Robert O. Knuteson

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[1] The Atmospheric Infrared Sounder (AIRS) is the first of a new generation of advanced satellite-based atmospheric sounders with the capability of obtaining high–vertical resolution profiles of temperature and water vapor. The high-accuracy retrieval goals of AIRS (e.g., 1 K RMS in 1 km layers below 100 mbar for air temperature, 10% RMS in 2 km layers(More)
AFFILIATIONS: REVERCOMB, TOBIN, KNUTESON, FELTZ—University of Wisconsin—Madison, Madison, Wisconsin; TURNER, BARNARD, MORRIS—Pacific Northwest National Laboratory, Richland, Washington; BÖSENBERG, LINNÉ—Max Planck Institute for Meteorology, Hamburg, Germany; CLOUGH—Atmospheric and Environmental Research, Inc., Lexington, Massachusetts; COOK, LESHT,(More)
The surface-based Atmospheric Emitted Radiance Interferometer (AERI) is an important measurement component of the Department of Energy Atmospheric Radiation Measurement Program. The method used to retrieve temperature and moisture profiles of the plantetary boundary layer from the AERI’s downwelling spectral radiance observations is described.
The NASA New Millennium Program’s Geostationary Imaging Fourier Transform Spectrometer (GIFTS) requires highly accurate radiometric and spectral calibration in order to carry out its mission to provide water vapor, wind, temperature, and trace gas profiling from geostationary orbit. A calibration concept has been developed for the GIFTS Phase A instrument(More)
The validation of fascod3 and modtran3 against ground-based and airborne high-resolution Michelson interferometer measurements under clear-sky conditions is presented. Important considerations including water vapor continuum, frequency-dependent sea surface emissivity in the IR window region, and spectral resolution of modtran3 in the comparison of model(More)
The National Polar-Orbiting Operational Environmental Satellite System (NPOESS) Airborne Sounder Testbed (NAST) consists of two passive collocated cross-track scanning instruments, an infrared interferometer (NAST-I) and a microwave radiometer (NAST-M), that fly onboard high-altitude aircraft such as the NASA ER-2 at an altitude near 20 km. NAST-I provides(More)
[1] This paper describes 3-hourly radiosonde observations of the Saharan air layer (SAL) acquired from the NOAA Ship Ronald H. Brown during the 2004 Aerosol and Ocean Science Expedition (AEROSE). The sampling frequency allows for unique vertical cross-sectional analyses of SAL phenomena, including dust events detected by shipboard Sun photometers, observed(More)
[1] A field experiment was conducted in northern Chile at an altitude of 5.3 km to evaluate the accuracy of line-by-line radiative transfer models in regions of the spectrum that are typically opaque at sea level due to strong water vapor absorption. A suite of spectrally resolved radiance instruments collected simultaneous observations that, for the first(More)
[1] On 11 September 2000, a NASA ER-2 aircraft underflew the Terra spacecraft during the Southern Africa Regional Science Initiative (SAFARI) 2000 field experiment. The Scanning High Resolution Interferometer Sounder (S-HIS), Moderate Resolution Imaging Spectroradiometer (MODIS) Airborne Simulator (MAS), and Cloud Physics Lidar (CPL) instruments onboard the(More)
The Scanning High-resolution Interferometer Sounder (S-HIS) and the National Polar-orbiting Operational Environmental Satellite System (NPOESS) Atmospheric Sounder Testbed Interferometer (NAST-I) are new aircraft-based instruments that measure accurate infrared radiances at both high spectral and spatial resolution. The designs of both instruments are based(More)