Antonova, Sofia; Duguay, Claude R; Kääb, Andreas; Heim, Birgit; Langer, Moritz; Westermann, Sebastian; Boike, Julia (2016): Three-year time series of TerraSAR-X backscatter intensity and interferometric coherence for lakes in the Lena River Delta, Siberia, links to GeoTIFF images [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.873584, In supplement to: Antonova, S et al. (2016): Monitoring bedfast ice and ice phenology in lakes of the Lena River Delta using TerraSAR-X backscatter and coherence time series. Remote Sensing, 8(11), 903, https://doi.org/10.3390/rs8110903
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Abstract:
The goal of this study was to examine the potential of a unique X-band SAR dataset to monitor ice phenology and bedfast ice on a number of thermokarst lakes in the Siberian Arctic. Three-year repeat-pass TSX time series with high temporal (11 days) and spatial (10 m) resolution were used. Two different parameters derived from SAR imagery were employed in the analysis: backscatter intensity and 11-day interferometric coherence. In situ ice thickness measurements were collected at 14 locations from a sample of 10 lakes in April 2015. A region of interest (ROI) was created around each in situ ice thickness measurement location as a circle with a diameter of approximately 10 pixels. We provide extracted backscatter and coherence for all the ROIs as georeferenced .tif files for the entire time series.
Coverage:
Latitude: 72.328150 * Longitude: 126.284335
Event(s):
Kurungnakh_Island * Latitude: 72.328150 * Longitude: 126.284335 * Campaign: RU-Land_2013_Lena (Lena2013) * Basis: AWI Arctic Land Expedition * Method/Device: Satellite remote sensing (SAT)
Comment:
Input dataset includes 95 repeat-pass StripMap TerraSAR-X images acquired over the central Lena River Delta, Siberia, from 3 August 2012 to 2 October 2015 every 11 days with a few gaps. TerraSAR-X is a Synthetic Aperture Radar operating in X-band (wavelength 3.1 cm, frequency 9.6 GHz). The scene size measured approximately 18 × 56 km. The orbit was in descending pass and the radar was right-looking. The acquisition incidence angle was approximately 31° and the polarization channel was HH for all used images. Local time of acquisitions was 08:34 (UTC: 22:34). 95 backscatter intensity images, calibrated to sigma nought and converted to decibels, were obtained. 84 coherence images, each with a temporal baseline of 11 days, were obtained from interferometric pairs of coregistered TerraSAR-X images. Both the backscatter intensity images and the coherence images were geocoded to the WGS84 ellipsoid with a pixel size of 10 m 10 m in the Universal Transverse Mercator (UTM) projection Zone 52N.
The provided dataset includes two .zip files (for intensity and coherence data), each containing 14 folders named according to the ROIs, where "Fl-..." means floating ice and "Gr-..." means grounded (bedfast) ice. Each of 14 folders contains the entire time series of intensity or coherence for extracted ROI as georeferenced .tif files.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File name | File name | Antonova, Sofia | |||
| 2 | File format | File format | Antonova, Sofia | |||
| 3 | File size | File size | kByte | Antonova, Sofia | ||
| 4 | Uniform resource locator/link to file | URL file | Antonova, Sofia |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
12 data points