Landsat-7 ETM+ radiometric calibration status

Julia A. Barsi, Brian L. Markham, Jeffrey S. Czapla-Myers, Dennis L. Helder, Simon J. Hook, John R. Schott, Md Obaidul Haque

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Scopus citations


Now in its 17th year of operation, the Enhanced Thematic Mapper + (ETM+), on board the Landsat-7 satellite, continues to systematically acquire imagery of the Earth to add to the 40+ year archive of Landsat data. Characterization of the ETM+ on-orbit radiometric performance has been on-going since its launch in 1999. The radiometric calibration of the reflective bands is still monitored using on-board calibration devices, though the Pseudo-Invariant Calibration Sites (PICS) method has proven to be an effective tool as well. The calibration gains were updated in April 2013 based primarily on PICS results, which corrected for a change of as much as -0.2%/year degradation in the worst case bands. A new comparison with the SADE database of PICS results indicates no additional degradation in the updated calibration. PICS data are still being tracked though the recent trends are not well understood. The thermal band calibration was updated last in October 2013 based on a continued calibration effort by NASA/Jet Propulsion Lab and Rochester Institute of Technology. The update accounted for a 0.036 W/m2 sr μm or 0.26K at 300K bias error. The updated lifetime trend is now stable to within +/- 0.4K.

Original languageEnglish (US)
Title of host publicationEarth Observing Systems XXI
EditorsJames J. Butler, Xingfa Gu, Xiaoxiong Xiong
ISBN (Electronic)9781510603356
StatePublished - 2016
EventEarth Observing Systems XXI - San Diego, United States
Duration: Aug 30 2016Sep 1 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherEarth Observing Systems XXI
Country/TerritoryUnited States
CitySan Diego


  • ETM+
  • Landsat
  • calibration
  • radiometry
  • reflective
  • thermal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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