1. Satlantic HyperPro II Freefalling hyperspectral radiometer Can be deployed in “floater” mode 16 bit ADC at 12 Hz (maximum) 0 - ~100 m depth rating, descent rate ~ 0.5 m/s ECO puck: 470 & 650 nm 117° b b (msr -1 ) and fluorescence (RFU) using 470 nm excitation CTD: Accuracy of 0.005 °C, 0.005 mS/cm, 0.0435 bar (m) Radiometers: E d, L u, E s 350.5-796.5 nm (137 channels, ~3.3 nm) - Spectral accuracy: 0.3 nm; Spectral resolution: 10 nm - Stray Light: < 1E-3 1)Primary geophysical parameters: RADIANCE/IRRADIANCE (µW cm -2 s -1 sr -1 ) 2)Primary Products: L w, R rs, K, PAR, vertical profiles of T, S, b b, RFU 3)Based on Lu, Ed, Es, T, conductivity, scattering, and fluorescence

2. Satlantic HyperPro II Corrections: – No correction for b b, but should be sigma-corrected if the data are being used quantitatively – RFU calibrated against extracted chlorophyll – CTD compared to SBE-19 or SBE-26 Radiometer Corrections: – Using ProSoft 7.7.15 from Level 1 to Level 4 (note that v8 exists, but is not generally available from Satlantic) – Instrument calibrated annually, using manufacturer calibration functions for conversion of raw to geophysical data

3. Satlantic HyperPro II L1 to L2 – Raw data has calibration file factors applied – Dark correction (shutter dark or calibration file) L2 to L2s – Interpolated onto depth and/or time L2s to L3a – Data are binned (typically 0.5 m depth intervals, 2s) – tilt (5°) and velocity (0.5 m/s) filters applied – Dark correction applied (either shutter or CAL) – Wavelength interpolation applied (we usually leave OFF) L3a: vertical profiles of T, S, b, FLUOR, time-binned Es

4. Satlantic HyperPro II L3a to L4 – Extrapolation of subsurface and surface data # integration points Reflection Albedo = 0.043 Reflectance Index = 0.021 Refractive Index = 1.345 ET Solar Irradiance = Neckel & Labs – Options for K( ), Lw, [Lw]N, R, Rrs, PAR, chlorophyll estimates, vertical energy fluxes, water properties, backscattering

5. Satlantic HyperPro II Objective Constraints: – Es compared to Ed(0+) – Tilt, descent rate filtering – Es normalization compared to Ed(0+) normalization Subjective Constraints: – Must set interpolation interval, binning intervals – 3 consecutive casts, “best” one(s) chosen

6. Satlantic HyperPro II Lab Characterization – Annual vendor calibration – Stray light correction not applied – Immersion factor, cosine response provided by vendor Field Characterization – Deck pressure-tared (known offsets) – Shutter darks enabled, usually collect instrument darks also, compared to CAL darks – CTD, RFU compared to other measurements

7. Satlantic HyperPro II Uncertainty – Data quality questionable below ~400 nm and above ~750 nm – Calibration errors, drift – Differences in processing Protocols No self-shading correction Software defaults to the same interpolation depth for all wavelengths – No straylight or thermal corrections (available in v8) – No multicast capability (available in v8) – Corrections generally designed for Case 1 waters Publications – Manuals from Satlantic – Ocean Optics Protocols