within 70 m diameter footprints. For land surfaces, post-processing of this waveform data will be used to estimate the within-footprint mean elevation and surface relief due to ground slope and roughness, vegetation cover, buildi...

Address for correspondence: Niklaus P. Lang, Prof. Dr. Dr. h.c., M.S., FRCPS (Glas.) Zahnmedizinische Kliniken der Universität Bern, Freiburgstrasse 7, CH 3010 Bern Tel.: 031 632 25 77, Fax: 031 632 49 15 NIKLAUS P. LANG, ANDREAS JOSS, CLAUDIA SAXER, BEAT WALLKAMM, URS BRÄGGER, ERNST SCHÜRCH jr., DOMINIK HOFER, BRUNO SCHMID, STEFAN LUTERBACHER, THOMAS ETTER, MORTEN M. CHRISTENSEN and ROLF ATTSTRÖM

Spatially-detailed forest height data are useful to monitor local, regional and global carbon cycle. LiDAR remote sensing can measure three-dimensional forest features but generating spatially-contiguous forest height maps at a large scale (e.g., continental and global) is problematic because existing LiDAR instruments are still data-limited and expensive. This paper proposes a new approach bas...

Spatially-explicit maps of aboveground biomass are essential for calculating the losses and gains in forest carbon at a regional to national level. The production of such maps across wide areas will become increasingly necessary as international efforts to protect primary forests, such as the REDD+ (Reducing Emissions from Deforestation and forest Degradation) mechanism, come into effect, along...

SADRŽAJ Umesto predgovora: Iz izveštaja “EFT – energetska mafija” ...........................................................................1 Umesto uvoda: Vladimir Popović Beba o tajkunskoj državi .............................................................................3 21-22.02.2004 ‘Danas’.....................................................................................................