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

IEEE Transactions on Geoscience and Remote Sensing
By: , and 

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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.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Four years of Landsat-7 on-orbit geometric calibration and performance
Series title IEEE Transactions on Geoscience and Remote Sensing
DOI 10.1109/TGRS.2004.836769
Volume 42
Issue 12
Year Published 2004
Language English
Publisher IEEE
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 10 p.
First page 2786
Last page 2795