Integration of TerraSAR-X, RapidEye and airborne lidar for remote sensing of intertidal bedforms on the upper flats of Norderney (German Wadden Sea)

Adolph, Winny; Jung, Richard; Schmidt, Ahlert; Ehlers, Manfred; Heipke, Christian; Bartholomä, Alexander; Farke, Hubert

doi:10.1007/s00367-016-0485-z

Cited by 10 publications

(10 citation statements)

References 28 publications

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“…Garmin's GPSmap 62s was used for the GPS measurements, the photos were taken with cameras with GPS functionality. Additionally, the bedforms in the upper flats of Norderney were validated by high-precision height measurements recorded by Real Time Kinematic Differential GPS (RTK-DGPS) with a Leica Differential-GPS SR530 and AT 502 antenna type, see [19,20]. Furthermore, Remote Sens.…”

Section: Ground Truth Monitoring and Environmental Datamentioning

confidence: 99%

“…Environmental background information included water level data from the gauges at Borkum Fischerbalje, Norderney Riffgat, Spiekeroog, Wangerooge West and Wangerooge East (source: Federal Waterways and Shipping Administration WSV, provided by Federal Institute for Hydrology BfG), as well as wind speed and direction data from the weather stations on Borkum, Norderney and Spiekeroog (source: German Weather Service DWD). Differential GPS (RTK-DGPS) with a Leica Differential-GPS SR530 and AT 502 antenna type, see [19,20]. Furthermore, data from the annual mussel monitoring program of the National Park authority in Lower Saxony (NLPV) were used which are obtained by interpretation of aerial photographs.…”

Section: Ground Truth Monitoring and Environmental Datamentioning

confidence: 99%

“…[50] investigated the use of multi-frequency SAR data for sediment classification and for the detection of bivalve beds. Results from the DeMarine projects [10,11,14] and the WIMO project [15,17,20] have also shown that a combination of high spatial resolution SAR data and specific spectral resolution (specific wavelengths) benefits the classification of intertidal habitats. New algorithms and procedures in the area of neural network deep learning [51,52] may also bring advances in information extraction from satellite data.…”

Section: Contribution Of Satellite Sar For Future Monitoring Of Tidalmentioning

confidence: 99%

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Remote Sensing Intertidal Flats with TerraSAR-X. A SAR Perspective of the Structural Elements of a Tidal Basin for Monitoring the Wadden Sea

et al. 2018

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Spatial distribution and dynamics of intertidal habitats are integral elements of the Wadden Sea ecosystem, essential for the preservation of ecosystem functions and interlocked with geomorphological processes. Protection and monitoring of the Wadden Sea is mandatory and remote sensing is required to survey the extensive, often inaccessible tidal area. Mainly airborne techniques are carried out for decades. High-resolution satellite-borne sensors now enable new possibilities with satellite synthetic aperture radar (SAR) offering high availability of acquisitions during low water time due to independence from daylight and cloud cover. More than 100 TerraSAR-X images from 2009 to 2016 were used to examine the reproduction of intertidal habitats and macrostructures from the flats south of the island of Norderney and comparative areas in the Lower Saxony Wadden Sea. As a non-specific, generic approach to distinguish various and variable surface types continuously influenced by tidal dynamics, visual analysis was chosen which was supported by extensive in situ data. This technically unsophisticated access enabled us to identify mussel beds, fields of shell-detritus, gully structures, mud fields, and bedforms, the latter detected in the upper flats of every East Frisian island. Based on the high frequency of TerraSAR-X recordings for the Norderney area, a bedform shift was observed in a time-series from 2009 to 2015. For the same period, the development of a mud field with an adjoining depression was traced. Beside seasonal variations of the mud field, the formation of a mussel bed settling in the depression was imaged over the years. This study exemplifies the relevance of TerraSAR-X imagery for Wadden Sea remote sensing. Further development of classification methods for current SAR data together with open access availability should contribute to large-scale surveys of intertidal surface structures of geomorphic or biogenic origin and improve monitoring and long-term ecological research in the Wadden Sea and related tidal areas.

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Section: Ground Truth Monitoring and Environmental Datamentioning

confidence: 99%

Section: Ground Truth Monitoring and Environmental Datamentioning

confidence: 99%

Section: Contribution Of Satellite Sar For Future Monitoring Of Tidalmentioning

confidence: 99%

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Remote Sensing Intertidal Flats with TerraSAR-X. A SAR Perspective of the Structural Elements of a Tidal Basin for Monitoring the Wadden Sea

et al. 2018

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“…Tidal flats [151,152], salt marshes [153] and submarine ground water discharge [154] are monitored. Intertidal bedform shifts are investigated and the impact on sediments and benthic macrofauna [155] is assessed. For coastal protection purposes, oil spill detection and monitoring is performed [156][157][158].…”

Section: Hydrospherementioning

confidence: 99%

Ten Years of Experience with Scientific TerraSAR-X Data Utilization

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Marschalk

Winkler³

et al. 2018

Remote Sensing

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This paper presents the first comprehensive review on the scientific utilization of earth observation data provided by the German TerraSAR-X mission. It considers the different application fields and technical capabilities to identify the key applications and the preferred technical capabilities of this high-resolution SAR satellite system from a scientific point of view. The TerraSAR-X mission is conducted in a close cooperation with industry. Over the past decade, scientists have gained access to data through a proposal submission and evaluation process. For this review, we have considered 1636 data utilization proposals and analyzed 2850 publications. In general, TerraSAR-X data is used in a wide range of geoscientific research areas comprising anthroposphere, biosphere, cryosphere, geosphere, and hydrosphere. Methodological and technical research is a cross-cutting issue that supports all geoscientific fields. Most of the proposals address research questions concerning the geosphere, whereas the majority of the publications focused on research regarding “methods and techniques”. All geoscientific fields involve systematic observations for the establishment of time series in support of monitoring activities. High-resolution SAR data are mainly used for the determination and investigation of surface movements, where SAR interferometry in its different variants is the predominant technology. However, feature tracking techniques also benefit from the high spatial resolution. Researchers make use of polarimetric SAR capabilities, although they are not a key feature of the TerraSAR-X system. The StripMap mode with three meter spatial resolution is the preferred SAR imaging mode, accounting for 60 percent of all scientific data acquisitions. The Spotlight modes with the highest spatial resolution of less than one meter are requested by only approximately 30 percent of the newly acquired TerraSAR-X data.

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“…In this context, habitat mapping by different remote sensing methods was performed for a selected area in the Wadden Sea. Adolph et al (2016a) analysed data from airborne lidar, satellite-based radar (TerraSAR-X) and satellite-based electro-optical sensors (RapidEye) which imaged a backbarrier tidal flat. Results show how the performance of the different sensors relates to different surface characteristics and how they can be applied to characterize distinct sedimentological and morphological features.…”

Section: Inter-comparison Of Methodsmentioning

confidence: 99%

Monitoring concepts for an evaluation of marine environmental states in the German Bight

Winter

2017

Geo-Mar Lett

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Integration of TerraSAR-X, RapidEye and airborne lidar for remote sensing of intertidal bedforms on the upper flats of Norderney (German Wadden Sea)

Cited by 10 publications

References 28 publications

Remote Sensing Intertidal Flats with TerraSAR-X. A SAR Perspective of the Structural Elements of a Tidal Basin for Monitoring the Wadden Sea

Remote Sensing Intertidal Flats with TerraSAR-X. A SAR Perspective of the Structural Elements of a Tidal Basin for Monitoring the Wadden Sea

Ten Years of Experience with Scientific TerraSAR-X Data Utilization

Monitoring concepts for an evaluation of marine environmental states in the German Bight

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