Iceberg topography and volume classification using TanDEM-X interferometry

Dammann, Dyre Oliver; Eriksson, Leif E. B.; Nghiem, S. V.; Pettit, E. C.; Sonntag, J. G.; Busche, Thomas; Meyer, Franz J.; Mahoney, Andrew R.

doi:10.5194/tc-13-1861-2019

Cited by 11 publications

(8 citation statements)

References 71 publications

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“…The application of InSAR-derived absolute ridge height has been demonstrated in past work [20,31], as well as the dm-scale accuracy of TanDEM-X-derived ice topography [34]. Depending on coherence and baselines, InSAR is therefore most relevant for evaluation of larger ridges several meters in height as opposed to rafting and other cm-scale changes in ice roughness.…”

Section: Discussionmentioning

confidence: 98%

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Evaluating Landfast Sea Ice Ridging near UtqiaġVik Alaska Using TanDEM-X Interferometry

et al. 2020

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Seasonal landfast sea ice stretches along most Arctic coastlines and serves as a platform for community travel and subsistence, industry operations, and as a habitat for marine mammals. Landfast ice can feature smooth ice and areas of m-scale roughness in the form of pressure ridges. Such ridges can significantly hamper trafficability, but if grounded can also serve to stabilize the shoreward ice. We investigate the use of synthetic aperture radar interferometry (InSAR) to assess the formation and movement of ridges in the landfast sea ice near Utqiaġvik, Alaska. The evaluation is based on the InSAR-derived surface elevation change between two TanDEM-X bistatic image pairs acquired during January 2012. We compare the results with backscatter intensity, coastal radar data, and SAR-derived ice drift and evaluate the utility of this approach and its relevance for evaluation of ridge properties, as well as landfast sea ice evolution, dynamics, and stability. Data Curation, M.M.; Writing-Original Draft Preparation, M.M.; Writing-Review & Editing

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Section: Discussionmentioning

confidence: 98%

“…TanDEM-X is a SAR constellation that allows for bistatic acquisition of images with temporal baselines in the order of milliseconds. This data has been used to assess the surface morphology and height of grounded ridges in the landfast ice near Utqiaġvik [20,31], sea ice in the Fram Strait [32,33], and icebergs in the Southern Sea [34].…”

Section: Introductionmentioning

confidence: 99%

Evaluating Landfast Sea Ice Ridging near UtqiaġVik Alaska Using TanDEM-X Interferometry

et al. 2020

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“…However, Kwok and Kacimi (2018) challenged this assumption using OIB data, finding that the snow thickness was often less than the snow freeboard. Deriving Antarctic snow thickness from OIB data and other remote-sensing methods is still an active area of research (Section 6.2.2), but Antarctic OIB data have provided crucial information to help develop and test new algorithms for satellite retrievals of freeboard and thickness of Antarctic sea ice (e.g., Fons & Kurtz, 2019;Kwok & Kacimi, 2018), along with iceberg topography and volume (e.g., Dammann et al, 2019).…”

Section: Sea Ice Thicknessmentioning

confidence: 99%

The Scientific Legacy of NASA’s Operation IceBridge

MacGregor

Boisvert

Medley

et al. 2021

Reviews of Geophysics

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The National Aeronautics and Space Administration (NASA)'s Operation IceBridge (OIB) was a 13-year (2009-2021) airborne mission to survey land and sea ice across the Arctic, Antarctic, and Alaska. Here, we review OIB's goals, instruments, campaigns, key scientific results, and implications for future investigations of the cryosphere. OIB's primary goal was to use airborne laser altimetry to bridge the gap in fine-resolution elevation measurements of ice from space between the conclusion of NASA's Ice, Cloud, and land Elevation Satellite (ICESat;2003-2009 and its follow-on, ICESat-2 (launched 2018). Additional scientific requirements were intended to contextualize observed elevation changes using a multisensor suite of radar sounders, gravimeters, magnetometers, and cameras. Using 15 different aircraft, OIB conducted 968 science flights, of which 42% were repeat surveys of land ice, 42% were surveys of previously unmapped terrain across the Greenland and Antarctic ice sheets, Arctic ice caps, and Alaskan glaciers, and 16% were surveys of sea ice. The combination of an expansive instrument suite and breadth of surveys enabled numerous fundamental advances in our understanding of the Earth's cryosphere. For land ice, OIB dramatically improved knowledge of interannual outlet-glacier variability, ice-sheet, and outlet-glacier thicknesses, snowfall rates on ice sheets, fjord and sub-ice-shelf bathymetry, and ice-sheet MACGREGOR ET AL.

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“…A coordinated campaign between the NASA's Operation IceBridge (OIB) airborne mission and the DLR's TanDEM-X satellite mission was successfully conducted on Oct 29, 2017, named as OIB/TanDEM-X Coordinated Science Campaign (OTASC) (Nghiem et al, 2018). The OTASC data have been successfully used in investigating the topography of iceberg (Dammann et al, 2019) and sea ice (Huang and Hajnsek, 2021).…”

Section: Campaign and Study Areamentioning

confidence: 99%

Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry

Huang¹,

Fischer²,

Hajnsek³

2021

Preprint

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Abstract. Single-pass interferometric synthetic aperture radar (InSAR) enables the possibility for sea ice topographic retrieval despite the inherent dynamics of sea ice. InSAR digital elevation models (DEM) are measuring the radar scattering centre height. The height bias induced by the penetration of electromagnetic waves into snow and ice leads to inaccuracies of the InSAR DEM, especially for multi-year sea ice with snow 5 cover. In this study, an elevation difference between the satellite-measured InSAR DEM and the airborne-measured optical DEM is observed from a coordinated campaign over the western Weddell Sea in Antarctica. The objective is to correct the penetration bias and generate a precise sea ice topographic map from the single-pass InSAR data. With the potential of retrieving sea ice geophysical information by the polarimetric-interferometry (Pol-InSAR) technique, a two-layer plus volume model is proposed to represent the sea ice vertical structure and its scattering mechanisms. Furthermore, a simplified version of the model is derived, to allow its inversion with limited a priori knowledge, which is then applied to a topographic retrieval scheme. The model-retrieved performance is validated with the optical DEM of the sea ice topography, showing an excellent performance with root-mean-square error as low as 0.22 m. The experiments are performed across four polarizations: HH, VV, Pauli-1 (HH+VV), and Pauli-2 (HH-VV), indicating the polarization-independent volume scattering property of the sea ice in the investigated co-polarized data.

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Iceberg topography and volume classification using TanDEM-X interferometry

Cited by 11 publications

References 71 publications

Evaluating Landfast Sea Ice Ridging near UtqiaġVik Alaska Using TanDEM-X Interferometry

Evaluating Landfast Sea Ice Ridging near UtqiaġVik Alaska Using TanDEM-X Interferometry

The Scientific Legacy of NASA’s Operation IceBridge

Antarctic snow-covered sea ice topography derivation from TanDEM-X using polarimetric SAR interferometry

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