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Fig. 1
The general Oren and Nayar (1995) model of the diurnal albedo variation.
Fig. 2
The model fitting procedure. (A) Point data generated from Eq. (3); (B) fitting Eq. (4) to points; (C) model correction.
Fig. 3
Scheme of calculation implemented in SALBEC. For symbol explanation, see text. SALBEC, Soil ALBEdo Calculator.
Fig. 4
The architecture of SALBEC software. SALBEC, Soil ALBEdo Calculator.
Fig. 5
Visualisation of the results. (A) Location-agnostic soil-surface albedo model produced by the soil surface albedo module (Calcic Xerosol); (B) Diurnal a variation produced by the diurnal albedo module (Calcic Xerosol).
Fig. 6
GUI of SALBEC: (A) main window – results of the calculations; (B1) ribbon – soil section; (B2) geo-location; (B3) days of the analysis; (C1) spectra manager and (C2) collection manager. GUI, graphic user interface; SALBEC, Soil ALBEdo Calculator.
Fig. 7
Laboratory reflectance spectra of Haplic Xerosol and Calcic Xerosol used in the example.
Fig. 8
A comparison between the measured a under field conditions and the clear-sky a modelled using SALBEC. SALBEC, Soil ALBEdo Calculator.