The Experts below are selected from a list of 228 Experts worldwide ranked by ideXlab platform

Scott D. Ellington - One of the best experts on this subject based on the ideXlab platform.

  • Validation of Atmospheric InfraRed Sounder (AIRS) Spectral Radiances with the Scanning High-resolution Interferometer Sounder (S-HIS) aircraft instrument
    2014
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, W. Werner, R. G. Dedecker
    Abstract:

    The ability to accurately validate high spectral resolution IR radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on a 21 November 2002 under-flight of the AIRS on the NASA Aqua Spacecraft by the S-HIS on the NASA ER-2 high altitude aircraft and resulted in brightness temperature differences approaching 0.1K for most of the spectrum! Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft

  • radiometric and spectral validation of atmospheric infrared sounder observations with the aircraft based scanning high resolution interferometer sounder
    Journal of Geophysical Research, 2006
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, R. G. Dedecker, Nick N Ciganovich, Steven Dutcher, Scott D. Ellington
    Abstract:

    [1] The ability to accurately validate high–spectral resolution infrared radiance measurements from space using comparisons with a high-altitude aircraft spectrometer has been successfully demonstrated. The demonstration is based on a 21 November 2002 underflight of the AIRS on the NASA Aqua Spacecraft by the Scanning-HIS on the NASA ER-2 high-altitude aircraft. A comparison technique which accounts for the different viewing geometries and spectral characteristics of the two sensors is introduced, and accurate comparisons are made for AIRS channels throughout the infrared spectrum. Resulting brightness temperature differences are found to be 0.2 K or less for most channels. Both the AIRS and the Scanning-HIS calibrations are expected to be very accurate (formal 3-sigma estimates are better than 1 K absolute brightness temperature for a wide range of scene temperatures), because high spectral resolution offers inherent advantages for absolute calibration and because they make use of high-emissivity cavity blackbodies as onboard radiometric references. AIRS also has the added advantage of a cold space view, and the Scanning-HIS calibration has recently benefited from the availability of a zenith view from high-altitude flights. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecraft (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft. It is expected that aircraft flights of the Scanning-HIS and its close cousin the NPOESS Airborne Sounder Test Bed (NAST) will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the missions.

  • Performance of an infrared sounder on several airborne platforms : the Scanning High Resolution Interferometer Sounder (S-HIS)
    Earth Observing Systems X, 2005
    Co-Authors: Joe K. Taylor, Robert O. Knuteson, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Nick N Ciganovich, Steven Dutcher, Raymond K. Garcia, H. B. Howell, Shaima L. Nasiri
    Abstract:

    A comparison of S-HIS instrument performance on various airborne platforms, and during ground characterization is presented. Specific emphasis is placed on instrument improvements, 1998 to present day, and the engineering lessons learned. Also discussed is the ability to accurately validate high spectral resolution IR radiance measurements from space using comparisons with aircraft spectrometer observations. Aircraft comparisons of this type provide a mechanism for periodically verifying expected absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for achieving the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua, Aura).

  • Highly accurate FTIR observations from the Scanning HIS aircraft instrument
    Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, 2005
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Paul Van Delst, Daniel D. Laporte, Scott D. Ellington, Mark W. Werner, R. G. Dedecker
    Abstract:

    Development in the mid 80s of the High-resolution Interferometer Sounder (HIS) instrument for the high altitude NASA ER2 aircraft demonstrated the capability for advanced atmospheric temperature and water vapor sounding and set the stage for new satellite Instruments that are now becoming a reality [AIRS(2002), CrIS(2006), IASI(2006), GIFTS(200?), HES(2013)]. Follow-on developments at the University of Wisconsin that employ Fourier Transform Infrared (FTIR) for Earth observations include the ground-based Atmospheric Emitted Radiance Interferometer (AERI) and the new Scanning HIS aircraft instrument. The Scanning HIS is a smaller version of the original HIS that uses cross-track scanning to enhance spatial coverage. Scanning HIS and its close cousin, the NPOESS Airborne Sounder Testbed (NAST), are being used for satellite instrument validation and for atmospheric research. A novel detector configuration on Scanning HIS allows the incorporation of a single focal plane and cooler with three or four spectral bands that view the same spot on the ground. The calibration accuracy of the S-HIS and results from recent field campaigns are presented, including validation comparisons with the NASA EOS infrared observations (AIRS and MODIS). Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. It is expected that aircraft flights of the S-HIS and the NAST will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the mission.

  • validation of atmospheric infrared sounder airs spectral radiances with the scanning high resolution interferometer sounder s his aircraft instrument
    Remote Sensing, 2004
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, Chris Moeller, Mark Werner
    Abstract:

    The ability to accurately validate high spectral resolution infrared radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on an under-flight of the Atmospheric Infrared Sounder (AIRS) on the NASA Aqua Spacecraft by the Scanning High resolution Interferometer Sounder (S-HIS) on the NASA ER-2 high altitude aircraft on 21 November 2002 and resulted in brightness temperature differences approaching 0.1K for most of the spectrum. This paper presents the details of this AIRS/S-HIS validation case and also presents comparisons of Aqua AIRS and Moderate Resolution Imaging Spectroradiometer (MODIS) radiance observations. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations. It is expected that aircraft flights of the S-HIS and its close cousin the National Polar Orbiting Environmental Satellite System (NPOESS) Atmospheric Sounder Testbed (NAST) will be used to check the long-term stability of the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the follow-on complement of operational Instruments, including the Cross-track Infrared Sounder (CrIS).

William L Smith - One of the best experts on this subject based on the ideXlab platform.

  • Validation of Atmospheric InfraRed Sounder (AIRS) Spectral Radiances with the Scanning High-resolution Interferometer Sounder (S-HIS) aircraft instrument
    2014
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, W. Werner, R. G. Dedecker
    Abstract:

    The ability to accurately validate high spectral resolution IR radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on a 21 November 2002 under-flight of the AIRS on the NASA Aqua Spacecraft by the S-HIS on the NASA ER-2 high altitude aircraft and resulted in brightness temperature differences approaching 0.1K for most of the spectrum! Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft

  • radiometric and spectral validation of atmospheric infrared sounder observations with the aircraft based scanning high resolution interferometer sounder
    Journal of Geophysical Research, 2006
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, R. G. Dedecker, Nick N Ciganovich, Steven Dutcher, Scott D. Ellington
    Abstract:

    [1] The ability to accurately validate high–spectral resolution infrared radiance measurements from space using comparisons with a high-altitude aircraft spectrometer has been successfully demonstrated. The demonstration is based on a 21 November 2002 underflight of the AIRS on the NASA Aqua Spacecraft by the Scanning-HIS on the NASA ER-2 high-altitude aircraft. A comparison technique which accounts for the different viewing geometries and spectral characteristics of the two sensors is introduced, and accurate comparisons are made for AIRS channels throughout the infrared spectrum. Resulting brightness temperature differences are found to be 0.2 K or less for most channels. Both the AIRS and the Scanning-HIS calibrations are expected to be very accurate (formal 3-sigma estimates are better than 1 K absolute brightness temperature for a wide range of scene temperatures), because high spectral resolution offers inherent advantages for absolute calibration and because they make use of high-emissivity cavity blackbodies as onboard radiometric references. AIRS also has the added advantage of a cold space view, and the Scanning-HIS calibration has recently benefited from the availability of a zenith view from high-altitude flights. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecraft (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft. It is expected that aircraft flights of the Scanning-HIS and its close cousin the NPOESS Airborne Sounder Test Bed (NAST) will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the missions.

  • Highly accurate FTIR observations from the Scanning HIS aircraft instrument
    Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, 2005
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Paul Van Delst, Daniel D. Laporte, Scott D. Ellington, Mark W. Werner, R. G. Dedecker
    Abstract:

    Development in the mid 80s of the High-resolution Interferometer Sounder (HIS) instrument for the high altitude NASA ER2 aircraft demonstrated the capability for advanced atmospheric temperature and water vapor sounding and set the stage for new satellite Instruments that are now becoming a reality [AIRS(2002), CrIS(2006), IASI(2006), GIFTS(200?), HES(2013)]. Follow-on developments at the University of Wisconsin that employ Fourier Transform Infrared (FTIR) for Earth observations include the ground-based Atmospheric Emitted Radiance Interferometer (AERI) and the new Scanning HIS aircraft instrument. The Scanning HIS is a smaller version of the original HIS that uses cross-track scanning to enhance spatial coverage. Scanning HIS and its close cousin, the NPOESS Airborne Sounder Testbed (NAST), are being used for satellite instrument validation and for atmospheric research. A novel detector configuration on Scanning HIS allows the incorporation of a single focal plane and cooler with three or four spectral bands that view the same spot on the ground. The calibration accuracy of the S-HIS and results from recent field campaigns are presented, including validation comparisons with the NASA EOS infrared observations (AIRS and MODIS). Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. It is expected that aircraft flights of the S-HIS and the NAST will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the mission.

  • validation of atmospheric infrared sounder airs spectral radiances with the scanning high resolution interferometer sounder s his aircraft instrument
    Remote Sensing, 2004
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, Chris Moeller, Mark Werner
    Abstract:

    The ability to accurately validate high spectral resolution infrared radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on an under-flight of the Atmospheric Infrared Sounder (AIRS) on the NASA Aqua Spacecraft by the Scanning High resolution Interferometer Sounder (S-HIS) on the NASA ER-2 high altitude aircraft on 21 November 2002 and resulted in brightness temperature differences approaching 0.1K for most of the spectrum. This paper presents the details of this AIRS/S-HIS validation case and also presents comparisons of Aqua AIRS and Moderate Resolution Imaging Spectroradiometer (MODIS) radiance observations. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations. It is expected that aircraft flights of the S-HIS and its close cousin the National Polar Orbiting Environmental Satellite System (NPOESS) Atmospheric Sounder Testbed (NAST) will be used to check the long-term stability of the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the follow-on complement of operational Instruments, including the Cross-track Infrared Sounder (CrIS).

David C. Tobin - One of the best experts on this subject based on the ideXlab platform.

  • Validation of Atmospheric InfraRed Sounder (AIRS) Spectral Radiances with the Scanning High-resolution Interferometer Sounder (S-HIS) aircraft instrument
    2014
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, W. Werner, R. G. Dedecker
    Abstract:

    The ability to accurately validate high spectral resolution IR radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on a 21 November 2002 under-flight of the AIRS on the NASA Aqua Spacecraft by the S-HIS on the NASA ER-2 high altitude aircraft and resulted in brightness temperature differences approaching 0.1K for most of the spectrum! Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft

  • radiometric and spectral validation of atmospheric infrared sounder observations with the aircraft based scanning high resolution interferometer sounder
    Journal of Geophysical Research, 2006
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, R. G. Dedecker, Nick N Ciganovich, Steven Dutcher, Scott D. Ellington
    Abstract:

    [1] The ability to accurately validate high–spectral resolution infrared radiance measurements from space using comparisons with a high-altitude aircraft spectrometer has been successfully demonstrated. The demonstration is based on a 21 November 2002 underflight of the AIRS on the NASA Aqua Spacecraft by the Scanning-HIS on the NASA ER-2 high-altitude aircraft. A comparison technique which accounts for the different viewing geometries and spectral characteristics of the two sensors is introduced, and accurate comparisons are made for AIRS channels throughout the infrared spectrum. Resulting brightness temperature differences are found to be 0.2 K or less for most channels. Both the AIRS and the Scanning-HIS calibrations are expected to be very accurate (formal 3-sigma estimates are better than 1 K absolute brightness temperature for a wide range of scene temperatures), because high spectral resolution offers inherent advantages for absolute calibration and because they make use of high-emissivity cavity blackbodies as onboard radiometric references. AIRS also has the added advantage of a cold space view, and the Scanning-HIS calibration has recently benefited from the availability of a zenith view from high-altitude flights. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecraft (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft. It is expected that aircraft flights of the Scanning-HIS and its close cousin the NPOESS Airborne Sounder Test Bed (NAST) will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the missions.

  • Highly accurate FTIR observations from the Scanning HIS aircraft instrument
    Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, 2005
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Paul Van Delst, Daniel D. Laporte, Scott D. Ellington, Mark W. Werner, R. G. Dedecker
    Abstract:

    Development in the mid 80s of the High-resolution Interferometer Sounder (HIS) instrument for the high altitude NASA ER2 aircraft demonstrated the capability for advanced atmospheric temperature and water vapor sounding and set the stage for new satellite Instruments that are now becoming a reality [AIRS(2002), CrIS(2006), IASI(2006), GIFTS(200?), HES(2013)]. Follow-on developments at the University of Wisconsin that employ Fourier Transform Infrared (FTIR) for Earth observations include the ground-based Atmospheric Emitted Radiance Interferometer (AERI) and the new Scanning HIS aircraft instrument. The Scanning HIS is a smaller version of the original HIS that uses cross-track scanning to enhance spatial coverage. Scanning HIS and its close cousin, the NPOESS Airborne Sounder Testbed (NAST), are being used for satellite instrument validation and for atmospheric research. A novel detector configuration on Scanning HIS allows the incorporation of a single focal plane and cooler with three or four spectral bands that view the same spot on the ground. The calibration accuracy of the S-HIS and results from recent field campaigns are presented, including validation comparisons with the NASA EOS infrared observations (AIRS and MODIS). Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. It is expected that aircraft flights of the S-HIS and the NAST will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the mission.

  • validation of atmospheric infrared sounder airs spectral radiances with the scanning high resolution interferometer sounder s his aircraft instrument
    Remote Sensing, 2004
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, Chris Moeller, Mark Werner
    Abstract:

    The ability to accurately validate high spectral resolution infrared radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on an under-flight of the Atmospheric Infrared Sounder (AIRS) on the NASA Aqua Spacecraft by the Scanning High resolution Interferometer Sounder (S-HIS) on the NASA ER-2 high altitude aircraft on 21 November 2002 and resulted in brightness temperature differences approaching 0.1K for most of the spectrum. This paper presents the details of this AIRS/S-HIS validation case and also presents comparisons of Aqua AIRS and Moderate Resolution Imaging Spectroradiometer (MODIS) radiance observations. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations. It is expected that aircraft flights of the S-HIS and its close cousin the National Polar Orbiting Environmental Satellite System (NPOESS) Atmospheric Sounder Testbed (NAST) will be used to check the long-term stability of the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the follow-on complement of operational Instruments, including the Cross-track Infrared Sounder (CrIS).

Robert O. Knuteson - One of the best experts on this subject based on the ideXlab platform.

  • Validation of Atmospheric InfraRed Sounder (AIRS) Spectral Radiances with the Scanning High-resolution Interferometer Sounder (S-HIS) aircraft instrument
    2014
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, W. Werner, R. G. Dedecker
    Abstract:

    The ability to accurately validate high spectral resolution IR radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on a 21 November 2002 under-flight of the AIRS on the NASA Aqua Spacecraft by the S-HIS on the NASA ER-2 high altitude aircraft and resulted in brightness temperature differences approaching 0.1K for most of the spectrum! Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft

  • radiometric and spectral validation of atmospheric infrared sounder observations with the aircraft based scanning high resolution interferometer sounder
    Journal of Geophysical Research, 2006
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, R. G. Dedecker, Nick N Ciganovich, Steven Dutcher, Scott D. Ellington
    Abstract:

    [1] The ability to accurately validate high–spectral resolution infrared radiance measurements from space using comparisons with a high-altitude aircraft spectrometer has been successfully demonstrated. The demonstration is based on a 21 November 2002 underflight of the AIRS on the NASA Aqua Spacecraft by the Scanning-HIS on the NASA ER-2 high-altitude aircraft. A comparison technique which accounts for the different viewing geometries and spectral characteristics of the two sensors is introduced, and accurate comparisons are made for AIRS channels throughout the infrared spectrum. Resulting brightness temperature differences are found to be 0.2 K or less for most channels. Both the AIRS and the Scanning-HIS calibrations are expected to be very accurate (formal 3-sigma estimates are better than 1 K absolute brightness temperature for a wide range of scene temperatures), because high spectral resolution offers inherent advantages for absolute calibration and because they make use of high-emissivity cavity blackbodies as onboard radiometric references. AIRS also has the added advantage of a cold space view, and the Scanning-HIS calibration has recently benefited from the availability of a zenith view from high-altitude flights. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecraft (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft. It is expected that aircraft flights of the Scanning-HIS and its close cousin the NPOESS Airborne Sounder Test Bed (NAST) will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the missions.

  • Performance of an infrared sounder on several airborne platforms : the Scanning High Resolution Interferometer Sounder (S-HIS)
    Earth Observing Systems X, 2005
    Co-Authors: Joe K. Taylor, Robert O. Knuteson, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Nick N Ciganovich, Steven Dutcher, Raymond K. Garcia, H. B. Howell, Shaima L. Nasiri
    Abstract:

    A comparison of S-HIS instrument performance on various airborne platforms, and during ground characterization is presented. Specific emphasis is placed on instrument improvements, 1998 to present day, and the engineering lessons learned. Also discussed is the ability to accurately validate high spectral resolution IR radiance measurements from space using comparisons with aircraft spectrometer observations. Aircraft comparisons of this type provide a mechanism for periodically verifying expected absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for achieving the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua, Aura).

  • Highly accurate FTIR observations from the Scanning HIS aircraft instrument
    Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, 2005
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Paul Van Delst, Daniel D. Laporte, Scott D. Ellington, Mark W. Werner, R. G. Dedecker
    Abstract:

    Development in the mid 80s of the High-resolution Interferometer Sounder (HIS) instrument for the high altitude NASA ER2 aircraft demonstrated the capability for advanced atmospheric temperature and water vapor sounding and set the stage for new satellite Instruments that are now becoming a reality [AIRS(2002), CrIS(2006), IASI(2006), GIFTS(200?), HES(2013)]. Follow-on developments at the University of Wisconsin that employ Fourier Transform Infrared (FTIR) for Earth observations include the ground-based Atmospheric Emitted Radiance Interferometer (AERI) and the new Scanning HIS aircraft instrument. The Scanning HIS is a smaller version of the original HIS that uses cross-track scanning to enhance spatial coverage. Scanning HIS and its close cousin, the NPOESS Airborne Sounder Testbed (NAST), are being used for satellite instrument validation and for atmospheric research. A novel detector configuration on Scanning HIS allows the incorporation of a single focal plane and cooler with three or four spectral bands that view the same spot on the ground. The calibration accuracy of the S-HIS and results from recent field campaigns are presented, including validation comparisons with the NASA EOS infrared observations (AIRS and MODIS). Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. It is expected that aircraft flights of the S-HIS and the NAST will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the mission.

  • validation of atmospheric infrared sounder airs spectral radiances with the scanning high resolution interferometer sounder s his aircraft instrument
    Remote Sensing, 2004
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, Chris Moeller, Mark Werner
    Abstract:

    The ability to accurately validate high spectral resolution infrared radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on an under-flight of the Atmospheric Infrared Sounder (AIRS) on the NASA Aqua Spacecraft by the Scanning High resolution Interferometer Sounder (S-HIS) on the NASA ER-2 high altitude aircraft on 21 November 2002 and resulted in brightness temperature differences approaching 0.1K for most of the spectrum. This paper presents the details of this AIRS/S-HIS validation case and also presents comparisons of Aqua AIRS and Moderate Resolution Imaging Spectroradiometer (MODIS) radiance observations. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations. It is expected that aircraft flights of the S-HIS and its close cousin the National Polar Orbiting Environmental Satellite System (NPOESS) Atmospheric Sounder Testbed (NAST) will be used to check the long-term stability of the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the follow-on complement of operational Instruments, including the Cross-track Infrared Sounder (CrIS).

Fred A. Best - One of the best experts on this subject based on the ideXlab platform.

  • Validation of Atmospheric InfraRed Sounder (AIRS) Spectral Radiances with the Scanning High-resolution Interferometer Sounder (S-HIS) aircraft instrument
    2014
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, W. Werner, R. G. Dedecker
    Abstract:

    The ability to accurately validate high spectral resolution IR radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on a 21 November 2002 under-flight of the AIRS on the NASA Aqua Spacecraft by the S-HIS on the NASA ER-2 high altitude aircraft and resulted in brightness temperature differences approaching 0.1K for most of the spectrum! Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft

  • radiometric and spectral validation of atmospheric infrared sounder observations with the aircraft based scanning high resolution interferometer sounder
    Journal of Geophysical Research, 2006
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, R. G. Dedecker, Nick N Ciganovich, Steven Dutcher, Scott D. Ellington
    Abstract:

    [1] The ability to accurately validate high–spectral resolution infrared radiance measurements from space using comparisons with a high-altitude aircraft spectrometer has been successfully demonstrated. The demonstration is based on a 21 November 2002 underflight of the AIRS on the NASA Aqua Spacecraft by the Scanning-HIS on the NASA ER-2 high-altitude aircraft. A comparison technique which accounts for the different viewing geometries and spectral characteristics of the two sensors is introduced, and accurate comparisons are made for AIRS channels throughout the infrared spectrum. Resulting brightness temperature differences are found to be 0.2 K or less for most channels. Both the AIRS and the Scanning-HIS calibrations are expected to be very accurate (formal 3-sigma estimates are better than 1 K absolute brightness temperature for a wide range of scene temperatures), because high spectral resolution offers inherent advantages for absolute calibration and because they make use of high-emissivity cavity blackbodies as onboard radiometric references. AIRS also has the added advantage of a cold space view, and the Scanning-HIS calibration has recently benefited from the availability of a zenith view from high-altitude flights. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecraft (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. The validation role for accurately calibrated aircraft spectrometers also includes application to broadband Instruments and linking the calibrations of similar Instruments on different Spacecraft. It is expected that aircraft flights of the Scanning-HIS and its close cousin the NPOESS Airborne Sounder Test Bed (NAST) will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the missions.

  • Performance of an infrared sounder on several airborne platforms : the Scanning High Resolution Interferometer Sounder (S-HIS)
    Earth Observing Systems X, 2005
    Co-Authors: Joe K. Taylor, Robert O. Knuteson, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Nick N Ciganovich, Steven Dutcher, Raymond K. Garcia, H. B. Howell, Shaima L. Nasiri
    Abstract:

    A comparison of S-HIS instrument performance on various airborne platforms, and during ground characterization is presented. Specific emphasis is placed on instrument improvements, 1998 to present day, and the engineering lessons learned. Also discussed is the ability to accurately validate high spectral resolution IR radiance measurements from space using comparisons with aircraft spectrometer observations. Aircraft comparisons of this type provide a mechanism for periodically verifying expected absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for achieving the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua, Aura).

  • Highly accurate FTIR observations from the Scanning HIS aircraft instrument
    Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, 2005
    Co-Authors: Henry E. Revercomb, William L Smith, Robert O. Knuteson, David C. Tobin, Fred A. Best, Paul Van Delst, Daniel D. Laporte, Scott D. Ellington, Mark W. Werner, R. G. Dedecker
    Abstract:

    Development in the mid 80s of the High-resolution Interferometer Sounder (HIS) instrument for the high altitude NASA ER2 aircraft demonstrated the capability for advanced atmospheric temperature and water vapor sounding and set the stage for new satellite Instruments that are now becoming a reality [AIRS(2002), CrIS(2006), IASI(2006), GIFTS(200?), HES(2013)]. Follow-on developments at the University of Wisconsin that employ Fourier Transform Infrared (FTIR) for Earth observations include the ground-based Atmospheric Emitted Radiance Interferometer (AERI) and the new Scanning HIS aircraft instrument. The Scanning HIS is a smaller version of the original HIS that uses cross-track scanning to enhance spatial coverage. Scanning HIS and its close cousin, the NPOESS Airborne Sounder Testbed (NAST), are being used for satellite instrument validation and for atmospheric research. A novel detector configuration on Scanning HIS allows the incorporation of a single focal plane and cooler with three or four spectral bands that view the same spot on the ground. The calibration accuracy of the S-HIS and results from recent field campaigns are presented, including validation comparisons with the NASA EOS infrared observations (AIRS and MODIS). Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations, including those from the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the new complement of NPOESS operational Instruments. It is expected that aircraft flights of the S-HIS and the NAST will be used to check the long-term stability of AIRS and the NPOESS operational follow-on sounder, the Cross-track Infrared Sounder (CrIS), over the life of the mission.

  • validation of atmospheric infrared sounder airs spectral radiances with the scanning high resolution interferometer sounder s his aircraft instrument
    Remote Sensing, 2004
    Co-Authors: David C. Tobin, William L Smith, Robert O. Knuteson, Henry E. Revercomb, Fred A. Best, Daniel D. Laporte, Scott D. Ellington, Paul Van Delst, Chris Moeller, Mark Werner
    Abstract:

    The ability to accurately validate high spectral resolution infrared radiance measurements from space using comparisons with aircraft spectrometer observations has been successfully demonstrated. The demonstration is based on an under-flight of the Atmospheric Infrared Sounder (AIRS) on the NASA Aqua Spacecraft by the Scanning High resolution Interferometer Sounder (S-HIS) on the NASA ER-2 high altitude aircraft on 21 November 2002 and resulted in brightness temperature differences approaching 0.1K for most of the spectrum. This paper presents the details of this AIRS/S-HIS validation case and also presents comparisons of Aqua AIRS and Moderate Resolution Imaging Spectroradiometer (MODIS) radiance observations. Aircraft comparisons of this type provide a mechanism for periodically testing the absolute calibration of Spacecraft Instruments with instrumentation for which the calibration can be carefully maintained on the ground. This capability is especially valuable for assuring the long-term consistency and accuracy of climate observations. It is expected that aircraft flights of the S-HIS and its close cousin the National Polar Orbiting Environmental Satellite System (NPOESS) Atmospheric Sounder Testbed (NAST) will be used to check the long-term stability of the NASA EOS Spacecrafts (Terra, Aqua and Aura) and the follow-on complement of operational Instruments, including the Cross-track Infrared Sounder (CrIS).