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Advancing Earth Observation Satellites: CEOS Work Plan and MRI Context

This session provides a summary of current work, definitions, and discussions related to the CEOS Work Plan. It also explores the way forward for the MRI activity, including landsat and S2, as well as the assessment of CARD4L and harmonized products. The session covers topics such as terminology, reference datasets, methods, algorithms, and interoperability. The discussion points focus on maintaining objectives, freezing VC-36, and extending dates on VC-30.

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Advancing Earth Observation Satellites: CEOS Work Plan and MRI Context

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  1. Session 6 - MRILSI-VC-6 Committee on Earth Observation Satellites

  2. CEOS Work Plan Context • Summary of current work • Defintions/Terminology • Discussion points • Way forward • Summary

  3. Updates summarised later • CEOS Work Plan Context • Place holder for the MRI activity

  4. Landsat - S2 • Parallel CARD4L self-assessment underway on Landsat and S2 • Joint USGS/NASA – ESA WG on Landsat/S2 ARD products • HLS – US led Landsat/S2 harmonised products (presented during joint meeting) • Sen2Like – ESA led Landsat/S2 harmonised products (presented during joint meeting) Feedback from Satellite Interoperability Workshop: In this category of products, need to carry test harmonisation approaches with private datasets • Summary of current work

  5. Some focus areas • Terminology/Definitions – Including ARD, Interoperability, harmonized products • Common reference datasets • Global DEM (Copernicus procurement update provided by ESA) • USGS adoption of S2 GRI into the next Landsat collection • Methods/Algorithms • Pixel reference orientation (upper left vs. center of pixel) • Geometric issues for product interoperability • Atmospheric correction issues of product interoperability • Comparing ESA MSI ARD and USGS Landsat ARD specifications • Joint USGS/NASA – ESA WG on Landsat/S2 ARD products

  6. Term: Analysis Ready Data • Two ARDs defined: “data ARD” and “information ARD” these ARDs are data that have undergone some level of processing which is sufficient to enable these data to be used for a certain application • Raw data acquired by a sensor and processed into a form that can be used directly without the need for further processing to be applied by users • Minimum processing required to obtain an ARD is that the data/information be geolocalised, i.e. the data/information must be projected to a ‘recognized’ cartographic standard with a characterized accuracy • Terminology/Definitions

  7. Term: CEOS ARD for Land • Well defined term (http://www.ceos.org/ard/#slide3) Term:Interoperable data sources and products “interoperable data source” • must provide a minimum set of metadata describing their • geographical acquisition characteristics • temporal acquisition characteristics • Sensor characteristics • These metadata allow data from different sensors to be ingested into common tools and superimposed, compared and generally worked with “interoperable product” • As above • Terminology/Definitions

  8. Term:Interoperable data sources and products “interoperable product” • As “interoperable data source” plus • processed to a readily known cartographic standard, • radiometricallycorrected to a state of calibrated radiance or reflectance Term:Harmonised products • specific type of interoperable products combining data from different sources that are processed to provide a single time-series stack of information layers • Each layer of this time series stack can be used indifferently, that is without reference to the sensor with which it was acquired • Terminology/Definitions

  9. Need/desire/motivation for MRI context going forward? “develop the long-term plans and actions for MRI, as well as identifying any expansion of MRI to other sensors. Specifically … moderate resolution SAR” • Lead/resources? • Realistic aspirations? • MRI Discussion points

  10. Maintain MRI objectives in the definition of generic free and open reference datasets (eg. Common geometry – DEM, reference image) • Freeze VC-36? • Retain/extend dates on VC-30? • Way forward

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