Effect of Prompt Particle Events on OLCI Ocean Color Imagery in the South Atlantic Anomaly: Detection and Removal

It has been found that cosmic rays and massive charged particles trapped in the magnetosphere or arriving from the sun might produce spike noise over the dark offset signal coming from charge-coupled devices (CCDs) on optic sensors such as Ocean and Land Color Instrument (Sentinel-3/OLCI) and Medium...

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Detalles Bibliográficos
Publicado: 2019
Materias:
Atmospheric correction
Ocean and Land Color Instrument (OLCI)
turbid waters
Charge coupled devices
Charged particles
Clouds
Color
Cosmology
Earth (planet)
Magnetic resonance imaging
Magnetosphere
Oceanography
Sensors
Atmospheric corrections
Kernel
Oceans
Turbid water
Pixels
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1545598X_v16_n2_p163_Gossn
http://hdl.handle.net/20.500.12110/paper_1545598X_v16_n2_p163_Gossn
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_1545598X_v16_n2_p163_Gossn
record_format dspace
spelling paper:paper_1545598X_v16_n2_p163_Gossn2023-06-08T16:21:12Z Effect of Prompt Particle Events on OLCI Ocean Color Imagery in the South Atlantic Anomaly: Detection and Removal Atmospheric correction Ocean and Land Color Instrument (OLCI) turbid waters Charge coupled devices Charged particles Clouds Color Cosmology Earth (planet) Magnetic resonance imaging Magnetosphere Oceanography Sensors Atmospheric corrections Kernel Ocean and Land Color Instrument (OLCI) Oceans Turbid water Pixels It has been found that cosmic rays and massive charged particles trapped in the magnetosphere or arriving from the sun might produce spike noise over the dark offset signal coming from charge-coupled devices (CCDs) on optic sensors such as Ocean and Land Color Instrument (Sentinel-3/OLCI) and Medium Resolution Imaging Spectrometer (Envisat/MERIS). These phenomena are called prompt particle events (PPEs) and in the case of OLCI, are the cause of isolated across-track pixel stripes present at the L1B imagery where the radiance values appear anomalously high/low with respect to their surroundings. The magnitude and frequency of these stripes are evidently higher in the region of the South Atlantic (Magnetic) Anomaly (SAA), which also covers central South America. In this region, PPE contamination at the top-of-atmosphere (TOA) radiances has a significant impact on water reflectance and biogeophysical product retrieval over the affected pixels, which means they must be detected and removed from the L1B imagery. In this letter, a PPE detection and removal algorithm is proposed to be applied over water bodies, based on a simple moving filter with a 5\\times 1 along-track kernel applied over the whole spectral set of OLCI TOA radiances. Its performance was evaluated visually and by comparing with preexistent predictions. Results indicate that images in the SAA region contain 27.8 times more PPE-contaminated pixels than images from outside the SAA and that the most affected bands are at 400 and 1016 nm, where the fraction of PPE-flagged pixels over the SAA reaches 0.14% and 0.26%, respectively. © 2004-2012 IEEE. 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1545598X_v16_n2_p163_Gossn http://hdl.handle.net/20.500.12110/paper_1545598X_v16_n2_p163_Gossn
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Atmospheric correction
Ocean and Land Color Instrument (OLCI)
turbid waters
Charge coupled devices
Charged particles
Clouds
Color
Cosmology
Earth (planet)
Magnetic resonance imaging
Magnetosphere
Oceanography
Sensors
Atmospheric corrections
Kernel
Ocean and Land Color Instrument (OLCI)
Oceans
Turbid water
Pixels
spellingShingle Atmospheric correction
Ocean and Land Color Instrument (OLCI)
turbid waters
Charge coupled devices
Charged particles
Clouds
Color
Cosmology
Earth (planet)
Magnetic resonance imaging
Magnetosphere
Oceanography
Sensors
Atmospheric corrections
Kernel
Ocean and Land Color Instrument (OLCI)
Oceans
Turbid water
Pixels
Effect of Prompt Particle Events on OLCI Ocean Color Imagery in the South Atlantic Anomaly: Detection and Removal
topic_facet Atmospheric correction
Ocean and Land Color Instrument (OLCI)
turbid waters
Charge coupled devices
Charged particles
Clouds
Color
Cosmology
Earth (planet)
Magnetic resonance imaging
Magnetosphere
Oceanography
Sensors
Atmospheric corrections
Kernel
Ocean and Land Color Instrument (OLCI)
Oceans
Turbid water
Pixels
description It has been found that cosmic rays and massive charged particles trapped in the magnetosphere or arriving from the sun might produce spike noise over the dark offset signal coming from charge-coupled devices (CCDs) on optic sensors such as Ocean and Land Color Instrument (Sentinel-3/OLCI) and Medium Resolution Imaging Spectrometer (Envisat/MERIS). These phenomena are called prompt particle events (PPEs) and in the case of OLCI, are the cause of isolated across-track pixel stripes present at the L1B imagery where the radiance values appear anomalously high/low with respect to their surroundings. The magnitude and frequency of these stripes are evidently higher in the region of the South Atlantic (Magnetic) Anomaly (SAA), which also covers central South America. In this region, PPE contamination at the top-of-atmosphere (TOA) radiances has a significant impact on water reflectance and biogeophysical product retrieval over the affected pixels, which means they must be detected and removed from the L1B imagery. In this letter, a PPE detection and removal algorithm is proposed to be applied over water bodies, based on a simple moving filter with a 5\\times 1 along-track kernel applied over the whole spectral set of OLCI TOA radiances. Its performance was evaluated visually and by comparing with preexistent predictions. Results indicate that images in the SAA region contain 27.8 times more PPE-contaminated pixels than images from outside the SAA and that the most affected bands are at 400 and 1016 nm, where the fraction of PPE-flagged pixels over the SAA reaches 0.14% and 0.26%, respectively. © 2004-2012 IEEE.
title Effect of Prompt Particle Events on OLCI Ocean Color Imagery in the South Atlantic Anomaly: Detection and Removal
title_short Effect of Prompt Particle Events on OLCI Ocean Color Imagery in the South Atlantic Anomaly: Detection and Removal
title_full Effect of Prompt Particle Events on OLCI Ocean Color Imagery in the South Atlantic Anomaly: Detection and Removal
title_fullStr Effect of Prompt Particle Events on OLCI Ocean Color Imagery in the South Atlantic Anomaly: Detection and Removal
title_full_unstemmed Effect of Prompt Particle Events on OLCI Ocean Color Imagery in the South Atlantic Anomaly: Detection and Removal
title_sort effect of prompt particle events on olci ocean color imagery in the south atlantic anomaly: detection and removal
publishDate 2019
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1545598X_v16_n2_p163_Gossn
http://hdl.handle.net/20.500.12110/paper_1545598X_v16_n2_p163_Gossn
_version_ 1768542429071278080

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