Gridding artifacts on ENVISAT/MERIS temporal series

L. Gómez Chova; R. Zurita-Milla; L. Alonso; L. Guanter; J. Amoros-Lopez; G. Camps-Valls; J. Moreno

Gridding artifacts on ENVISAT/MERIS temporal series

L. Gómez Chova, R. Zurita-Milla, L. Alonso, L. Guanter, J. Amoros-Lopez, G. Camps-Valls, J. Moreno

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

Earth observation satellites are a valuable source of data that can be used to better understand the Earth system dynamics. However, analysis of satellite image time series requires an accurate spatial co-registration so that the multi-temporal pixel entities offer a true temporal view of the study area. This implies that all the observations must be mapped to a common system of grid cells (gridding).
Two common grids can be defined as a reference: (1) a grid defined by an external dataset in a given coordinate system or (2) a grid defined by one of the images of the time series. The aim of this paper is to study the impact that gridding has on the quality of ENVISAT/MERIS image time series, which is quantified using a time series of images acquired over The Netherlands. First, the impact of the reference map grid selection is evaluated in terms of geolocation errors and pixel overlap. Then, the effect of observation geometry (due to the fact that images are acquired from slightly different orbits) is studied. Results show that it is of paramount importance to identify areas with small pixel overlap in order to further analyze the reliability of the products derived from these areas.

Original language	English
Title of host publication	Proceedings of ESA Living Planet Symposium, 28 June-2 July 2010, Bergen, Norway
Editors	H. Lacoste-Francis
Publisher	European Space Agency (ESA)
Number of pages	8
ISBN (Print)	978-92-9221-250-6
Publication status	Published - 2010
Event	ESA Living Planet Symposium 2010 - Bergen, Norway Duration: 28 Jun 2010 → 2 Jul 2010

Publication series

Name	ESA Spacebooks
Publisher	ESA
Number	SP-686

Conference

Conference	ESA Living Planet Symposium 2010
Country/Territory	Norway
City	Bergen
Period	28/06/10 → 2/07/10

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@inproceedings{4421eaed18394532bed231a90b1626d7,

title = "Gridding artifacts on ENVISAT/MERIS temporal series",

abstract = "Earth observation satellites are a valuable source of data that can be used to better understand the Earth system dynamics. However, analysis of satellite image time series requires an accurate spatial co-registration so that the multi-temporal pixel entities offer a true temporal view of the study area. This implies that all the observations must be mapped to a common system of grid cells (gridding).Two common grids can be defined as a reference: (1) a grid defined by an external dataset in a given coordinate system or (2) a grid defined by one of the images of the time series. The aim of this paper is to study the impact that gridding has on the quality of ENVISAT/MERIS image time series, which is quantified using a time series of images acquired over The Netherlands. First, the impact of the reference map grid selection is evaluated in terms of geolocation errors and pixel overlap. Then, the effect of observation geometry (due to the fact that images are acquired from slightly different orbits) is studied. Results show that it is of paramount importance to identify areas with small pixel overlap in order to further analyze the reliability of the products derived from these areas.",

author = "{G{\'o}mez Chova}, L. and R. Zurita-Milla and L. Alonso and L. Guanter and J. Amoros-Lopez and G. Camps-Valls and J. Moreno",

year = "2010",

language = "English",

isbn = "978-92-9221-250-6",

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publisher = "European Space Agency (ESA)",

number = "SP-686",

editor = "H. Lacoste-Francis",

booktitle = "Proceedings of ESA Living Planet Symposium, 28 June-2 July 2010, Bergen, Norway",

note = "ESA Living Planet Symposium 2010 ; Conference date: 28-06-2010 Through 02-07-2010",

}

Gómez Chova, L, Zurita-Milla, R, Alonso, L, Guanter, L, Amoros-Lopez, J, Camps-Valls, G & Moreno, J 2010, Gridding artifacts on ENVISAT/MERIS temporal series. in H Lacoste-Francis (ed.), Proceedings of ESA Living Planet Symposium, 28 June-2 July 2010, Bergen, Norway. ESA Spacebooks, no. SP-686, European Space Agency (ESA), ESA Living Planet Symposium 2010, Bergen, Norway, 28/06/10.

Gridding artifacts on ENVISAT/MERIS temporal series. / Gómez Chova, L.; Zurita-Milla, R.; Alonso, L. et al.

Proceedings of ESA Living Planet Symposium, 28 June-2 July 2010, Bergen, Norway. ed. / H. Lacoste-Francis. European Space Agency (ESA), 2010. (ESA Spacebooks; No. SP-686).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Gridding artifacts on ENVISAT/MERIS temporal series

AU - Gómez Chova, L.

AU - Zurita-Milla, R.

AU - Alonso, L.

AU - Guanter, L.

AU - Amoros-Lopez, J.

AU - Camps-Valls, G.

AU - Moreno, J.

PY - 2010

Y1 - 2010

N2 - Earth observation satellites are a valuable source of data that can be used to better understand the Earth system dynamics. However, analysis of satellite image time series requires an accurate spatial co-registration so that the multi-temporal pixel entities offer a true temporal view of the study area. This implies that all the observations must be mapped to a common system of grid cells (gridding).Two common grids can be defined as a reference: (1) a grid defined by an external dataset in a given coordinate system or (2) a grid defined by one of the images of the time series. The aim of this paper is to study the impact that gridding has on the quality of ENVISAT/MERIS image time series, which is quantified using a time series of images acquired over The Netherlands. First, the impact of the reference map grid selection is evaluated in terms of geolocation errors and pixel overlap. Then, the effect of observation geometry (due to the fact that images are acquired from slightly different orbits) is studied. Results show that it is of paramount importance to identify areas with small pixel overlap in order to further analyze the reliability of the products derived from these areas.

AB - Earth observation satellites are a valuable source of data that can be used to better understand the Earth system dynamics. However, analysis of satellite image time series requires an accurate spatial co-registration so that the multi-temporal pixel entities offer a true temporal view of the study area. This implies that all the observations must be mapped to a common system of grid cells (gridding).Two common grids can be defined as a reference: (1) a grid defined by an external dataset in a given coordinate system or (2) a grid defined by one of the images of the time series. The aim of this paper is to study the impact that gridding has on the quality of ENVISAT/MERIS image time series, which is quantified using a time series of images acquired over The Netherlands. First, the impact of the reference map grid selection is evaluated in terms of geolocation errors and pixel overlap. Then, the effect of observation geometry (due to the fact that images are acquired from slightly different orbits) is studied. Results show that it is of paramount importance to identify areas with small pixel overlap in order to further analyze the reliability of the products derived from these areas.

UR - https://ezproxy2.utwente.nl/login?url=https://webapps.itc.utwente.nl/library/2010/conf/zuritamilla_gri.pdf

M3 - Conference contribution

SN - 978-92-9221-250-6

T3 - ESA Spacebooks

BT - Proceedings of ESA Living Planet Symposium, 28 June-2 July 2010, Bergen, Norway

A2 - Lacoste-Francis, H.

PB - European Space Agency (ESA)

T2 - ESA Living Planet Symposium 2010

Y2 - 28 June 2010 through 2 July 2010

ER -

Gridding artifacts on ENVISAT/MERIS temporal series

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