温度・放射率分離手法における大気補正誤差の影響評価とその低減手法
書誌事項
- タイトル別名
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- Influences of Atmospheric Correction Error and Its Reduction Method in Temperature and Emissivity Separation.
抄録
In the temperature and emissivity (T/E) separation methods for ASTER thermal infrared multispectral data, influences of the atmospheric correction error as well as those of the empirical assumption error have tc be considered because no atmospheric profile will be observed simultaneously in the current plan. Thus, the sensitivity of T/E separation methods to the atmospheric correction error and the empirical assumption error is showed to be a function of atmospheric parameters, land surface parameters and wavelength and evaluated by LOWTRAN 7.<BR>Considering the dependence of this sensitivity upon wavelength, a new suggestion to the application of T/E separation methods is introduced, which can reduce the influences of atmospheric correction error by the stepwise processings. The first step is to eliminate some channels relatively sensitive to the atmospheric correction error, then the second step is to calculate the temperature and the spectral emissivity of remained channels. This step is based on the empirical assumption on the emissivity of these channels. The final step is to derive the spectral emissivity of the eliminated channels using the previously obtained temperature.<BR>In the final part of this study, the effectiveness of this approach is evaluated in the typical T/E separation method called the normalization method. The laboratory spectra of various materials are used as model data. This evaluation demonstrates the advantage of this approach, while the necessity of validity check of empirical assumption is also indicated.
収録刊行物
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- 日本リモートセンシング学会誌
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日本リモートセンシング学会誌 13 (3), 229-239, 1993
一般社団法人 日本リモートセンシング学会
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詳細情報 詳細情報について
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- CRID
- 1390001204667058432
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- NII論文ID
- 130003638351
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- ISSN
- 18831184
- 02897911
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可