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TitleRadiometric cross-calibration of the Landsat-7 ETM+ and Landsat-5 TM aensors based on tandem data sets
DownloadDownloads (Preprint)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorTeillet, P M; Barker, J; Markham, B L; Irish, R R; Fedosejevs, G; Storey, J C
SourceRemote Sensing of Environment vol. 78, issue 1-2, 2001 p. 39-54, Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20042918
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf
Subjectsremote sensing; LANDSAT imagery; ETM+
Illustrationslocation maps; satellite images; tables; graphs
AbstractEarly in its mission, the Landsat-7 spacecraft was temporarily placed in a tandemorbit very close to that of the Landsat-5 spacecraft in order to facilitate the establishment of sensor calibration continuity between Landsat-5 Thematic Mapper (TM) and the Landsat-7 Enhanced Thematic Mapper Plus (ETM) sensors. The key period for the tandem configuration was June 1-4, 1999, during which hundreds of nearly-coincident matching scenes were recorded by both the Landsat-7 ETM+ and, in cooperation with Space Imaging / EOSAT and international ground stations, the Landsat-5 TM as well. The paper presents a methodology for radiometric cross-calibration of the solar reflective spectral bands of the Landsat-7 ETM+ and Landsat-5 TM sensors and results based on analysis of two different tandem image pairs for which ground reference data are available. With the well-calibrated ETM+ as a reference, the tandem-based cross-calibrations for the two image pairs yield TM responsivities that are consistent to each other to within a few percent or better depending on the spectral band. Comparisons with independent methods and results obtained by other groups indicate that the tandem-based cross-calibration is in close agreement with the independent results in spectral bands 1-4 but compares less favourably in the other bands. Thus, the present study indicates that the tandem cross-calibration approach can provide a valuable contemporarycalibration update for Landsat-5 TM in the visible and near-infrared spectral bands based on the excellent radiometric performance of Landsat-7 ETM+. The methodology also incorporates adjustments for spectral band differences between the two Landsat sensors. Spectral band difference effects are shown to be more dependent on the surface reflectance spectrum than on atmospheric and illumination conditions. A variety of target types are assessed regarding their suitability for Landsat radiometric cross-calibration in the absence of surface reflectance spectra.

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