Incidence Angle Diversity on L-Band Microwave Radiometry and Its Impact on Consistent Soil Moisture Retrievals
Incidence angle diversity of space-borne L-band radiometers needs to be taken into account for a consistent estimation of surface soil moisture (SM). In this study, the Land Parameter Retrieval Model (LPRM) is applied to SMOS brightness temperatures to calibrate the effective scattering albedo (w) and the soil roughness (h 1 ) parameter against ERA5-land SM. The analysis is carried out for SMOS data at three different incidence angles ( 32.5±5∘, 42.5±5∘ and 52.5±5∘ ) focusing in 2016 on the three main land cover types of the Iberian Peninsula according to the Climate Change Initiative (agricultural, forest and grassland). The parameterization shows an increasing trend of w and h 1 with rise of incidence angle. The SM retrieval have been evaluated with in situ SM measurements of the REMEDHUS network on rainfed crop fields. Both compare well at the three incidence angles, obtaining high correlations (0.81-0.85), an ubRMSE around 0.04 m 3 m −3 and low bias (0-0.015 m 3 m −3)
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Institute of Electrical and Electronics Engineers
2021-07
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Online Access: | http://hdl.handle.net/10261/267198 http://dx.doi.org/10.13039/501100011033 |
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dig-icm-es-10261-2671982022-11-04T17:10:46Z Incidence Angle Diversity on L-Band Microwave Radiometry and Its Impact on Consistent Soil Moisture Retrievals Portal, Gerard Vall-llossera, Mercè Jagdhuber, Thomas Camps, Adriano Pablos, Miriam Piles, María Agencia Estatal de Investigación (España) Incidence angle diversity of space-borne L-band radiometers needs to be taken into account for a consistent estimation of surface soil moisture (SM). In this study, the Land Parameter Retrieval Model (LPRM) is applied to SMOS brightness temperatures to calibrate the effective scattering albedo (w) and the soil roughness (h 1 ) parameter against ERA5-land SM. The analysis is carried out for SMOS data at three different incidence angles ( 32.5±5∘, 42.5±5∘ and 52.5±5∘ ) focusing in 2016 on the three main land cover types of the Iberian Peninsula according to the Climate Change Initiative (agricultural, forest and grassland). The parameterization shows an increasing trend of w and h 1 with rise of incidence angle. The SM retrieval have been evaluated with in situ SM measurements of the REMEDHUS network on rainfed crop fields. Both compare well at the three incidence angles, obtaining high correlations (0.81-0.85), an ubRMSE around 0.04 m 3 m −3 and low bias (0-0.015 m 3 m −3) With the institutional support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S) Peer reviewed 2022-04-19T11:41:03Z 2022-04-19T11:41:03Z 2021-07 capítulo de libro http://purl.org/coar/resource_type/c_3248 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS (2021) 978-1-6654-0369-6 CEX2019-000928-S http://hdl.handle.net/10261/267198 10.1109/IGARSS47720.2021.9553132 http://dx.doi.org/10.13039/501100011033 en Postprint https://doi.org/10.1109/IGARSS47720.2021.9553132 Sí open Institute of Electrical and Electronics Engineers |
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Incidence angle diversity of space-borne L-band radiometers needs to be taken into account for a consistent estimation of surface soil moisture (SM). In this study, the Land Parameter Retrieval Model (LPRM) is applied to SMOS brightness temperatures to calibrate the effective scattering albedo (w) and the soil roughness (h 1 ) parameter against ERA5-land SM. The analysis is carried out for SMOS data at three different incidence angles ( 32.5±5∘, 42.5±5∘ and 52.5±5∘ ) focusing in 2016 on the three main land cover types of the Iberian Peninsula according to the Climate Change Initiative (agricultural, forest and grassland). The parameterization shows an increasing trend of w and h 1 with rise of incidence angle. The SM retrieval have been evaluated with in situ SM measurements of the REMEDHUS network on rainfed crop fields. Both compare well at the three incidence angles, obtaining high correlations (0.81-0.85), an ubRMSE around 0.04 m 3 m −3 and low bias (0-0.015 m 3 m −3) |
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Agencia Estatal de Investigación (España) |
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Agencia Estatal de Investigación (España) Portal, Gerard Vall-llossera, Mercè Jagdhuber, Thomas Camps, Adriano Pablos, Miriam Piles, María |
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Portal, Gerard Vall-llossera, Mercè Jagdhuber, Thomas Camps, Adriano Pablos, Miriam Piles, María |
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Portal, Gerard Vall-llossera, Mercè Jagdhuber, Thomas Camps, Adriano Pablos, Miriam Piles, María Incidence Angle Diversity on L-Band Microwave Radiometry and Its Impact on Consistent Soil Moisture Retrievals |
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Portal, Gerard |
title |
Incidence Angle Diversity on L-Band Microwave Radiometry and Its Impact on Consistent Soil Moisture Retrievals |
title_short |
Incidence Angle Diversity on L-Band Microwave Radiometry and Its Impact on Consistent Soil Moisture Retrievals |
title_full |
Incidence Angle Diversity on L-Band Microwave Radiometry and Its Impact on Consistent Soil Moisture Retrievals |
title_fullStr |
Incidence Angle Diversity on L-Band Microwave Radiometry and Its Impact on Consistent Soil Moisture Retrievals |
title_full_unstemmed |
Incidence Angle Diversity on L-Band Microwave Radiometry and Its Impact on Consistent Soil Moisture Retrievals |
title_sort |
incidence angle diversity on l-band microwave radiometry and its impact on consistent soil moisture retrievals |
publisher |
Institute of Electrical and Electronics Engineers |
publishDate |
2021-07 |
url |
http://hdl.handle.net/10261/267198 http://dx.doi.org/10.13039/501100011033 |
work_keys_str_mv |
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