[2024]Digital Global Overview Report 2024 Meltwater.pdf
IGARSS 2011_Priestley.ppt
1. CERES Flight Model 5 on NPP : Pre-Launch Performance and Sensor Data Record Validation Kory Priestley 1 G. Louis Smith 1 , Susan Thomas 1 , Herbert Bitting 2 1 NASA Langley Research Center, 2 Northrop Grumman Aerospace Systems IGARSS 2011 Vancouver, British Columbia July 29, 2011
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3. Earth Radiation Budget Components Kiehl & Trenberth 1997 CERES CERES TSIS Top of Atmosphere
9. Why is CERES Climate Quality Calibration so difficult? A question of time scales, experience and balancing accuracy with providing data products to the community. - Calibrated Radiances have been released on ~6 month centers - 6 months is just a blink of an eye when analyzing decadal trends… Same time scale as phenomena which influence instrument response - Beta Angle - Earth Sun Distance - Orbital shifts - Instrument Operational modes (e.g. RAPS vs. Xtrack) Design weaknesses and anticipated failures in onboard calibration hardware - full spectral range of observations not covered by cal subsystems Complicates separation of instrument ‘artifacts’ from natural variability.
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13. CERES FM-5 Pre-Launch Calibration Pre-launch Calibrations were performed with TRW’s Radiometric Calibration Facility (RCF). Four separate pre-launch calibration campaigns have been performed on the CERES FM5 instrument after it was fabricated. March 1999 February 2000 October 2006 Sept. –Oct. 2008 Completed hot acceptance tests. During cold acceptance testing, calibration was stopped due to carousel problems. Tests done in hot and cold acceptance temperatures. Calibration tests done only in hot acceptance temperatures. Full calibration tests in hot and cold acceptance temperatures. 14 days 9 days 11 days 33 days
21. SDR Product Release Strategy Edition1_CV - Static Algorithms and coefficients - baseline product used in cal/val protocol (L+6 Months, continuous throughout mission) Edition2 - Utilizes temporally varying coefficients to correct for traceable radiometric drift. All spectral changes are broadband and ‘gray’. (L+1 yrs to ~5 yrs) Edition3 - Will incorporate temporally varying spectral artifacts in the SW measurements. A complete re-analysis of Ground Calibration with additional component characterization measurements. (L+5 yrs) User Applied Revisions - Advance capabilities to the users prior to the release of the next Edition. Edition2 products lag Edition1_CV by a minimum of 4 months
Global maps of the energy leaving the earth system on various temporal and spatial scales.
Data coming from the satellite is retrieved by C3S and is run the IDPS who then sends to the SDS. Note SDS is not an NPOESS feature. Provide Land PEATE sub-sampling software for aggregated VIIRS SDRs (Science) Acknowledge data from SDS Land PEATE (ASDC) Ingest data from SDS Land PEATE & other sources (ASDC) Produce, archive, distribute data products (ASDC) Report status of collection (ASDC) Support user access to collection (ASDC)