A Case Study of Measurement Uncertainty in Field Spectroscopy
In this article, a novel approach to measuring in situ field uncertainties in surface reflectance is presented. This work is an outcome of a national campaign by Geoscience Australia to validate our analysis-ready Landsat 8 and Sentinel 2 surface reflectance products. Various aspects of the field si...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9849431/ |
| _version_ | 1828438394557956096 |
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| author | Andrew J. Walsh Guy Byrne Mark Broomhall |
| author_facet | Andrew J. Walsh Guy Byrne Mark Broomhall |
| author_sort | Andrew J. Walsh |
| collection | DOAJ |
| description | In this article, a novel approach to measuring in situ field uncertainties in surface reflectance is presented. This work is an outcome of a national campaign by Geoscience Australia to validate our analysis-ready Landsat 8 and Sentinel 2 surface reflectance products. Various aspects of the field site methodology that were expected to contribute significantly to uncertainties were identified and tested. These aspects included the instrumental uncertainty, the use of a rest to stabilize the spectroradiometer fore-optic, the repositioning of the panel used for calibrating reflectance, and uncertainties introduced by the operator of the equipment, following a standard methodology. Results for two field sites are presented, which consistently show that approximately 95% of the overall uncertainty is a result of inherent variability in the ground surface reflectance. Typically, 5% of the uncertainty is introduced by a combination of the instrumentation and methodology. |
| first_indexed | 2024-12-10T20:04:10Z |
| format | Article |
| id | doaj.art-f583e09c283146d2b1cd94057da1b907 |
| institution | Directory Open Access Journal |
| issn | 2151-1535 |
| language | English |
| last_indexed | 2024-12-10T20:04:10Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj.art-f583e09c283146d2b1cd94057da1b9072022-12-22T01:35:27ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing2151-15352022-01-01156248625810.1109/JSTARS.2022.31951209849431A Case Study of Measurement Uncertainty in Field SpectroscopyAndrew J. Walsh0https://orcid.org/0000-0001-9506-0855Guy Byrne1Mark Broomhall2Geoscience Australia, Canberra, ACT, AustraliaGeoscience Australia, Canberra, ACT, AustraliaGeoscience Australia, Canberra, ACT, AustraliaIn this article, a novel approach to measuring in situ field uncertainties in surface reflectance is presented. This work is an outcome of a national campaign by Geoscience Australia to validate our analysis-ready Landsat 8 and Sentinel 2 surface reflectance products. Various aspects of the field site methodology that were expected to contribute significantly to uncertainties were identified and tested. These aspects included the instrumental uncertainty, the use of a rest to stabilize the spectroradiometer fore-optic, the repositioning of the panel used for calibrating reflectance, and uncertainties introduced by the operator of the equipment, following a standard methodology. Results for two field sites are presented, which consistently show that approximately 95% of the overall uncertainty is a result of inherent variability in the ground surface reflectance. Typically, 5% of the uncertainty is introduced by a combination of the instrumentation and methodology.https://ieeexplore.ieee.org/document/9849431/Ground-based measurementsLandsat-8reflectanceSentinel-2a/buncertainty estimationvalidation |
| spellingShingle | Andrew J. Walsh Guy Byrne Mark Broomhall A Case Study of Measurement Uncertainty in Field Spectroscopy IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Ground-based measurements Landsat-8 reflectance Sentinel-2a/b uncertainty estimation validation |
| title | A Case Study of Measurement Uncertainty in Field Spectroscopy |
| title_full | A Case Study of Measurement Uncertainty in Field Spectroscopy |
| title_fullStr | A Case Study of Measurement Uncertainty in Field Spectroscopy |
| title_full_unstemmed | A Case Study of Measurement Uncertainty in Field Spectroscopy |
| title_short | A Case Study of Measurement Uncertainty in Field Spectroscopy |
| title_sort | case study of measurement uncertainty in field spectroscopy |
| topic | Ground-based measurements Landsat-8 reflectance Sentinel-2a/b uncertainty estimation validation |
| url | https://ieeexplore.ieee.org/document/9849431/ |
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