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Record W2269655503 · doi:10.1080/07038992.2015.1104633

Overview of the RADARSAT Constellation Mission

2015· article· en· W2269655503 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

venuePublished in a venue whose home country is Canada.
aboutThe title or abstract carries a Canadian signal from the geographic lexicon.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueCanadian Journal of Remote Sensing · 2015
Typearticle
Languageen
FieldEngineering
TopicSynthetic Aperture Radar (SAR) Applications and Techniques
Canadian institutionsnot available
Fundersnot available
KeywordsConstellationRemote sensingSynthetic aperture radarPolarimetryComputer scienceSatelliteSpacecraftAzimuthGround segmentSystems engineeringAerospace engineeringEngineeringGeographyPhysics

Abstract

fetched live from OpenAlex

. The RADARSAT Constellation Mission (RCM) is a Canadian synthetic aperture radar (SAR) mission consisting of the design, construction, launch, and operation of three C-band SAR satellites as well as the design and build of an associated ground segment. RCM is currently being implemented by a Canadian industrial team led by MacDonald Dettwiler and Associates (MDA) under contract to the Canadian Space Agency (CSA). This article provides an overview of the RCM. A description of how mission requirements drove the selection of key mission parameters is given, including number of satellites, orbit selection, and major radar parameters. Emphasis is placed on providing a description of those capabilities of RCM that are unique or innovative. These capabilities include a constellation optimized for coherent change detection (CCD), a compact polarimetry mode, special imaging modes optimized for ship detection, and a combined SAR and automatic identification system (AIS) capability. To support CCD, the system design includes maintaining the satellites in a narrow orbital tube, a tight requirement on azimuth antenna pointing control, and ScanSAR burst timing calculated from on-orbit spacecraft location data in order to accurately synchronize ScanSAR bursts with along-track position. For compact polarimetry, a capability to transmit circular polarization and receive horizontal (H) and vertical (V) polarizations simultaneously is part of the design. For ship detection, innovative ScanSAR modes are used with a large number of beams and variable resolution and number of looks designed to optimize ship detection across a wide swath. The combined SAR and AIS capability is achieved with an AIS instrument using both on-board AIS processing and on-ground AIS processing.Résumé. La mission de la Constellation RADARSAT (MCR) est une mission canadienne de radars à synthèse d’ouverture (SAR) qui consiste en la conception, la construction, le lancement et l’exploitation de trois satellites SAR en bande C ainsi que de la conception et la construction d’un segment au sol associé. Le MCR est actuellement mis en œuvre par une équipe industrielle canadienne dirigée par MacDonald Dettwiler and Associates (MDA) sous contrat avec l’Agence spatiale canadienne (ASC). Ce document donne un aperçu de la MCR. Nous décrivons la façon dont les exigences de la mission ont conduit à la sélection des paramètres clés de la mission, y compris le nombre de satellites, la sélection de l’orbite et les principaux paramètres radar. L’accent est mis sur la description des capacités uniques ou innovantes de la MCR. Ces capacités comprennent une constellation optimisée pour la détection de changement cohérent (CCD), un mode de polarimétrie compacte, des modes d’imagerie spéciaux optimisés pour la détection des navires et une capacité combinée du SAR et du système d’identification automatique (AIS). Pour permettre la CCD, la conception du système comprend la maintenance des satellites dans un tube orbital étroit, une exigence stricte sur le contrôle de pointage de l’antenne d’azimut, et la synchronisation des rafales du ScanSAR calculée à partir des données de localisation en orbite du satellite afin de synchroniser avec précision les rafales du ScanSAR avec la position le long de la piste. Pour la polarimétrie compacte, une capacité de transmettre la polarisation circulaire et de recevoir les polarisations horizontales (H) et verticales (V) simultanément est une partie de la conception. Pour la détection des navires, les modes innovants du ScanSAR sont utilisés avec un grand nombre de faisceaux, des résolutions et des nombres de visées variables qui sont conçus pour optimiser la détection des navires à travers une large fauchée. La capacité combinée du SAR et du AIS est réalisée avec un instrument AIS utilisant à la fois le traitement AIS à bord et le traitement AIS au sol.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Other design · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: none
Teacher disagreement score0.997
Threshold uncertainty score0.189

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.035
GPT teacher head0.243
Teacher spread0.208 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it