Hyperspectral Terminology

Hyperspectral Remote Sensing, Eismann Chapter 7, Dispersive Spectrometer Design and Analysis Aperture diameter Effective focal length f-number Slit width Detector width Spectrometer magnification Spectral range Spectral resolution Number of spectral channels Maximum frame rate Digitization *SNR or NESR (noise equivalent spectral radiance) Examples listed for these sensors (parameters vary by sensor): AVIRIS HYDICE Hyperion COMPASS SEBASS AHI

Feasibility of a standard for full specification of spectral imager performance, SPIE 2017 Torbjørn Skauli

Skauli, continued

Best Practices in Passive Remote Sensing VNIR Hyperspectral System Hardware Calibrations Joseph Jablonski, Christopher Durell, Terrence Slonecker, Kwok Wong Blair Simon, Andrew Eichelberger, Jacob Osterberg Characterization helps in evaluating design performance and specifying instruments based on requirements Suggested specification that each imager should aspire to give the user: Architecture of the spectrometer: Diffraction, Prism, etc. Number of Pixels / Spatial Resolution (columns and rows) Spectral Range (ex: 400 to 1100 nm) – usable range Signal-to-Noise over the Spectral Range Spectral Sampling / Number of bands (ex: 5 nm/140 bands) Spectral Resolution / Spectral Bandwidth Radiance Responsivity (W/sr-m2-nm)/(counts/sec) Radiometric / Wavelength Accuracy over full range Smile & Keystone, PSF

Worksheet of parameters Example Description Method of determination Mathematical description References Synonym/Confusion Spectral range 400 nm to 1100 nm the usable spectral range umber of bands (ex: 5 nm/140 bands) Spectral Sampling, resolution Signal-to-noise 1000 at 900 nm SNR = (µ/σ)λ Stray Light