Comparison of Valid Ocean Observations Between MODIS Terra and Aqua Over the Global Oceans
Ocean color satellite missions to measure the biophysical and geochemical properties of the surface ocean need to consider not only the spectral and spatial requirements of the sensors but also the satellite overpass time to maximize valid observations. The valid observations are impacted not only b...
Published in: | IEEE Transactions on Geoscience and Remote Sensing |
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Digital Commons @ University of South Florida
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Online Access: | https://digitalcommons.usf.edu/msc_facpub/1995 https://doi.org/10.1109/TGRS.2015.2483500 |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-2936 2023-07-30T04:07:03+02:00 Comparison of Valid Ocean Observations Between MODIS Terra and Aqua Over the Global Oceans Feng, Lian Hu, Chuanmin 2016-03-01T08:00:00Z https://digitalcommons.usf.edu/msc_facpub/1995 https://doi.org/10.1109/TGRS.2015.2483500 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1995 doi:10.1109/TGRS.2015.2483500 https://doi.org/10.1109/TGRS.2015.2483500 Marine Science Faculty Publications MODIS Clouds Sea measurements Satellites Sun Ocean temperature Life Sciences article 2016 ftusouthflorida https://doi.org/10.1109/TGRS.2015.2483500 2023-07-13T21:02:47Z Ocean color satellite missions to measure the biophysical and geochemical properties of the surface ocean need to consider not only the spectral and spatial requirements of the sensors but also the satellite overpass time to maximize valid observations. The valid observations are impacted not only by cloud cover but also by other perturbations such as sun glint and stray light. Using Level-3 global composites of three ocean products (chlorophyll a or Chl-a, normalized florescence line height or nFLH, and sea surface temperature or SST), the daily percentage valid observations (DPVOs) over the global oceans were calculated, from which the differences between MODIS Aqua (afternoon pass) and MODIS Terra (morning pass) have been analyzed. For all three products, Aqua shows more valid observations than Terra over the Southern Ocean, the ocean near Peru and Chile, and the ocean around Angola and Namibia, with relatively >30% more valid observations in boreal winter months due to lower cloud coverage in the afternoon. In contrast, more than 20% of valid Chl-a and nFLH observations are obtained by Terra in the North Indian Ocean, and 10%-30% more valid observations by Terra are also found for the Equatorial Pacific and Atlantic oceans. These can be possibly linked to the lower presence of sun glint for Terra. Compared with Chl-a and nFLH, SST retrievals are more tolerant to sun glint and other perturbation factors, leading to much higher DPVOs. The implications of these findings to future satellite mission design and field campaigns are also discussed. Article in Journal/Newspaper Southern Ocean University of South Florida St. Petersburg: Digital USFSP Indian Pacific Southern Ocean IEEE Transactions on Geoscience and Remote Sensing 54 3 1575 1585 |
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Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
MODIS Clouds Sea measurements Satellites Sun Ocean temperature Life Sciences |
spellingShingle |
MODIS Clouds Sea measurements Satellites Sun Ocean temperature Life Sciences Feng, Lian Hu, Chuanmin Comparison of Valid Ocean Observations Between MODIS Terra and Aqua Over the Global Oceans |
topic_facet |
MODIS Clouds Sea measurements Satellites Sun Ocean temperature Life Sciences |
description |
Ocean color satellite missions to measure the biophysical and geochemical properties of the surface ocean need to consider not only the spectral and spatial requirements of the sensors but also the satellite overpass time to maximize valid observations. The valid observations are impacted not only by cloud cover but also by other perturbations such as sun glint and stray light. Using Level-3 global composites of three ocean products (chlorophyll a or Chl-a, normalized florescence line height or nFLH, and sea surface temperature or SST), the daily percentage valid observations (DPVOs) over the global oceans were calculated, from which the differences between MODIS Aqua (afternoon pass) and MODIS Terra (morning pass) have been analyzed. For all three products, Aqua shows more valid observations than Terra over the Southern Ocean, the ocean near Peru and Chile, and the ocean around Angola and Namibia, with relatively >30% more valid observations in boreal winter months due to lower cloud coverage in the afternoon. In contrast, more than 20% of valid Chl-a and nFLH observations are obtained by Terra in the North Indian Ocean, and 10%-30% more valid observations by Terra are also found for the Equatorial Pacific and Atlantic oceans. These can be possibly linked to the lower presence of sun glint for Terra. Compared with Chl-a and nFLH, SST retrievals are more tolerant to sun glint and other perturbation factors, leading to much higher DPVOs. The implications of these findings to future satellite mission design and field campaigns are also discussed. |
format |
Article in Journal/Newspaper |
author |
Feng, Lian Hu, Chuanmin |
author_facet |
Feng, Lian Hu, Chuanmin |
author_sort |
Feng, Lian |
title |
Comparison of Valid Ocean Observations Between MODIS Terra and Aqua Over the Global Oceans |
title_short |
Comparison of Valid Ocean Observations Between MODIS Terra and Aqua Over the Global Oceans |
title_full |
Comparison of Valid Ocean Observations Between MODIS Terra and Aqua Over the Global Oceans |
title_fullStr |
Comparison of Valid Ocean Observations Between MODIS Terra and Aqua Over the Global Oceans |
title_full_unstemmed |
Comparison of Valid Ocean Observations Between MODIS Terra and Aqua Over the Global Oceans |
title_sort |
comparison of valid ocean observations between modis terra and aqua over the global oceans |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2016 |
url |
https://digitalcommons.usf.edu/msc_facpub/1995 https://doi.org/10.1109/TGRS.2015.2483500 |
geographic |
Indian Pacific Southern Ocean |
geographic_facet |
Indian Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/1995 doi:10.1109/TGRS.2015.2483500 https://doi.org/10.1109/TGRS.2015.2483500 |
op_doi |
https://doi.org/10.1109/TGRS.2015.2483500 |
container_title |
IEEE Transactions on Geoscience and Remote Sensing |
container_volume |
54 |
container_issue |
3 |
container_start_page |
1575 |
op_container_end_page |
1585 |
_version_ |
1772820142238990336 |