Figure 14.

(a) Modelled relationship between error in an indirect SIF retrieval, the gradient of a sloped influence, and the spectral distance between a valley and a peak for an absorption feature of 0.9 proportional depth. For context, the approximate steepness of the leaf reflectivity (yellow line), and the SIF function (red line) at 730 nm, based on Figure A, are shown. Spectral distance equivalent to 1, 2, and 3 band intervals of FIREFLY (blue lines) are shown. (b) Modelled relationship between error in an indirect SIF retrieval, the gradient of a sloped influence, and the proportional depth of an absorption feature.