Super Resolution and Interferences Suppression Technique Applied to SHARAD Data

Raguso, Maria Carmela; Mastrogiuseppe, Marco; Seu, R.; Piazzo, Lorenzo

doi:10.1109/metroaerospace.2018.8453529

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…However, the proposed method has a general applicability and can be used to help scientists on radar data interpretation, for example, in the detection of subsurface water-ice resources at the Martian mid-latitudes [17] or looking ahead to the Jovian icy-moon sounders (radar for icy moon exploration (RIME) [18] and Radar for Europa Assessment and Sounding: Ocean to Near-Surface (REASON) [19]) in case geometrical orbital parameters allow repeated ground track to be acquired. Additional improvements to this clutter discrimination technique can be done by applying super-resolution techniques [20] to the radargrams before the co-registration step for improving the resolution of radar products. As future works, we plan to explore and test deep learning algorithms for automatic clutter features recognition [21] in orbital radar sounder products.…”

Section: Discussionmentioning

confidence: 99%

Clutter Detection and Surface/Subsurface Slope Determination by Combination of Repeat-Pass Sounder Orbits Applied to SHARAD Data

Raguso

Mastrogiuseppe²,

Seu³

2022

IEEE Geosci. Remote Sensing Lett.

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Nadir-looking low-frequency radar sounders cannot easily resolve off-nadir surface returns from the subsurface nadir echoes. Cross-track surface echoes (also named "clutter") with time delays synchronized with subsurface returns are renowned for being a major challenge for scientists, as they can affect the analysis of orbital radar sounders data. We present a method for clutter discrimination and surface/subsurface slope estimation using data acquired from radar sounders in closely spaced repeated orbits configuration. The method takes advantage of cross-track signal migration to discriminate off-nadir clutter from subsurface signal returns received at the nadir. The migration of the off-nadir signals is also used to determine the clutter direction of arrival (DOA) as well as the surface/subsurface crosstrack slopes. The effectiveness of the method has been proven on the Mars Reconnaissance Orbiter (MRO)'s Shallow Radar (SHARAD) dataset and provides a proof-of-concept demonstration for the surface clutter discrimination when radar sounders repeated-passes data are available.

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Section: Discussionmentioning

confidence: 99%

Clutter Detection and Surface/Subsurface Slope Determination by Combination of Repeat-Pass Sounder Orbits Applied to SHARAD Data

Raguso

Mastrogiuseppe²,

Seu³

2022

IEEE Geosci. Remote Sensing Lett.

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“…• The 1st bathymetry of a Titan sea using Cassini (NASA) radar data (Mastrogiuseppe et al, 2014) • The improvement of the stratigraphic analysis of Martian polar ice sheets using the SHARAD (MRO, NASA) radar sounder data, after both BWE and EMI removal by BWI (Raguso et al, 2018) (Raguso et al, 2023).…”

Section: Statement Of Needmentioning

confidence: 99%

PyBWE: Python tools for Bandwidth Extrapolation of planetary radar signals

Oudart

2024

JOSS

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PyBWE is a Python library containing radar super-resolution methods known as "Bandwidth Extrapolation" (BWE).Range resolution enhancement is one of the main challenges in radar signal processing. It is driven by the time resolution of radar soundings, and the speed of electromagnetic waves in the sounded material. Time resolution being limited by the frequency bandwidth of the instrument, the same applies to range resolution: the larger the bandwidth, the more enhanced the resolution.

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“…By means of the waveform fitting approach that was able to reproduce the saturation effects at the receiver [50], Mastrogiuseppe and colleagues re-analyzed saturated altimetric data that were acquired during fly-by T49 on 21 December 2008, to extract information regarding the depth and composition of southern Ontario Lacus [53]. An optimized signal processing, which adopted super resolution techniques [54,55], revealed the presence of lakebed signal reflections at~50 m of maximum depth, which was consistent with the indirect measurements of bathymetry as extrapolated from the shorelines slope measured from altimetry [46]. Assuming a similar ternary composition, the best fit loss tangent at Ontario Lacus (6 ± 3 × 10 −5 ) was found to be consistent with~47% CH 4 ,~40% C 2 H 6 , and~13% N 2 .…”

Section: Bathymetric Measurements Of Titan's Seasmentioning

confidence: 99%

Dual Frequency Orbiter-Radar System for the Observation of Seas and Tides on Titan: Extraterrestrial Oceanography from Satellite

Mastrogiuseppe

2019

Remote Sensing

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Saturn’s largest moon, Titan, is believed to have a ~100 km thick ice shell above a global ocean of liquid water. Organic materials, including liquid hydrocarbon lakes and seas in its polar terrain, cover Titan’s surface, which makes it a world of two oceans. The RADAR instrument on board Cassini, was able to probe lakes and seas during few dedicated altimetric observations, revealing its capability to work as a sounder. Herein, we describe the design of, and scientific motivation for, a dual frequency X/Ka-band radar system that is able to investigate Titan’s subsurface liquid water ocean, as well as the depth and composition of its surface liquid hydrocarbon basins. The proposed system, which could take advantage of the telecommunications dish, can operate as a sounder, as Synthetic Aperture Radar (SAR) able to map the surface at tens meters of scale resolution, and when data are acquired from close-adjacent orbits, as a repeat-pass SAR interferometer (InSAR). The instrument, which is based on the architecture of the Cassini RADAR, can also characterize Titan’s interior by using geophysical measurements of the tidal amplitude to derive high accuracy estimates of the Love number h2 from a 1500 km circular orbit.

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Super Resolution and Interferences Suppression Technique Applied to SHARAD Data

Cited by 15 publications

References 12 publications

Clutter Detection and Surface/Subsurface Slope Determination by Combination of Repeat-Pass Sounder Orbits Applied to SHARAD Data

Clutter Detection and Surface/Subsurface Slope Determination by Combination of Repeat-Pass Sounder Orbits Applied to SHARAD Data

PyBWE: Python tools for Bandwidth Extrapolation of planetary radar signals

Dual Frequency Orbiter-Radar System for the Observation of Seas and Tides on Titan: Extraterrestrial Oceanography from Satellite

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