Pre-Launch Assessment of RADARSAT Constellation Mission Medium Resolution Modes for Sea Oil Slicks and Lookalike Discrimination

Dabboor, Mohammed; Singha, Suman; Montpetit, Benoît; Deschamps, Benjamin; Flett, D.

doi:10.1080/07038992.2019.1659722

Cited by 9 publications

(5 citation statements)

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“…Evaluation of the quality performance of RCM SAR imagery has shown improved real noise floor values compared to the nominal (Table 1) for all modes. The implementation of the stepped receive functionality in the RCM ScanSAR modes has contributed to improved image quality performance by reducing the noise equivalent sigma zero (NESZ) and range ambiguity [11,15].…”

Section: Mission Overview and Current Statusmentioning

confidence: 99%

“…Results of [9,10] provided initial guidance to Canada's national SAR wind system for the potential of wind information retrieval using RCM. The expected potential of RCM for maritime pollution monitoring was examined in [11]. In this study, simulated CP data of the StripMap medium resolution 16 m (16M), the ScanSAR medium resolution 30 m (30M), and the SC50M were investigated for their capabilities to discriminate mineral oil spills from lookalikes at different radar incidence angles.…”

Section: Introductionmentioning

confidence: 99%

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The RADARSAT Constellation Mission Core Applications: First Results

et al. 2022

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The Canadian RADARSAT Constellation Mission (RCM) has passed its early operation phase with the performance evaluation being currently active. This evaluation aims to confirm that the innovative design of the mission’s synthetic aperture radar (SAR) meets the expectations of intended users. In this study, we provide an overview of initial results obtained for three high-priority applications; flood mapping, sea ice analysis, and wetland classification. In our study, the focus is on results obtained using not only linear polarization, but also the adopted Compact Polarimetric (CP) architecture in RCM. Our study shows a promising level of agreement between RCM and RADARSAT-2 performance in flood mapping using dual-polarized HH-HV SAR data over Red River, Manitoba, suggesting smooth continuity between the two satellite missions for operational flood mapping. Visual analysis of coincident RCM CP and RADARSAT-2 dual-polarized HH-HV SAR imagery over the Resolute Passage, Canadian Central Arctic, highlighted an improved contrast between sea ice classes in dry ice winter conditions. A statistical analysis using selected sea ice samples confirmed the increased contrast between thin and both rough and deformed ice in CP SAR. This finding is expected to enhance Canadian Ice Service’s (CIS) operational visual analysis of sea ice in RCM SAR imagery for ice chart production. Object-oriented classification of a wetland area in Newfoundland and Labrador by fusion of RCM dual-polarized VV-VH data and Sentinel-2 optical imagery revealed promising classification results, with an overall accuracy of 91.1% and a kappa coefficient of 0.87. Marsh presented the highest user’s and producer’s accuracies (87.77% and 82.08%, respectively) compared to fog, fen, and swamp.

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Section: Mission Overview and Current Statusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The RADARSAT Constellation Mission Core Applications: First Results

et al. 2022

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“…In contrast, HCP's architecture is dualpolarized, albeit of a particular kind (as explained in Section III). Since it is a comparatively simple dualpol SAR that needs to transmit only one polarization per sample opportunity, an HCP SAR is fully compatible with wide swath imaging modes, including ScanSAR (Charbonneau et al 2010;Dabboor et al 2019aDabboor et al , 2019b. Polarimetric ScanSAR was first demonstrated from orbit on RISAT-1, for which its swath width 1, 5 typically was 223 km, while the same radar's FP swath width was only 25 km.…”

Section: Background Perspective: Fullypolarimetric Sarsmentioning

confidence: 99%

RADARSAT Constellation Mission’s Operational Polarimetric Modes: A User-Driven Radar Architecture

Raney

Brisco

Dabboor

et al. 2021

Canadian Journal of Remote Sensing

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Canada's Earth-observing RADARSAT Constellation Mission (RCM) is intended to serve operational users. The users' main objectives were to have routinely available high-quality quantitative information about their applications, with large area coverage potential. That two-part requirement was sufficient to establish an innovative synthetic aperture radar (SAR) polarimeter's end-to-end system profile, the hybrid compact polarimetric (HCP) architecture. HCP's essential and defining characteristic is circularly polarized transmission. This is sufficient to evaluate the backscatterer Stokes vector, but only half of the scattering matrix elements are measured. Hence image classification methodologies for linearly polarized full-(or quad-) pol (FP) radars that depend on knowledge of all four of the scattering matrix elements if applied to HCP-derived data lead to erroneous results. HCP-appropriate classifications are based on the Stokes vector. Related methods traditionally used for radar astronomy-for which circularly polarized transmission is the norm-are reviewed. Those known methods are extended, bringing to light fundamental characteristics of a polarimetric electromagnetic field. Analysis tools appropriate for HCP's polarimetric data are introduced. The resulting polarimetric portraits-defined as the Stokes vector of the backscattered field in response to balanced illumination of the scene-from FP and HCP polarimeters are shown to be equivalent. RÉSUMÉLa mission canadienne RADARSAT Constellation (RCM) vise a servir les utilisateurs op erationnels de donn ees d'observation de la Terre. Les principaux objectifs des utilisateurs etaient d'avoir r eguli erement des informations quantitatives de haute qualit e sur leurs applications, avec le potentiel de couvrir de grande surface. Cette exigence binôme etait suffisante pour etablir le profil de bout en bout d'un radar a ouverture synth etique (SAR) polarim etrique novateur avec une architecture polarim etrique compacte hybride (HCP). La caract eristique essentielle et d eterminante du HCP est la transmission polaris ee circulaire. Ceci est suffisant pour evaluer le vecteur de r etrodiffusion de Stokes, mais seulement la moiti e des el ements de la matrice de diffusion sont mesur es. Par cons equent, les m ethodes de classification d'images d evelopp ees pour les radars lin eairement polaris es (FP), d ependant de la connaissance des quatre el ements de la matrice de diffusion, conduisent a des r esultats erron es s'ils sont appliqu es aux donn ees d eriv ees d'un radar compact hybride. Les classifications adapt ees au radar HCP sont bas ees sur le vecteur de Stokes. Les m ethodes connexes traditionnellement utilis ees en astronomie pour des radars dont la transmission polaris ee circulairement est la norme sont examin ees dans cet article. Ces m ethodes connues sont expliqu ees, mettant en lumi ere les caract eristiques fondamentales d'un champ electromagn etique polarim etrique. Des outils d'analyse adapt es aux donn ees polarim etriques d'un radar HCP sont aussi pr es...

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“…Therefore, the recently proposed CP SAR configuration for Earth observation could be a compromised choice for SAR applications [3]. Different studies have explored the potential of CP SAR imagery for Earth observation applications, such as sea ice mapping [4]- [7], mineral oil spill detection [8]- [10], wetland monitoring [11], [12], wind speed estimation [13]- [15], and significant ocean wave height estimation [16], [17].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Compact Polarimetric SAR Parameters to Modeled Lake Ice Growth

Dabboor

Shokr

2021

IEEE Trans. Geosci. Remote Sensing

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Synthetic aperture radar (SAR) is a valuable tool for lake ice monitoring. The recently proposed SAR configuration for Earth observation called compact polarimetric (CP) SAR could be a good compromised choice between conventional (single or dual) and fully polarimetric (FP) SAR for operational ice applications, including lake ice. Given its enhanced radar target information compared with conventional SAR systems over wider swath coverage compared with FP SAR, CP systems could play important role in the new generation of Earth observation systems. Herein, we study the evolution of CP SAR parameters from simulated CP SAR data in relation to early ice growth. Focus of the study is on four lakes located in Cornwallis Island, Canadian Central Arctic. We adopt parameters extracted from dual circular polarimetric and right circular transmit, linear (horizontal and vertical) receive configurations. In this study, we consider the ice thickness calculated from an established empirical model. Meteorological and ice climatological data were used to support the analysis. Results demonstrated a potential connection between a number of CP parameters and lake ice growth. Furthermore, we were able to highlight the relationship between the density of air bubbles in ice layer and the intensity of volume scattering mechanism, leading to the identification of lakes with increased gas production activities. Thus, differences between lakes in terms of density of air bubbles were detected and statistically evaluated. Index Terms-Bubble in lake ice, compact polarimetric (CP) synthetic aperture radar (SAR), ice thickness, lake ice.This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination.

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Pre-Launch Assessment of RADARSAT Constellation Mission Medium Resolution Modes for Sea Oil Slicks and Lookalike Discrimination

Cited by 9 publications

References 50 publications

The RADARSAT Constellation Mission Core Applications: First Results

The RADARSAT Constellation Mission Core Applications: First Results

RADARSAT Constellation Mission’s Operational Polarimetric Modes: A User-Driven Radar Architecture

Sensitivity of Compact Polarimetric SAR Parameters to Modeled Lake Ice Growth

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