Determination of Unfiltered Radiances from the Clouds and the Earth’s Radiant Energy System Instrument

Abstract A new method for determining unfiltered shortwave (SW), longwave (LW), and window radiances from filtered radiances measured by the Clouds and the Earth’s Radiant Energy System (CERES) satellite instrument is presented. The method uses theoretically derived regression coefficients between filtered and unfiltered radiances that are a function of viewing geometry, geotype, and whether cloud is present. Relative errors in instantaneous unfiltered radiances from this method are generally well below 1% for SW radiances (std dev ≈0.4% or ≈1 W m−2 equivalent flux), less than 0.2% for LW radiances (std dev ≈0.1% or ≈0.3 W m−2 equivalent flux), and less than 0.2% (std dev ≈0.1%) for window channel radiances. When three months (June, July, and August of 1998) of CERES Earth Radiation Budget Experiment (ERBE)-like unfiltered radiances from the Tropical Rainfall Measuring Mission satellite between 20°S and 20°N are compared with archived Earth Radiation Budget Satellite (ERBS) scanner measurements for the sa...

[1]  Patrick Minnis,et al.  Temporal Interpolation Methods for the Clouds and the Earth’s Radiant Energy System (CERES) Experiment , 1998 .

[2]  B. Barkstrom,et al.  Clouds and the Earth's Radiant Energy System (CERES): An Earth Observing System Experiment , 1996 .

[3]  Bruce R. Barkstrom,et al.  The Earth Radiation Budget Experiment (ERBE). , 1984 .

[4]  Top‐of‐atmosphere albedo estimation from angular distribution models: A comparison between two approaches , 1999 .

[5]  Tsutomu Takashima,et al.  Polarization effect on radiative transfer in planetary composite atmospheres with interacting interface , 1985 .

[6]  Solar radiance models for determination of ERBE scanner filter factor , 1985 .

[7]  E. Shettle,et al.  Models for the aerosols of the lower atmosphere and the effects of humidity variations on their optical properties , 1979 .

[8]  Richard N. Green,et al.  Validation of ERBS Scanner Radiances , 1996 .

[9]  Kriebel Kt,et al.  Measured spectral bidirectional reflection properties of four vegetated surfaces. , 1978 .

[10]  K. Stamnes,et al.  Numerically stable algorithm for discrete-ordinate-method radiative transfer in multiple scattering and emitting layered media. , 1988, Applied optics.

[11]  Robert Benjamin Lee,et al.  End-to-end spectral characterization of the Clouds and the Earth's Radiant Energy System (CERES) thermistor bolometer radiometers , 1998, Remote Sensing.

[12]  D. E. Bowker,et al.  Spectral reflectances of natural targets for use in remote sensing studies , 1985 .

[13]  Bruce A. Wielicki,et al.  Cloud Identification for ERBE Radiative Flux Retrieval , 1989 .

[14]  G. Louis Smith,et al.  The Earth Radiation Budget Experiment: Science and implementation , 1986 .

[15]  S. Warren,et al.  A Model for the Spectral Albedo of Snow. I: Pure Snow , 1980 .

[16]  Chris Currey,et al.  Validation of the CERES Shortwave Measurements over Desert and Cloud Scenes , 1999 .