Landsat TM and ETM+ thermal band calibration
Landsat TM and ETM+ thermal band calibration
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DOI：
10.1117/12.683212
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发表时间：
2003-01
影响因子：
2.6
通讯作者：
J. Barsi;J. Schott;F. Palluconi;D. Helder;S. Hook;B. Markham;G. Chander;E. O'Donnell
中科院分区：
文献类型：
--
作者：
J. Barsi;J. Schott;F. Palluconi;D. Helder;S. Hook;B. Markham;G. Chander;E. O'Donnell
Landsat-5 自 1984 年 3 月以来一直对地球进行成像，Landsat-7 于 1999 年 4 月被添加到 Landsat 仪器系列中。Landsat 项目科学办公室和 Landsat-7 图像评估系统自发射以来一直在监测 Landsat-7 的机载校准。此外，自 Landsat-7 发射以来，两个独立的大学团队一直在通过地面测量来评估其机载热校准。尽管在其整个生命周期中没有对其进行密切监测，但目前正在做出新的努力来验证 Landsat-5 的校准。两个大学团队开始收集 Landsat-5 下的地面实况，并使用其他替代校准方法返回档案以验证 Landsat-5 校准的历史。本文考虑了 Landsat-5 和 Landsat-7 仪器的热波段（波段 6）的校准工作。尽管自发射以来一直保持稳定，但 Landsat-7 的初始校准误差约为 3 K，并且从 2000 年 10 月 1 日起对使用国家陆地卫星档案生产系统 (NLAPS) 处理的数据以及从 2000 年 12 月 20 日开始对使用陆地卫星产品生成系统 (LPGS) 处理的数据进行了更改以纠正此误差。 Landsat-5 替代校准工作的最新结果显示，在仪器的使用寿命内存在 ‐0.7 K 的偏移。这表明历史校准工作可能一直在检测处理系统中的错误，而不是仪器中的变化。对 Landsat-5 处理的修正尚未实施，但将在不久的将来实施。
Landsat-5 has been imaging the Earth since March 1984, and Landsat-7 was added to the series of Landsat instruments in April 1999. The Landsat Project Science Office and the Landsat-7 Image Assessment System have been monitoring the on-board calibration of Landsat-7 since launch. Additionally, two separate university teams have been evaluating the on-board thermal calibration of Landsat-7 through ground-based measurements since launch. Although not monitored as closely over its lifetime, a new effort is currently being made to validate the calibration of Landsat-5. Two university teams are beginning to collect ground truth under Landsat-5, along with using other vicarious calibration methods to go back into the archive to validate the history of the calibration of Landsat-5. This paper considers the calibration efforts for the thermal band, band 6, of both the Landsat-5 and Landsat-7 instruments. Though stable since launch, Landsat-7 had an initial calibration error of about 3 K, and changes were made to correct for this beginning 1 October 2000 for data processed with the National Landsat Archive Production System (NLAPS) and beginning 20 December 2000 for data processed with the Landsat Product Generation System (LPGS). Recent results from Landsat-5 vicarious calibration efforts show an offset of ‐0.7 K over the lifetime of the instrument. This suggests that historical calibration efforts may have been detecting errors in processing systems rather than changes in the instrument. A correction to the Landsat-5 processing has not yet been implemented but will be in the near future.