@article{fdi:010049372, title = {{H}igh-accuracy measurements of snow bidirectional reflectance distribution function at visible and {NIR} wavelengths - comparison with modelling results}, author = {{D}umont, {M}. and {B}rissaud, {O}. and {P}icard, {G}. and {S}chmitt, {B}. and {G}allet, {J}. {C}. and {A}rnaud, {Y}ves}, editor = {}, language = {{ENG}}, abstract = {{H}igh-accuracy measurements of snow {B}idirectional {R}eflectance {D}istribution {F}unction ({BRDF}) were performed for four natural snow samples with a spectrogonio-radiometer in the 500-2600 nm wavelength range. {T}hese measurements are one of the first sets of direct snow {BRDF} values over a wide range of lighting and viewing geometry. {T}hey were compared to {BRDF} calculated with two optical models. {V}ariations of the snow anisotropy factor with lighting geometry, wavelength and snow physical properties were investigated. {R}esults show that at wavelengths with small penetration depth, scattering mainly occurs in the very top layers and the anisotropy factor is controlled by the phase function. {I}n this condition, forward scattering peak or double scattering peak is observed. {I}n contrast at shorter wavelengths, the penetration of the radiation is much deeper and the number of scattering events increases. {T}he anisotropy factor is thus nearly constant and decreases at grazing observation angles. {T}he whole dataset is available on demand from the corresponding author.}, keywords = {}, booktitle = {}, journal = {{A}tmospheric {C}hemistry and {P}hysics}, volume = {10}, numero = {5}, pages = {2507--2520}, ISSN = {1680-7316}, year = {2010}, URL = {https://www.documentation.ird.fr/hor/fdi:010049372}, }