Figure 16.

(a) An example FIREFLY vegetation spectra (black line) with a simulated SIF signal (green dashed line, not to scale). Each panel highlights a spectral region that might require different assumptions or supporting information: The top panel shows oxygen B (pink) and oxygen A (red); the middle panel shows sloped leaf reflectance (yellow) and the region where SIF can be expected to be polynomial in shape (green); the bottom panel shows the region subject to the influence of water vapor (blue); and all panels show the narrow regions (gray) not included in any other spectral region. (b) The number of solar absorption features found across the spatial dimension of FIREFLY, if each spectral region is excluded (line colors correspond to regions in (a), with red incorporating both oxygen A and oxygen B regions).