Principles of the radiosity method for canopy reflectance modeling

Conference · Thu Mar 01 04:00:00 EST 1990

DOI:https://doi.org/10.1109/IGARSS.1990.688850· OSTI ID:6970369

Gerstl, S A.W.; Borel, C C

The radiosity method is introduced to plant canopy reflectance modeling. We review the physics principles of the radiosity method which originates in thermal radiative transfer analyses when hot and cold surfaces are considered within a given enclosure. The radiosity equation, which is an energy balance equation for discrete surfaces, is described and contrasted with the radiative transfer equation, which is a volumetric energy balance equation. Comparing the strengths and weaknesses of the radiosity method and the radiative transfer method, we conclude that both methods are complementary to each other. Results of sample calculations are given for canopy models with up to 20,000 discrete leaves. 16 refs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: NASA
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6970369
• Report Number(s): LA-UR-90-782; CONF-900567--3; ON: DE90008943
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
54 ENVIRONMENTAL SCIENCES
540210 -- Environment
Terrestrial-- Basic Studies-- (1990-)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ACCURACY
ADSORPTION
AIR
CANOPIES
COMPUTER GRAPHICS
COMPUTERIZED SIMULATION
DATA PROCESSING
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
FLUIDS
FLUX DENSITY
FREQUENCY ANALYSIS
GASES
HEAT FLUX
HETEROGENEOUS EFFECTS
IMAGE PROCESSING
INFRARED SPECTRA
MEASURING METHODS
MODIFICATIONS
MONTE CARLO METHOD
OPTICAL PROPERTIES
OPTIMIZATION
PHYSICAL PROPERTIES
PLANTS
PROCESSING
RADIATIONS
REFLECTIVITY
SCATTERING
SIMULATION
SORPTION
SPECTRA
SURFACE PROPERTIES
TECHNOLOGY ASSESSMENT
THERMAL RADIATION