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NASA IKONOS Multispectral Radiometric Calibration and 3-Year Temporal Stability AssessmentRadiometric calibration of commercial imaging satellite products is required to ensure that science and application communities can place confidence in the imagery they use and can fully understand its properties. Inaccurate radiometric calibrations can lead to erroneous decisions and invalid conclusions and can limit intercomparisons with other system. In addition, the user community has little or no insight into the design and operation of commercial sensors or into the methods involved in generating commercial products. To address this calibration need, the NASA Stennis Space Center (SSC) Earth Science Applications (ESA) Directorate established a commercial satellite imaging radiometric calibration team consisting of three independent groups: NASA, SSC,ESA, the University of Arizona Remote Sensing Group, and South Dacota State University. Each group determined the absolute radiometric calibration coefficients of the Space Imaging IKONOS 4-band, 4 m multispectral product covering the visible through near-infrared spectral region. For a three year period beginning in 2000, each team employed some variant of a reflectance-based vicarious calibration approach, requiring ground-based measurements coincident with IKONOS image acquisitions and radiative transfer calculations. Several study sites throughout the United States were employed that covered nearly the entire dynamic range of the IKONOS sensor. IKONOS at-sensor radiance values were compared to those estimated by each independent group to determine the IKONOS sensor's radiometric accuracy and stability. Over 10 individual vicariously determined at-sensor radiance estimates were used each year. When combined, these estimates provided a high-precision radiometric gain calibration coefficient. No significant calibration offset was observed. The results of this evaluation provide the scientific community with an independent assessment of the IKONOS sensor's absolute calibration and temporal stability over the 3-year period. While the techniques and method described in this paper reflect those developed at the NASA SSC, the results of the entire team are included.
Document ID
20040000525
Acquisition Source
Stennis Space Center
Document Type
Conference Paper
Authors
Pagnutti, Mary
(Lockheed Martin Space Operations Bay Saint Louis, MS, United States)
Carver, David
(Lockheed Martin Space Operations Bay Saint Louis, MS, United States)
Holekamp, Kara
(Lockheed Martin Space Operations Bay Saint Louis, MS, United States)
Ryan, Robert
(Lockheed Martin Space Operations Bay Saint Louis, MS, United States)
Zanoni, Vicki
(NASA Stennis Space Center Stennis Space Center, MS, United States)
Thome, Kurtis
(Alberta Univ. Alberta, Canada)
Schiller, Stephen
(San Diego State Univ. San Diego, CA, United States)
Aaran, David
(San Diego State Univ. San Diego, CA, United States)
Date Acquired
August 21, 2013
Publication Date
September 12, 2003
Subject Category
Instrumentation And Photography
Report/Patent Number
SE-2003-09-00085-SSC
Meeting Information
Meeting: ISPRS Commission I/Working Group 2 International Workshop on Radiometric and Geometric Calibration
Location: Gulfport, MS
Country: United States
Start Date: December 2, 2003
End Date: December 5, 2003
Sponsors: International Society for Photogrammetry
Funding Number(s)
CONTRACT_GRANT: NAS13-650
Distribution Limits
Public
Copyright
Other

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