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Papers by Reinold Pasterkamp

Esa Special Publication, 2003

MERIS User Workshop, 2004

Three field cruises were performed in 2002 for the validation of the geophysical ocean colour pro... more Three field cruises were performed in 2002 for the validation of the geophysical ocean colour products of the MERIS sensor on board ENVISAT. At each cruise four stations were visited, where one of the stations was optimised to coincide with a MERIS overpass. Cloud-free sky conditions were realized during two cruises in April and September. For the cruise of 2 September 2002 a level-2 MERIS image was received and the geophysical products were compared with the in situ measured parameters. Two stations were measured within 1 hour of the MERIS overpass (1 and 50 minutes difference). The reflectance and suspended sediment concentration retrieved from the MERIS image were reasonably consistent with in situ observations. The MERIS algal pigment 2 was significantly higher and the yellow substance absorption was significantly lower than the in situ observations. Only two match-up pixels are presented in this paper, so no statistically sound conclusive remarks can be made about the validatio...

In the Netherlands, on-going operational processing of SeaWiFS imagery has resulted in a time-ser... more In the Netherlands, on-going operational processing of SeaWiFS imagery has resulted in a time-series of images of total suspended matter concentration (TSM) in the North Sea of 1999 and 2000. The used TSM algorithm provides reliable results for this case II water, which is dominated by sediment from various sources. However, the algorithm tends to seriously overestimate TSM concentrations in

This paper reports on the validation activities for 2002 and 2003, providing so called 'match... more This paper reports on the validation activities for 2002 and 2003, providing so called 'matchup' data (near simultaneous ground-truth sampling and satellite overpass) and Level 2 validation analysis. For the 2 matchup locations presented in 2002, a comparison is made for the atmospheric correction before and after the changes in atmospheric correction. Furthermore the influence of the case2_S flag on the MERIS level 2 water products was investigated. First, it was found that the reflectance from the new '0308' processing was significantly lower than the 'original' processing. This effect is most pronounced in the blue, where the difference is approximately 0.005. The 'original' reflectance spectrum compares best to the measured in situ reflectance spectrum. Second, the number of matchup locations sampled by our institute increased to a number of 7 due to continued participation in cruises in 2003. Disappointingly, validation of concentrations of chlor...

Remote Sensing and Digital Image Processing, 2002

MERIS User Workshop, 2004

Remote Sensing of Environment, 2008

Three field cruises were performed in 2002 for the validation of the geophysical ocean colour pro... more Three field cruises were performed in 2002 for the validation of the geophysical ocean colour products of the MERIS sensor on board ENVISAT. At each cruise four stations were visited, where one of the stations was optimised to coincide with a MERIS overpass. Cloud-free sky conditions were realized during two cruises in April and September. For the cruise of 2 September 2002 a level-2 MERIS image was received and the geophysical products were compared with the in situ measured parameters. Two stations were measured within 1 hour of the MERIS overpass (1 and 50 minutes difference). The reflectance and suspended sediment concentration retrieved from the MERIS image were reasonably consistent with in situ observations. The MERIS algal pigment 2 was significantly higher and the yellow substance absorption was significantly lower than the in situ observations. Only two match-up pixels are presented in this paper, so no statistically sound conclusive remarks can be made about the validatio...

Esa Special Publication, 2003

MERIS User Workshop, 2004

Three field cruises were performed in 2002 for the validation of the geophysical ocean colour pro... more Three field cruises were performed in 2002 for the validation of the geophysical ocean colour products of the MERIS sensor on board ENVISAT. At each cruise four stations were visited, where one of the stations was optimised to coincide with a MERIS overpass. Cloud-free sky conditions were realized during two cruises in April and September. For the cruise of 2 September 2002 a level-2 MERIS image was received and the geophysical products were compared with the in situ measured parameters. Two stations were measured within 1 hour of the MERIS overpass (1 and 50 minutes difference). The reflectance and suspended sediment concentration retrieved from the MERIS image were reasonably consistent with in situ observations. The MERIS algal pigment 2 was significantly higher and the yellow substance absorption was significantly lower than the in situ observations. Only two match-up pixels are presented in this paper, so no statistically sound conclusive remarks can be made about the validatio...

In the Netherlands, on-going operational processing of SeaWiFS imagery has resulted in a time-ser... more In the Netherlands, on-going operational processing of SeaWiFS imagery has resulted in a time-series of images of total suspended matter concentration (TSM) in the North Sea of 1999 and 2000. The used TSM algorithm provides reliable results for this case II water, which is dominated by sediment from various sources. However, the algorithm tends to seriously overestimate TSM concentrations in

This paper reports on the validation activities for 2002 and 2003, providing so called 'match... more This paper reports on the validation activities for 2002 and 2003, providing so called 'matchup' data (near simultaneous ground-truth sampling and satellite overpass) and Level 2 validation analysis. For the 2 matchup locations presented in 2002, a comparison is made for the atmospheric correction before and after the changes in atmospheric correction. Furthermore the influence of the case2_S flag on the MERIS level 2 water products was investigated. First, it was found that the reflectance from the new '0308' processing was significantly lower than the 'original' processing. This effect is most pronounced in the blue, where the difference is approximately 0.005. The 'original' reflectance spectrum compares best to the measured in situ reflectance spectrum. Second, the number of matchup locations sampled by our institute increased to a number of 7 due to continued participation in cruises in 2003. Disappointingly, validation of concentrations of chlor...

Remote Sensing and Digital Image Processing, 2002

MERIS User Workshop, 2004

Remote Sensing of Environment, 2008

Three field cruises were performed in 2002 for the validation of the geophysical ocean colour pro... more Three field cruises were performed in 2002 for the validation of the geophysical ocean colour products of the MERIS sensor on board ENVISAT. At each cruise four stations were visited, where one of the stations was optimised to coincide with a MERIS overpass. Cloud-free sky conditions were realized during two cruises in April and September. For the cruise of 2 September 2002 a level-2 MERIS image was received and the geophysical products were compared with the in situ measured parameters. Two stations were measured within 1 hour of the MERIS overpass (1 and 50 minutes difference). The reflectance and suspended sediment concentration retrieved from the MERIS image were reasonably consistent with in situ observations. The MERIS algal pigment 2 was significantly higher and the yellow substance absorption was significantly lower than the in situ observations. Only two match-up pixels are presented in this paper, so no statistically sound conclusive remarks can be made about the validatio...

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