Normalized C-HH backscatter from Sentinel-1 (December, 2014-2017) for selected tundra regions
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2019
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| _version_ | 1867168196999512064 |
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| author | Widhalm, Barbara Bartsch, Annett Goler, Robert |
| author_facet | Widhalm, Barbara Bartsch, Annett Goler, Robert |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Synthetic aperture radar (SAR) applications often require normalization to a common incidence angle. Angular signatures of radar backscatter depend on surface roughness and vegetation cover, and thus differ, from location to location. Comprehensive reference datasets are therefore required in heterogeneous landscapes. Multiple acquisitions from overlapping orbits with sufficient incidence angle range are processed in order to obtain parameters of the location specific normalization function. We propose a simpler method for C-band data, using single scenes only. It requires stable dielectric properties (no variations of liquid water content). This method is therefore applicable for frozen conditions. Winter C-band data have been shown of high value for a number of applications in high latitudes before. In this paper we explore the relationship of incidence angle and Sentinel-1 backscatter across the tundra to boreal transition zone. A linear relationship (coefficient of determination R2 = 0.64) can be found between backscatter and incidence angle dependence (slope of normalization function) as determined by multiple acquisitions on a pixel by pixel basis for typical land cover classes in these regions. This allows a simplified normalization and thus reduced processing effort for applications over larger areas. The following regions are covered in the dataset: Yamal peninsula (Russia), Usa Basin (Russia), Lena Delta (Russia), Mackenzie Delta (Canada), Barrow, Toolik and Teshekpuk Lake region (Alaska). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_897046 |
| institution | PANGAEA |
| language | en |
| publishDate | 2019 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Normalized C-HH backscatter from Sentinel-1 (December, 2014-2017) for selected tundra regions Widhalm, Barbara Bartsch, Annett Goler, Robert Alaska, USA; AWI_PerDyn; C01_Barrow; C02_Toolik; C03_Teshekpuk; C04_Mackenzie_Delta; C07_Lena_Delta; C14_UsaBasin; Cryosphere; ESA Data User Element - GlobPermafrost; ESA-DUE-GlobPermafrost; Event label; File content; File format; File name; File size; MON; Monitoring; Permafrost Research (Periglacial Dynamics) @ AWI; Siberia, Russia; T01_Westsiberia; Uniform resource locator/link to file; Usa River basin, Northeast European Russia Synthetic aperture radar (SAR) applications often require normalization to a common incidence angle. Angular signatures of radar backscatter depend on surface roughness and vegetation cover, and thus differ, from location to location. Comprehensive reference datasets are therefore required in heterogeneous landscapes. Multiple acquisitions from overlapping orbits with sufficient incidence angle range are processed in order to obtain parameters of the location specific normalization function. We propose a simpler method for C-band data, using single scenes only. It requires stable dielectric properties (no variations of liquid water content). This method is therefore applicable for frozen conditions. Winter C-band data have been shown of high value for a number of applications in high latitudes before. In this paper we explore the relationship of incidence angle and Sentinel-1 backscatter across the tundra to boreal transition zone. A linear relationship (coefficient of determination R2 = 0.64) can be found between backscatter and incidence angle dependence (slope of normalization function) as determined by multiple acquisitions on a pixel by pixel basis for typical land cover classes in these regions. This allows a simplified normalization and thus reduced processing effort for applications over larger areas. The following regions are covered in the dataset: Yamal peninsula (Russia), Usa Basin (Russia), Lena Delta (Russia), Mackenzie Delta (Canada), Barrow, Toolik and Teshekpuk Lake region (Alaska). |
| title | Normalized C-HH backscatter from Sentinel-1 (December, 2014-2017) for selected tundra regions |
| topic | Alaska, USA; AWI_PerDyn; C01_Barrow; C02_Toolik; C03_Teshekpuk; C04_Mackenzie_Delta; C07_Lena_Delta; C14_UsaBasin; Cryosphere; ESA Data User Element - GlobPermafrost; ESA-DUE-GlobPermafrost; Event label; File content; File format; File name; File size; MON; Monitoring; Permafrost Research (Periglacial Dynamics) @ AWI; Siberia, Russia; T01_Westsiberia; Uniform resource locator/link to file; Usa River basin, Northeast European Russia |
| url | https://doi.org/10.1594/PANGAEA.897046 |