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Cross calibration of the Landsat-7 ETM+ and EO-1 ALI sensor

January 1, 2004

As part of the Earth Observer 1 (EO-1) Mission, the Advanced Land Imager (ALI) demonstrates a potential technological direction for Landsat Data Continuity Missions. To evaluate ALI's capabilities in this role, a cross-calibration methodology has been developed using image pairs from the Landsat-7 (L7) Enhanced Thematic Mapper Plus (ETM+) and EO-1 (ALI) to verify the radiometric calibration of ALI with respect to the well-calibrated L7 ETM+ sensor. Results have been obtained using two different approaches. The first approach involves calibration of nearly simultaneous surface observations based on image statistics from areas observed simultaneously by the two sensors. The second approach uses vicarious calibration techniques to compare the predicted top-of-atmosphere radiance derived from ground reference data collected during the overpass to the measured radiance obtained from the sensor. The results indicate that the relative sensor chip assemblies gains agree with the ETM+ visible and near-infrared bands to within 2% and the shortwave infrared bands to within 4%.

Publication Year 2004
Title Cross calibration of the Landsat-7 ETM+ and EO-1 ALI sensor
DOI 10.1109/TGRS.2004.836387
Authors G. Chander, D. J. Meyer, D. L. Helder
Publication Type Article
Publication Subtype Journal Article
Series Title IEEE Transactions on Geoscience and Remote Sensing
Index ID 70026378
Record Source USGS Publications Warehouse
USGS Organization Earth Resources Observation and Science (EROS) Center