Four years of Landsat-7 on-orbit geometric calibration and performance

Lee, D. S.; Storey, J. C.; Choate, M. J.; Hayes, R. W.

Abstract:

Unlike its predecessors, Landsat-7 has undergone regular geometric and radiometric performance monitoring and calibration since launch in April 1999. This ongoing activity, which includes issuing quarterly updates to calibration parameters, has generated a wealth of geometric performance data over the four-year on-orbit period of operations. A suite of geometric characterization (measurement and evaluation procedures) and calibration (procedures to derive improved estimates of instrument parameters) methods are employed by the Landsat-7 Image Assessment System to maintain the geometric calibration and to track specific aspects of geometric performance. These include geodetic accuracy, band-to-band registration accuracy, and image-to-image registration accuracy. These characterization and calibration activities maintain image product geometric accuracy at a high level - by monitoring performance to determine when calibration is necessary, generating new calibration parameters, and verifying that new parameters achieve desired improvements in accuracy. Landsat-7 continues to meet and exceed all geometric accuracy requirements, although aging components have begun to affect performance.

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Article

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70026272

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Lee, D. S.; Storey, J. C.; Choate, M. J.; Hayes, R. W.

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2795

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English

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IEEE Transactions on Geoscience and Remote Sensing

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Four years of Landsat-7 on-orbit geometric calibration and performance; 2004; Article; Journal; IEEE Transactions on Geoscience and Remote Sensing; Lee, D. S.; Storey, J. C.; Choate, M. J.; Hayes, R. W.