CEOS ANALYSIS READY DATA


CEOS Analysis Ready Data for Land (CARD4L) are satellite data that have been processed to a minimum set of requirements and organized into a form that allows immediate analysis with a minimum of additional user effort and interoperability both through time and with other datasets.

CARD4L Framework


Many satellite data users lack the expertise, infrastructure and internet bandwidth to efficiently and effectively access, preprocess, and utilize the growing volume of space-based data for local, regional, and national decision-making. Furthermore, even sophisticated users of EO data typically invest a large proportion of their effort into data preparation. This is a major barrier to full and successful utilization of space-based data, and threatens the success of major global and regional initiatives supported by the Committee on Earth Observation Satellites (CEOS). As data volumes grow, this barrier is becoming more significant for all users.

Countries and international organizations have expressed a desire for support from CEOS to facilitate access to and processing of satellite data into CEOS Analysis Ready Data for Land (CARD4L) products. Systematic and regular provision of CARD4L will greatly reduce the burden on global satellite data users.

The CARD4L Framework has three components:

Definition


The definition of CARD4L is not exclusive or prescriptive. The definition of CARD4L reflects the attributes of fundamental measurement products for the majority of global remote sensing users with land imaging applications, and are the minimum level required to support time series analysis and data interoperability.

Definition >>

Product Family Specs


Detail specific 'Threshold' and 'Breakthrough' requirements for:

– General Metadata
– Quality Metadata
– Measurement Calibration
– Geometric Calibration

PFS >>

Product Assessments


Assess how well the specific product complies with each of the metadata and calibration criteria in the Product Family Specification. Includes a description of ‘how’ it complies.

Product Family Specifications


Surface Reflectance


Data collected with multispectral sensors operating in the VIS/NIR/SWIR wavelengths. These typically operate with ground sample distance and resolution in the order 10-100m however the Specification is not inherently limited to this resolution.

Read Product Family Specification >>

Surface Temperature


Data collected with multispectral sensors operating in the thermal infra-red (TIR) wavelengths. These typically operate with ground sample distance and resolution in the order 10-100m.


Read Product Family Specification >>

Radar Backscatter


Data collected by Synthetic Aperture Radar (SAR) sensors.





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The CEOS Land Surface Imaging Virtual Constellation (LSI-VC) served as the forum for developing the CEOS Analysis-Ready Data definition. CARD4L underpins a large amount of the future data architectures work being progressed within CEOS. The CARD4L definition was endorsed by the CEOS Plenary in 2016.