Fig. 7From: TSWIFT: Tower Spectrometer on Wheels for Investigating Frequent Timeseries for high-throughput phenotyping of vegetation physiologyExploring sun-sensor phase angle effects on soil targets from June 1 to June 15 for bands used for NDVI (a, b, c), PRI (d, e, f), and SIF (g, h, i) calculations. Color represents hour of day and red line represents LOESS fitting to highlight overall patternBack to article page