Publication Abstracts

Marshak et al. 2018

Marshak, A., J. Herman, A. Szabo, K. Blank, A. Cede, S. Carn, I. Geogdzhayev, D. Huang, L.-K. Huang, Y. Knyazikhin, M. Kowalewski, N. Krotkov, A. Lyapustin, R. McPeters, O. Torres, and Y. Yang, 2018: Earth observations from DSCOVR/EPIC instrument. Bull. Amer. Meteorol Soc., 99, no. 9, 1829-1850, doi:10.1175/BAMS-D-17-0223.1.

The NOAA Deep Space Climate Observatory (DSCOVR) spacecraft was launched on February 11, 2015, and in June 2015 achieved its orbit at the first Lagrange point or L1, 1.5 million km from Earth towards the Sun. There are two NASA Earth observing instruments onboard: the Earth Polychromatic Imaging Camera (EPIC) and the National Institute of Standards and Technology Advanced Radiometer (NISTAR). The purpose of this paper is to describe various capabilities of the DSCOVR/EPIC instrument. EPIC views the entire sunlit Earth from sunrise to sunset at the backscattering direction (scattering angles between 168.5° and 175.5°) with 10 narrowband filters: 317, 325, 340, 388, 443, 552, 680, 688, 764 and 779 nm. We discuss a number of pre-processing steps necessary for EPIC calibration including the geolocation algorithm and the radiometric calibration for each wavelength channel in terms of EPIC counts/second for conversion to reflectance units. The principal EPIC products are total ozone O3 amount, scene reflectivity, erythemal irradiance, UV aerosol properties, sulfur dioxide SO2 for volcanic eruptions, surface spectral reflectance, vegetation properties, and cloud products including cloud height. Finally, we describe the observation of horizontally oriented ice crystals in clouds and the unexpected use of the O2 B-band absorption for vegetation properties.

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BibTeX Citation

@article{ma01410l,
  author={Marshak, A. and Herman, J. and Szabo, A. and Blank, K. and Cede, A. and Carn, S. and Geogdzhayev, I. and Huang, D. and Huang, L.-K. and Knyazikhin, Y. and Kowalewski, M. and Krotkov, N. and Lyapustin, A. and McPeters, R. and Torres, O. and Yang, Y.},
  title={Earth observations from DSCOVR/EPIC instrument},
  year={2018},
  journal={Bull. Amer. Meteorol Soc.},
  volume={99},
  number={9},
  pages={1829--1850},
  doi={10.1175/BAMS-D-17-0223.1},
}

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RIS Citation

TY  - JOUR
ID  - ma01410l
AU  - Marshak, A.
AU  - Herman, J.
AU  - Szabo, A.
AU  - Blank, K.
AU  - Cede, A.
AU  - Carn, S.
AU  - Geogdzhayev, I.
AU  - Huang, D.
AU  - Huang, L.-K.
AU  - Knyazikhin, Y.
AU  - Kowalewski, M.
AU  - Krotkov, N.
AU  - Lyapustin, A.
AU  - McPeters, R.
AU  - Torres, O.
AU  - Yang, Y.
PY  - 2018
TI  - Earth observations from DSCOVR/EPIC instrument
JA  - Bull. Amer. Meteorol Soc.
VL  - 99
IS  - 9
SP  - 1829
EP  - 1850
DO  - 10.1175/BAMS-D-17-0223.1
ER  -

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