Presentation on theme: "Www.gfoi.org SDCG-6 Oslo, Norway October 22-24, 2014 SDCG/USGS: Landsat 7 & 8 SDCG-6 Session 5: Roles and Responsibilities Data flows from CEOS agencies."— Presentation transcript:
SDCG-6 Oslo, Norway October 22-24, 2014 SDCG/USGS: Landsat 7 & 8 SDCG-6 Session 5: Roles and Responsibilities Data flows from CEOS agencies E. Fosnight (USGS)
SDCG-6 Oslo, Norway October 22-24, 2014 Landsat acquisition and delivery Acquisition through with a global long term acquisition plan Special requests are expected if priority increase is needed Data access – EarthExplorer/GloVIS – standing requests – Bulk Data Download – Machine-to-machine interfaces Derived data products
SDCG-6 Oslo, Norway October 22-24, 2014 Landsat 8 Daily Limit Investigation During the 2014 Northern Hemisphere Growing Season the daily imaging rate was gradually increased to establish upper bounds and an optimal daily imaging rate – Increased from 550 to 725 and held at 725 for 4+ cycles – Cloud cover prediction threshold was removed – Most day-lit descending land scenes with less than 50% side lap imaged (low latitudes) – Cloud avoidance to select best images for scenes with more than 50% side lap (high latitudes) Images scheduled for descending day-lit land images High latitude11,616 (21.4%)15,426 (28.4%)19,471 (35.8%) Low latitude25,914 (82.8%)29,584 (94.2%)30,913 (98.4%)
SDCG-6 Oslo, Norway October 22-24, , 650 and 725 models
SDCG-6 Oslo, Norway October 22-24, 2014 Data Access through EarthExplorer All data (1972-present) in the Landsat Archive are available for no cost – Newer data are held in a on-line cache – All other data is processed on demand – Landsat is moving to a combination of disk and tape to hold all data on either a fast or slow media Reprocessing to maintain data quality as background activitiy
SDCG-6 Oslo, Norway October 22-24, 2014 Data Access through EarthExplorer Access to data by – Demand – Bulk data download – Machine-to Machine Interface Once baseline data are acquire, database can be kept current with a subscription service to new data as they are acquired.
SDCG-6 Oslo, Norway October 22-24, 2014 CDR & ECV: Definitions Climate data record (CDR) – A time series of measurements of sufficient length, consistency, and continuity to determine climate variability and change. Consistency in processing and reprocessing over years and decades is an essential requirement. Essential climate variable (ECV) – Measurements that are technically and economically feasible for systematic observation. Variables that are currently feasible for global implementation for the Global Climate Observing System (GCOS), and have high impact on the UNFCCC and IPCC requirements.
SDCG-6 Oslo, Norway October 22-24, 2014 CDR and ECV: Goals Provide continuity of observations and measurements to support modeling and decision- making Construct long term data records to establish historical trends and enable future projections Remove the burden of processing from the end user Enable scientific assessments of land surface change – terrestrial monitoring
SDCG-6 Oslo, Norway October 22-24, 2014 Prescriptive Levels of Processing Scaled DNs TOA Reflectance Surface Reflectance Provide users with the product most suitable to their needs On-demand surface reflectance products are available through Earth Explorer
SDCG-6 Oslo, Norway October 22-24, 2014 Aerosol Optical Thickness
SDCG-6 Oslo, Norway October 22-24, 2014 ETM+ and OLI Surface Reflectance
SDCG-6 Oslo, Norway October 22-24, 2014 TM Surface Temperature July 2, 2011
SDCG-6 Oslo, Norway October 22-24, 2014 CDR & ECV Development Schedule CDR/ECVTarget ProvisionalTarget Public Release Surface Reflectance2011 March2012 October Land Surface Temperature2015 June2015 December Burned Area2014 December2015 June Surface Water Extent2014 December2015 June Snow Covered Area2015 August2015 December Biomass2015 September2016 June Criteria for Public Release Algorithms published in peer reviewed journal Methods for validation published in peer reviewed journal Stakeholder engagement in product evaluation and feedback Uncertainties are acceptable but need to be characterized, quantified, and documented
SDCG-6 Oslo, Norway October 22-24, 2014 NASA MEaSUREs Web-Enabled Landsat Data (WELD) Global Forest Cover Change (GFCC) Global Cropland Area Database (GCAD) NASADEM – SRTM PLUS (30 meter) release will follow – NASADEM (30 meter) release in early 2017 with preliminary release in with GDEM V3 fill Future Landsat/Sentinel-2 proposals
SDCG-6 Oslo, Norway October 22-24, 2014 Landsat Future… data model => information model Land Change Monitoring, Assessment and Projection (LCMAP) – Per pixel, tiled, data cube Partnership with Australia Partnership with ESA/NASA – host copy of Sentinel-2 – Derived products – LCMAP