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A platform for research: civil engineering, architecture and urbanism
Continuous bidirectional reflectance (BRF) measurement of snow using monochromatic camera
Abstract An approach of using monochromatic camera for observation of the principal plane bidirectional reflectance characteristics of snow is presented. The photos are continuously taken at nadir view with an interval of 1 min. The mean intensity of the photos is used to observe the relative dependence of the reflectance of snow on the solar zenith angle (SZA). Both the decrease of the snow bidirectional reflectance and its diurnal asymmetry with respect to the SZA during the melting season are demonstrated.
Highlights An inexpensive automatic camera system to continuously observe the bidirectional reflectance (BRF) characteristics of snow surface is demonstrated. The symmetric diurnal BRF of midwinter conditions and the asymmetric diurnal BRF of melting season are observed. Continuous measurements can provide BRF validation data for simultaneous cloud-free high resolution satellite overpasses by attaching the camera to a higher altitude.
Continuous bidirectional reflectance (BRF) measurement of snow using monochromatic camera
Abstract An approach of using monochromatic camera for observation of the principal plane bidirectional reflectance characteristics of snow is presented. The photos are continuously taken at nadir view with an interval of 1 min. The mean intensity of the photos is used to observe the relative dependence of the reflectance of snow on the solar zenith angle (SZA). Both the decrease of the snow bidirectional reflectance and its diurnal asymmetry with respect to the SZA during the melting season are demonstrated.
Highlights An inexpensive automatic camera system to continuously observe the bidirectional reflectance (BRF) characteristics of snow surface is demonstrated. The symmetric diurnal BRF of midwinter conditions and the asymmetric diurnal BRF of melting season are observed. Continuous measurements can provide BRF validation data for simultaneous cloud-free high resolution satellite overpasses by attaching the camera to a higher altitude.
Continuous bidirectional reflectance (BRF) measurement of snow using monochromatic camera
Manninen, Terhikki (author) / Anttila, Kati (author) / Pirazzini, Roberta (author) / Räisänen, Petri (author) / Leppänen, Leena (author) / Kontu, Anna (author) / Peltoniemi, Jouni (author)
2022-02-06
Article (Journal)
Electronic Resource
English
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