Vicarious Calibration of the DESIS Imaging Spectrometer

Abstract

Spectral range400 nm to 1000 nm Spectral Sampling (res., acc.,bands) 2.55 nm, 0.5 nm, 235 bands. Binning: 118 , 79 , 60 bands Spectral responseGaussian shape, 3.5 nm FWHM Software Binning (sampling distance, number bands) Binning 2 (5.1 nm, 118 bands) Binning 3 (7.6 nm, 79 bands) Binning 4 (10.1 nm, 60 bands) Radiometry (res., acc.)13 bits, ~10% Spatial (res., swath) 30 m, 30 km (@ 400 km) SNR (signal-to-noise) 195 (w/o bin.) / 386 (4 bin.) @ 550 nm Instrument (mass) 93 kg Capacity (km, storage) 2360 km per day, 225 GBit DESIS TOA reflectance (0.4 nm) from RCN BOA reflectance AC inversion

Vicarious Calibration of The Desis Imaging Spectrometer: Status and Plans

“…The main updates are performed on the radiometric calibration coefficients using our vicarious calibration method [7].…”

“…Examples of these areas are the CEOS PICS sites, although in our case temporal stability is not required for the scenes. These data are averaged on the along-track direction to obtain a mean focal plane response for each scene that is later used in a sequence of processing steps (for more details see [7]) to achieve the equalization of the sensor response.…”

Intercomparison of Landsat Operational Land Imager and Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer Radiometric Calibrations Using Radiometric Calibration Network Data

“…A reliable, high-precision radiometric calibration coefficient for the GF-7 satellite sensor has been obtained using RadCalNet's Baotou site [7]. Calibration techniques used for the DESIS instrument with a special emphasis on vicarious calibration over RadCalNet's calibration sites have been described elsewhere [8].…”