Skip to main content
U.S. flag

An official website of the United States government

Landsat-7 Enhanced Thematic Mapper plus radiometric calibration

January 1, 1997

Landsat-7 is currently being built and tested for launch in 1998. The Enhanced Thematic Mapper Plus (ETM+) sensor for Landsat-7, a derivative of the highly successful Thematic Mapper (TM) sensors on Landsats 4 and 5, and the Landsat-7 ground system are being built to provide enhanced radiometric calibration performance. In addition, regular vicarious calibration campaigns are being planned to provide additional information for calibration of the ETM+ instrument. The primary upgrades to the instrument include the addition of two solar calibrators: the full aperture solar calibrator, a deployable diffuser, and the partial aperture solar calibrator, a passive device that allows the ETM+ to image the sun. The ground processing incorporates for the first time an off-line facility, the Image Assessment System (IAS), to perform calibration, evaluation and analysis. Within the IAS, processing capabilities include radiometric artifact characterization and correction, radiometric calibration from the multiple calibrator sources, inclusion of results from vicarious calibration and statistical trending of calibration data to improve calibration estimation. The Landsat Product Generation System, the portion of the ground system responsible for producing calibrated products, will incorporate the radiometric artifact correction algorithms and will use the calibration information generated by the IAS. This calibration information will also be supplied to ground processing systems throughout the world.

Publication Year 1997
Title Landsat-7 Enhanced Thematic Mapper plus radiometric calibration
DOI 10.1080/07038992.1997.10855218
Authors B. L. Markham, Wayne C. Boncyk, D. L. Helder, J. L. Barker
Publication Type Article
Publication Subtype Journal Article
Series Title Canadian Journal of Remote Sensing
Index ID 70187677
Record Source USGS Publications Warehouse
USGS Organization Earth Resources Observation and Science (EROS) Center