Calibration of Earth observing spectral imagers vicariously and with a controlled ground-based array

Two recent projects at Spectral Sciences Inc. have a goal of benefiting the calibration of overhead optical sensors. In the first, we have developed a vicarious calibration method that utilizes our MODTRAN software, the recognized standard for radiative transport. In the second, we are developing a new array of thermally controlled, square, spectrally characterized panels to support accurate calibration of imagers in the visible through long wavelength infrared (LWIR). Progress and results of both efforts will be described.