Smartphone-based measurements of the optical properties of snow
| Autor: | Markus Allgaier, Brian J. Smith |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Physics - Instrumentation and Detectors
Climate Ice FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) Atomic and Molecular Physics and Optics Physics - Atmospheric and Oceanic Physics Snow Atmospheric and Oceanic Physics (physics.ao-ph) Smartphone Astrophysics::Earth and Planetary Astrophysics Electrical and Electronic Engineering Engineering (miscellaneous) Optics (physics.optics) Physics - Optics |
| Popis: | Snow is a highly complex medium composed of ice crystals of various shapes and sizes. Knowledge of its intrinsic optical properties such as scattering and absorption coefficients is tantamount to radiative transfer models in climate research. The absorption coefficient, in particular, allows us to access information about light-absorbing particles contained in the snow. In contrast to snow’s apparent properties such as the albedo, measuring the intrinsic properties is challenging. Here, we present a simple apparatus that can measure bulk optical properties of snow using readily available components and a smartphone camera, and a robust diffuse-optical framework for data analysis. We demonstrate the instrument both on scattering phantoms with known scattering and absorption coefficients and in the field. Its low cost, simplicity, and portability uniquely qualify this setup for large-scale field work, undergraduate education, and citizen science. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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