Borden Forest Canopy Spectral Observations during the 2017 Solar Eclipse

Canopy spectral measurements were collected at the Borden Forest Research Station (44°19'N, 79°56’W) during the period Aug 20-23 2017. The spectral measurements were collected using a Unispec-DC dual channel spectrometer (PP-Systems, Amesbury MA) mounted at a height of 38m. The dataset includes measurements of reflectance and spectral indices (PRI, SIF, NDVI, EVI, NIRv, and the chlorophyll index of Maccioni 2001) at four view zenith angles (43°, 48°, 53°, 58°) and view azimuth angles ranging from 0° to 360°. The dataset also includes the same set of measurements averaged for each full cycle of the pan-tilt sequence.Data are provided as matlab tables (.mat)Time is in UTCVZA: View Zenith Angle (degrees)VAA: View Azimuth Angle (degrees)Zeta: Phase angle between view angle and solar position (degrees)PRI: Photochemical Reflectance Index (unitless)SIF: Solar Induced Fluorescence (arbitrary units)SIF Yield: SIF/PAR (arbitrary units)NDVI: Normalized Difference Vegetation Index (unitless)EVI: Enhanced Vegetation Index (unitless)NIRv: Near Infrared Reflectance of Vegetation (NIR Reflectance x NDVI) (unitless)Macc01: Chlorophyll Index of Maccioni 2001 (unitless)ref: Reflectance in each spectrometer channel (ranges from 310 to 1154nm in 3.3nm spectral sampling intervals.PAR: Photosynthetically Active Radiation determined as the integral of digital numbers accross the Unispec-DC spectrometer's full range scaled to match values measured by a LI-190 Quantum Sensor (LI-Cor, Lincoln NB) Indices-notGrouped.mat: Spectral Indices calculated for each sampling time Indices-grouped.mat: As above but averaged for each repeated cycle of the pan-tilt device.Reflectance-notgrouped.mat: Reflectance values at each sampling timeReflectance-Grouped.mat: Reflectance values repeated for each cycle of the pan-tilt unit.