MODIS and SeaWIFS on-orbit lunar calibration

Sun, Jielun; Eplee, Robert E.; Xiong, X.; Stone, Tom; Meister, Gerhard; McClain, Charles R.

doi:10.1117/12.795338

Cited by 12 publications

(10 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The trends analysis using ocean colour products should take into account how these products have been created. For a series based on one sensor, it therefore means making sure that the series have been created with one processing chain, including a consistent calibration table and calibration history [30,31]. This applies to the Med Regional SeaWiFS RAN-MyOcean and to Global Ocean SeaWiFS RAN-MyOcean.…”

Section: Introductionmentioning

confidence: 99%

The Use of Ocean-Colour Data to Estimate Chl-a Trends in European Seas

Coppini¹,

Lyubarstev²,

Pinardi³

et al. 2013

IJG

View full text Add to dashboard Cite

Ocean-colour remote-sensing products have been used to estimate Chl-a trends in European seas with the aim to develop a new indicator based on ocean-colour data for the European Environment Agency (EEA). The new indicator, called CSI023(+), derived from satellite ocean-colour products from the MyOcean Marine Core Service (www.myocean.eu) has been defined and calculated. In our analysis, we have used 3 MyOcean satellite products: 2 global satellite products (SeaWiFS and a merged product) and one regional (adjusted to specific regional Mediterranean conditions) ocean-colour product. We have evaluated the differences among the 3 different products in estimating Chl-a trends. CSI023(+) complements the EEA CSI023 indicator for eutrophication based on chlorophyll-a (Chl-a) in-situ observations. Analysis has revealed the potential of ocean colour as a CSI023(+) indicator to detect large-scale, and in some cases, even local-scale, changes and decreasing trends of Chl-a were observed throughout the Black Sea, the Eastern Mediterranean, the southern part of the Western Mediterranean, the English Channel and the north part of the North Sea. Large areas with increasing trends were observed in the Bay of Biscay, in the North-East Atlantic regions of Ireland and the UK, in the northern part of the North Sea, in the Kattegat and in the Baltic. Specific analysis has been performed in the Mediterranean coastal areas using regional products to investigate local scale results. Validation of ocean-colour products has been carried out through comparison with observations of the Eionet EEA database. The validation results highlight that regional products produced with regional algorithms are recommended for the future.

show abstract

Section: Introductionmentioning

confidence: 99%

The Use of Ocean-Colour Data to Estimate Chl-a Trends in European Seas

Coppini¹,

Lyubarstev²,

Pinardi³

et al. 2013

IJG

View full text Add to dashboard Cite

show abstract

“…The long term relative stability of CI can be monitored by observing the Moon. 16,17 The SPARC method provides a new approach to absolute vicarious calibration using arrays of convex, spherical reflectors on the Earth's surface. SPARC combines reflectance-based vicarious measurements with methods based on stellar observations by creating an array of "solar stars" on the ground with convex spherical mirrors.…”

Section: Optical Subsystem the CI Optical Subsystem Illustrated Inmentioning

confidence: 99%

Space-based hyperspectral imaging spectroradiometer for coastal studies

et al. 2011

View full text Add to dashboard Cite

Resolving the complexity of coastal and estuarine waters requires high spatial resolution, hyperspectral imaging spectroradiometry. Hyperspectral measurements also provide capability for measuring bathymetry and bottom types in optically shallow water and for detailed cross calibration with other instruments in polar and geosynchronous orbit. This paper reports on recent design studies for a hyperspectral Coastal Imager (CI -pronounced "sea") that measures key data products from sun synchronous orbit. These products include water-leaving radiances in the near-ultraviolet, visible and near-infrared for separation of absorbing and scattering coastal water constituents and for calculation of chlorophyll fluorescence. In addition, CI measures spectral radiances in the near-infrared and shortwave infrared for atmospheric corrections while also measuring cloud radiances without saturation to enable more accurate removal of instrument stray light effects. CI provides contiguous spectral coverage from 380 to 2500 nm at 20 m GIFOV at nadir across 5000+ km 2 scenes with spectral sampling, radiometric sensitivity and calibration performance needed to meet the demanding requirements of coastal imaging. This paper describes the CI design, including concepts of operation for data collection, calibration (radiometric, spectral and spatial), onboard processing and data transmission to Earth. Performance characteristics for the instrument and all major subsystems including the optics, focal plane assemblies, onboard calibration, onboard processing and thermal subsystem are presented along with performance predictions for instrument sensitivity and calibration. Initial estimates of size, mass, power and data rate are presented.

show abstract

“…Lunar calibration is necessary to detrend changes in the instrument response over the course of the mission 15,16,17 . The on-orbit solar diffuser and lunar observations by VIIRS will be made at the same AOI on the HAM.…”

Section: Lunar Calibrationmentioning

confidence: 99%

Assessment of NPP VIIRS ocean color data products: hope and risk

et al. 2011

View full text Add to dashboard Cite

For several years, the NASA/Goddard Space Flight Center (GSFC) NPP VIIRS Ocean Science Team (VOST) provided substantial scientific input to the NPP project regarding the use of Visible Infrared Imaging Radiometer Suite (VIIRS) to create science quality ocean color data products. This work has culminated into an assessment of the NPP project and the VIIRS instrument's capability to produce science quality Ocean Color data products. The VOST concluded that many characteristics were similar to earlier instruments, including SeaWiFS or MODIS Aqua. Though instrument performance and calibration risks do exist, it was concluded that programmatic and algorithm issues dominate concerns.

show abstract

MODIS and SeaWIFS on-orbit lunar calibration

Cited by 12 publications

References 18 publications

The Use of Ocean-Colour Data to Estimate Chl-a Trends in European Seas

The Use of Ocean-Colour Data to Estimate Chl-a Trends in European Seas

Space-based hyperspectral imaging spectroradiometer for coastal studies

Assessment of NPP VIIRS ocean color data products: hope and risk

Contact Info

Product

Resources

About