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  • 1
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    Very Black Infrared Detector from Vertically Aligned Carbon Nanotubes and Electric-Field Poling of Lithium Tantalate (2010)
    American Chemical Society
    Details
    Publication Date: 2010-09-08
    Print ISSN: 1530-6984
    Electronic ISSN: 1530-6992
    Topics: Chemistry and Pharmacology , Physics
    Published by American Chemical Society
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    PAPER CURRENT
  • 2
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    BRDF measurements of graphite used in high-temperature fixed point blackbody radiators: a multi-angle study at 405 nm and 658 nm (2012)
    Institute of Physics
    Details
    Publication Date: 2012-03-02
    Print ISSN: 0026-1394
    Electronic ISSN: 1681-7575
    Topics: Electrical Engineering, Measurement and Control Technology
    Published by Institute of Physics
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    PAPER CURRENT
  • 3
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    An absolute cavity pyrgeometer to measure the absolute outdoor longwave irradiance with traceability to international system of units, SI (2012)
    Elsevier
    Details
    Publication Date: 2012-03-01
    Print ISSN: 1364-6826
    Electronic ISSN: 1879-1824
    Topics: Geosciences , Physics
    Published by Elsevier
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    PAPER CURRENT
  • 4
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    Characterization of LANDSAT Panels Using the NIST BRDF Scale from 1100 nm to 2500 nm (2010)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: Many earth observing sensors depend on white diffuse reflectance standards to derive scales of radiance traceable to the St Despite the large number of Earth observing sensors that operate in the reflective solar region of the spectrum, there has been no direct method to provide NIST traceable BRDF measurements out to 2500 rim. Recent developments in detector technology have allowed the NIST reflectance measurement facility to expand the operating range to cover the 250 nm to 2500 nm range. The facility has been modified with and additional detector using a cooled extended range indium gallium arsenide (Extended InGaAs) detector. Measurements were made for two PTFE white diffuse reflectance standards over the 1100 nm to 2500 nm region at a 0' incident and 45' observation angle. These two panels will be used to support the OLI calibration activities. An independent means of verification was established using a NIST radiance transfer facility based on spectral irradiance, radiance standards and a diffuse reflectance plaque. An analysis on the results and associated uncertainties will be discussed.
    Keywords: Spacecraft Design, Testing and Performance
    Type: CALCON Technical Conference on Characterization and Radiometric Calibration for Rernote Sensing; Aug 23, 2010 - Aug 26, 2010; Logan, UT; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    JPSS-1 VIIRS Solar Diffuser Witness Sample BRF Calibration Using a Table-Top Goniometer at NASA GSFC (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: In support of the prelaunch calibration of the Joint Polar Satellite System-1 (JPSS-1) Visible Infrared Imaging Radiometer Suite (VIIRS), the Bidirectional Reflectance Factor (BRF) and Bidirectional Reflectance Distribution Function (BRDF) of a VIIRS solar diffuser (SD) witness sample were determined using the table-top goniometer (TTG) located in the NASA GSFC Diffuser Calibration Laboratory (DCL). The BRF of the sample was measured for VIIRS bands in the reflected solar wavelength region from 410 nm to 2250 nm. The new TTG was developed to extend the laboratorys BRF and BRDF measurement capability to wavelengths from 1600 to 2250 nm and specifically for the VIIRS M11 band centered at 2250 nm. We show the new features and capabilities of the new scatterometer and present the BRF and BRDF results for the incident/scatter test configuration of 0/45 and for a set of angles representing of the VIIRS on-orbit solar diffuser calibration. The BRF and BRDF results of the SD witness were used to assist in finalizing the set of BRF values of J1 VIIRS SD to be used on-orbit. Comparison of the BRF results between the JPSS-1 VIIRS SD witness sample and the flight SD panel was made by varying different sample clocking orientations and by analyzing the ratio of BRF to total hemispherical reflectance in effort to minimize the uncertainty of the extrapolated flight BRF value at 2250 nm. Furthermore, differences between the prelaunch BRF results and those used in the VIIRS on-orbit BRF lookup table were examined to improve the VIIRS BRF calibration for future missions.
    Keywords: Instrumentation and Photography
    Type: GSFC-E-DAA-TN67064-2 , SPIE Optical Engineering + Applications; Aug 19, 2018 - Aug 23, 2018; San Diego, CA; United States
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    NASA TECHNICAL REPORTS
  • 6
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    JPSS-1 VIIRS Solar Diffuser Witness Sample BRF Calibration Using a Table-Top Goniometer at NASA GSFC (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: In support of the prelaunch calibration of the Joint Polar Satellite System-1 (JPSS-1) Visible Infrared Imaging Radiometer Suite (VIIRS), the Bidirectional Reflectance Factor (BRF) and Bidirectional Reflectance Distribution Function (BRDF) of a VIIRS solar diffuser (SD) witness sample were determined using the table-top goniometer (TTG) located in the NASA GSFC Diffuser Calibration Laboratory (DCL). The BRF of the sample was measured for VIIRS bands in the reflected solar wavelength region from 410 nm to 2250 nm. The new TTG was developed to extend the laboratorys BRF and BRDF measurement capability to wavelengths from 1600 to 2250 nm and specifically for the VIIRS M11 band centered at 2250 nm. We show the new features and capabilities of the new scatterometer and present the BRF and BRDF results for the incident/scatter test configuration of 0/45 and for a set of angles representing of the VIIRS on-orbit solar diffuser calibration. The BRF and BRDF results of the SD witness were used to assist in finalizing the set of BRF values of J1 VIIRS SD to be used on-orbit. Comparison of the BRF results between the JPSS-1 VIIRS SD witness sample and the flight SD panel was made by varying different sample clocking orientations and by analyzing the ratio of BRF to total hemispherical reflectance in effort to minimize the uncertainty of the extrapolated flight BRF value at 2250 nm. Furthermore, differences between the prelaunch BRF results and those used in the VIIRS on-orbit BRF lookup table were examined to improve the VIIRS BRF calibration for future missions.
    Keywords: Instrumentation and Photography
    Type: GSFC-E-DAA-TN67064-1 , SPIE Optical Engineering + Applications; Aug 19, 2018 - Aug 23, 2018; San Diego, CA; United States|Earth Observing Systems XXIII; 10764; 1076404
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    NASA TECHNICAL REPORTS
  • 7
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    Characterizations of a KHz Pulsed Laser Detection System (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: A KHz Pulsed Laser Detection System was developed employing the concept of charge integration with an electrometer, in the NASA Goddard Space Flight Center, Code 618 Calibration Lab for the purpose of using the pulsed lasers for radiometric calibration. Comparing with traditional trans-impedance (current-voltage conversion) detection systems, the prototype of this system consists of a UV-Enhanced Si detector head, a computer controlled shutter system and a synchronized electrometer. The preliminary characterization work employs light sources running in either CW or pulsed mode. We believe this system is able to overcome the saturation issue when a traditional trans-impedance detection system is used with the pulsed laser light source, especially with high peak-power pulsed lasers operating at kilohertz repetition rates (e.g. Ekspla laser or KHz OPO). The charge integration mechanism is also expected to improve the stability of measurements for a pulsed laser light source overcoming the issue of peak-to-peak stability. We will present the system characterizations including signal-to-noise ratio and uncertainty analysis and compare results against traditional trans-impedance detection systems.
    Keywords: Lasers and Masers
    Type: GSFC-E-DAA-TN66045-2 , SPIE Optics Engineering + Applications; Aug 19, 2018 - Aug 23, 2018; San Diego, CA; United States|Earth Observing Systems XXIII; 10764; 1076407
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    NASA TECHNICAL REPORTS
  • 8
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    Characterizations of a KHz Pulsed Laser Detection System (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: A KHz Pulsed Laser Detection System was developed employing the concept of charge integration with an electrometer, in the NASA Goddard Space Flight Center, Code 618 Calibration Lab for the purpose of using the pulsed lasers for radiometric calibration. Comparing with traditional trans-impedance (current-voltage conversion) detection systems, the prototype of this system consists of a UV-Enhanced Si detector head, a computer controlled shutter system and a synchronized electrometer. The preliminary characterization work employs light sources running in either CW or pulsed mode. We believe this system is able to overcome the saturation issue when a traditional trans-impedance detection system is used with the pulsed laser light source, especially with high peak-power pulsed lasers operating at kilohertz repetition rates (e.g. Ekspla laser or KHz OPO). The charge integration mechanism is also expected to improve the stability of measurements for a pulsed laser light source overcoming the issue of peak-to-peak stability. We will present the system characterizations including signal-to-noise ratio and uncertainty analysis and compare results against traditional trans-impedance detection systems.
    Keywords: Lasers and Masers
    Type: GSFC-E-DAA-TN66045-1 , Earth Observing Systems XXIII; 10764; 1076407|SPIE Optical Engineering + Applications; Aug 19, 2018 - Aug 23, 2018; San Diego, CA; United States
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    NASA TECHNICAL REPORTS
  • 9
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    JPSS-1 VIIRS Version 2 At-Launch Relative Spectral Response Characterization and Performance (2017)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The relative spectral response (RSR) characterization of the JPSS-1 VIIRS spectral bands has achieved at launch status in the VIIRS Data Analysis Working Group February 2016 Version 2 RSR release. The Version 2 release improves upon the June 2015 Version 1 release by including December 2014 NIST TSIRCUS spectral measurements of VIIRS VisNIR bands in the analysis plus correcting CO2 influence on the band M13 RSR. The T-SIRCUS based characterization is merged with the summer 2014 SpMA based characterization of VisNIR bands (Version 1 release) to yield a fused RSR for these bands, combining the strengths of the T-SIRCUS and the SpMA measurement systems. The M13 RSR is updated by applying a model-based correction to mitigate CO2 attenuation of the SpMA source signal that occurred during M13 spectral measurements. The Version 2 release carries forward the Version 1 RSR for those bands that were not updated (M8-M12, M14-M16AB, I3-I5, DNBMGS). The Version 2 release includes band average (overall detectors and subsamples) RSR plus supporting RSR for each detector and subsample. The at-launch band average RSR have been used to populate Look-Up Tables supporting the sensor data record and environmental data record at-launch science products. Spectral performance metrics show that JPSS-1VIIRS RSR are compliant on specifications with a few minor exceptions. The Version 2 release, which replaces the Version 1 release, is currently available on the password-protected NASA JPSS-1 eRooms under EAR99 control.
    Keywords: Earth Resources and Remote Sensing
    Type: GSFC-E-DAA-TN44311 , Earth Observing Systems XXI Conference; Aug 28, 2016; San Diego, CA; United States|SPIE Proceedings (ISSN 0277-786X) (e-ISSN 1996-756X); 9972; 997203
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    NASA TECHNICAL REPORTS
  • 10
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    JPSS-1 VIIRS Pre-Launch Radiometric Performance (2015)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The first Joint Polar Satellite System (JPSS-1 or J1) mission is scheduled to launch in January 2017, and will be very similar to the Suomi-National Polar-orbiting Partnership (SNPP) mission. The Visible Infrared Imaging Radiometer Suite (VIIRS) on board the J1 spacecraft completed its sensor level performance testing in December 2014. VIIRS instrument is expected to provide valuable information about the Earth environment and properties on a daily basis, using a wide-swath (3,040 km) cross-track scanning radiometer. The design covers the wavelength spectrum from reflective to long-wave infrared through 22 spectral bands, from 0.412 m to 12.01 m, and has spatial resolutions of 370 m and 740 m at nadir for imaging and moderate bands, respectively. This paper will provide an overview of pre-launch J1 VIIRS performance testing and methodologies, describing the at-launch baseline radiometric performance as well as the metrics needed to calibrate the instrument once on orbit. Key sensor performance metrics include the sensor signal to noise ratios (SNRs), dynamic range, reflective and emissive bands calibration performance, polarization sensitivity, bands spectral performance, response-vs-scan (RVS), near field response, and stray light rejection. A set of performance metrics generated during the pre-launch testing program will be compared to the sensor requirements and to SNPP VIIRS pre-launch performance.
    Keywords: Meteorology and Climatology; Earth Resources and Remote Sensing
    Type: GSFC-E-DAA-TN42652 , Proc. SPIE Earth Observing Systems XX; 9607; 960710|Earth Observing Systems XX; Aug 09, 2015; San Diego, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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