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Record W4407251565 · doi:10.4095/pgf517rsk9

Simplified Level 2 Vegetation Processor – Canada Centre for Remote Sensing (SL2P-CCRS) for estimating biophysical variables using multispectral-imager data

2025· report· fr· W4407251565 on OpenAlexaboutno aff
Richard Fernandes, Najib Djamai

Bibliographic record

Venuenot available
Typereport
Languagefr
FieldEnvironmental Science
TopicRemote Sensing in Agriculture
Canadian institutionsnot available
Fundersnot available
KeywordsMultispectral imageRemote sensingVegetation (pathology)Environmental scienceMultispectral pattern recognitionComputer scienceGeographyCartography

Abstract

fetched live from OpenAlex

Il existe un consensus sur la nécessité de surveiller globalement les variables biophysiques du couvert végétal à une résolution moyenne (<1 ha) et avec une fréquence de <=10 jours (Organisation Météorologique Mondiale, 2016). Les capteurs satellites multispectraux conçus pour satisfaire aux exigences de mesure pour cette tâche sont et continueront d'être disponibles (https://gcos.wmo.int/en/essential-climate-variables/requirements). Le Simplified Level 2 Processor – D (SL2P-D) produit des estimations des variables biophysiques du couvert végétal à partir d'entrées de réflectance multispectrale bidirectionnelle, soit en haut de l'atmosphère (TOA), soit en haut du couvert végétal (TOC), ainsi que des angles d'illumination, de vue et d'azimut relatif. Des modèles de régression non linéaires distincts sont utilisés pour estimer la valeur attendue et l'erreur quadratique moyenne attendue de chaque variable. Les estimateurs de régression sont optimisés pour les entrées de réflectance multispectrale (c'est-à-dire <10 bandes avec une largeur de bande >10 nm) mais peuvent être appliqués à des spectres arbitraires tant qu'un modèle de transfert radiatif avec une précision suffisante pour simuler ces spectres est inclus dans le processeur. La paramétrisation, l'algorithme et les résultats d'échantillons du SL2PD sont présentés et comparés à son prédécesseur, SL2P (Weiss et Baret, 2016).

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.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.003
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Other · Consensus signal: none
Teacher disagreement score0.627
Threshold uncertainty score0.741

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.003
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0000.001
Bibliometrics0.0010.002
Science and technology studies0.0010.000
Scholarly communication0.0010.001
Open science0.0020.001
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0250.017

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 head0.073
GPT teacher head0.303
Teacher spread0.230 · 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

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreOther

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

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Citations0
Published2025
Admission routes1
Has abstractyes

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