Results 271 to 280 of about 556,737 (306)

Tree-heights derived from radar profiles over boreal forests

Agricultural and Forest Meteorology, 1999
In this paper, results are presented from NOPEX-measurements over boreal forests using an helicopter-borne multi-band radar profiler. Comparisons are made between tree height profiling responses at three different frequency bands (5, 14 and 35 GHz). Values derived from radar profiles are also compared with maximum tree-height and stem volume per ha ...
S.R.J. Axelsson, M. Eriksson, S. Halldin
openaire   +1 more source

Extinction threshold for spatial forest dynamics with height structure

Journal of Theoretical Biology, 2011
We present a pair-approximation model for spatial forest dynamics defined on a regular lattice. The model assumes three possible states for a lattice site: empty (gap site), occupied by an immature tree, and occupied by a mature tree, and considers three nonlinearities in the dynamics associated to the processes of light interference, gap expansion ...
Garcia Domingo, Josep Lluís, Saldaña, Joan   +1 more
openaire   +4 more sources

Forest Height Estimation in Tropical Rain Forest using Pol-InSAR Techniques

2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
Tropical rain forest environments are highly complex and heterogeneous in terms of species composition and structure and is often difficult to access. Radar remote sensing is for large tropical regions the only available information source for monitoring.
K. Florian, P. Kostas, H. Irena, H. Dirk
openaire   +1 more source

A comparison between various definitions of forest stand height and aerodynamic canopy height

Agricultural and Forest Meteorology, 2010
A consistent measure of forest canopy height is required for among-site comparisons of meteorological properties and for comparison of model results such as distributions of wind and other scalars calculated by large eddy simulations with observations.
Taro Nakai, Akihiro Sumida, Yuji Kodama, Toshihiko Hara, Takeshi Ohta   +4 more
openaire   +1 more source

Forest height inversion based on polarimetric SAR interferometry

2008 9th International Conference on Signal Processing, 2008
To extract the forest height accurately and quickly based on polarimetric SAR interferometry, a forest height inversion method is proposed, based on the polarimetric interferometric model (PolIn-model). A credit (linearity measurement) of height inversion is introduced.
null Guang-yi Zhou, null Tao Xiong, null Jian Yang, null Wei-jie Zhang   +3 more
openaire   +1 more source

Measuring forest height from space. Opportunities and limitations observed in natural forests

Measurement, 2022
Gabriela Baban, Mihai Daniel Niţă
openaire   +1 more source

Height growth–rate at a given height: A mathematical perspective for forest productivity

Ecological Modelling, 2020
Abstract Understanding the height growth of trees is a fundamental component for scientific knowledge and management of forest ecosystems. The height of dominant trees at a reference-age, commonly known as the site-index, is the most widely used forest productivity indicator globally.
openaire   +1 more source

Limit Distributions of the Height of a Random Forest

Theory of Probability & Its Applications, 1984
Translation from Teor. Veroyatn. Primen. 28, No.3, 449-457 (Russian) (1983; Zbl 0513.60036).
openaire   +2 more sources

Forest height maps from NAIP?

2018
true (Invited?)
openaire   +1 more source

Integrative oncology: Addressing the global challenges of cancer prevention and treatment

Ca-A Cancer Journal for Clinicians, 2022
Jun J Mao,, Msce, Lorenzo Cohen, Karen M Mustian   +2 more
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