| タイトル | Landsat 4 Thematic Mapper Calibration Update |
| 本文（外部サイト） | http://hdl.handle.net/2060/20110015528 |
| 著者（英） | Micijevic, Esad; Markham, Brian; Mettler, Cory; Helder, Dennis; Malla. Rimy |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 2011-01-01 |
| 言語 | eng |
| 内容記述 | The Landsat-4 Thematic Mapper collected imagery of the Earth's surface from 1982 to 1993. Although largely overshadowed by Landsat 5, which was launched in 1984, Landsat 4 TM imagery extends the Thematic Mapper-based record of the Earth back to 1982 and also substantially supplements the image archive collected by Landsat 5. To provide a consistent calibration record for the TM instruments, Landsat 4 TM was cross-calibrated to Landsat 5 using nearly simultaneous overpass imagery of pseudo-invariant calibration sites (PICS) in the time period of 1988 through 1990. To determine if the radiometric gain of Landsat 4 had changed over its lifetime, time series from two PICS locations, a Saharan site known as Libya 4 and a site in southwest North America, commonly referred to as the Sonoran Desert PICS, were developed. Results indicated that Landsat 4 had been very stable over its lifetime with no discernible degradation in sensor performance in all the reflective bands except band 1. In contrast, band 1 exhibited a 12% decay in responsivity over the lifetime of the instrument. Results from this work have been implemented at USGS EROS, which enables users of Landsat TM data sets to obtain consistently calibrated data from Landsat 4 and 5 TM as well as Landsat 7 ETM+ instruments. |
| NASA分類 | Earth Resources and Remote Sensing |
| レポートNO | GSFC.JA.4947.2011 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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