Multi-stand radar modeling from a boreal forest: Results from the BOREAS Intensive Field Campaign-1993

摘要: A Boreal Ecosystem Atmosphere Study (BOREAS) Intensive Field Campaign was conducted in August 1993 to study portions of the Canadian boreal forest. The overall project has a strong remote sensing and modeling component assess monitor important ecosystem attributes as they relate carbon, water energy fluxes. objective work is capabilities multi-frequency multi-polarization synthetic aperture radar (SAR) remotely sense forest stands different species age. NASA/JPL's airborne SAR flown over forested areas reasonably pure old young aspen (broad-leaf) jack pine (needle-leaf) trees. Ground truth, stand characteristics tree architecture data were collected period experiment from four (one for each age type). L C-band portable dielectric probes used measure properties model parameters have been derived this set. They GWU vegetation compute backscattering coefficients. At L-band, calculations show that large HH backscatter due double bounce scattering trunks while VV arises direct canopy. It also observed L-band like cross polarization ratios tracked biomass stands. These findings confirmed by comparison with AIRSAR data. >