National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California Sounder PEATE Services for Assessment of CrIMSS xDRs Evan Fishbein JPL/NASA Sounder PEATE Services
National Aeronautics and Overview and Context – NPP Space Administration Jet Propulsion Laboratory NPP Mission Concepts California Institute of Technology Pasadena, California • The National Polar-Orbiting Operational Environmental Satellite System (NPOESS) Preparatory Project (NPP) – Joint Mission involving NASA, NOAA and DOD – Managed jointly by the NPOESS Integrated Program Office (IPO) The NPP mission collects and distributes remotely- • sensed land, ocean, and atmospheric data to the meteorological and global climate change communities – Responsible for transition from existing Earth- New Sensors observing missions to the NPOESS. • NPP provides risk reduction for NPOESS • Visible Infrared Imager Radiometer Suite (VIIRS): Multispectral scanning radiometer with 22 spectral – Provides opportunity to demonstrate and bands validate new instruments and processing • Cross-Track Infrared Sounder (CrIS): Michelson algorithms interferometer with 1305 channels – Demonstrate and validate aspects of the NPOESS • Advanced Technology Microwave Sounder (ATMS): command, control, communications and ground Passive microwave radiometer with 22 channels processing capabilities prior to the launch of the • Ozone Mapping & Profiling Sensor (OMPS): three first NPOESS spacecraft. hyperspectral imaging spectrometers (Nadir Mapper, Nadir Profiler, Limb Profiler) • Clouds and the Earth’s Radiant Energy System (CERES): Radiometer with 3 broadband channels (shortwave, longwave, total) REF Sounder PEATE Services
National Aeronautics and Space Administration Overview and Context – The Science Data Segment Jet Propulsion Laboratory Top Level NPP System Diagram California Institute of Technology Pasadena, California Centrals Naval Oceanographic Office (NAVO) National Environmental Satellite Data and Information Service (NESDIS) Naval Fleet Numerical Meteorological and Oceanographic Center (FNMOC) Air Force Weather Agency (AFWA Sounder PEATE Services
National Aeronautics and Space Administration Product Assessment Teams Jet Propulsion Laboratory California Institute of Technology Pasadena, California • The NGST Cal/Val team (NCVT) supports Requirements Team IT Support assessment, updates and monitoring to ensure NPP/NPOES meet NPOESS Sounder Algorithm Integrated Operational Requirements GRAVITE IORDS Operations (IORD). Team – NSIPS – NPOESS Science Investigator-led Processing System (NGST) NGST NSIPS • SOAT provides advise to IPO, independent IORDS Cal/Val Team assessments and recommendations to assist in meeting requirements – GRAVITE - Government Resource for Algorithm Verification, Independent Test, and Evaluation (IPO) NASA Sounder • NASA Sounder Science Team (NSST) Science Sounder Objectives Science PEATE assesses NPP products for continuing science Team from EOS platforms. – PEATE – Product Evaluation and Test Elements The Sounder Science Team assessments supports NASA science program by addressing impacts of measurement errors on characterizing climate trends, processes and modeling 6/4/2009 EDR Assessment Status - 4 Sounder PEATE Services
National Aeronautics and Space Administration Science Perspective Jet Propulsion Laboratory Roadmap for Obtaining Climate Data California Institute of Technology Pasadena, California • Iterative process of intercomparison and algorithm refinement • Climate studies provide ultimate test of Correlative climate worthiness of data Data Climate Studies • Climate studies include – Trend analysis Data xDRs – Climate characterization and variability Intercomparisons – Process studies • Algorithms evolve to produce data characterizing increasingly subtle Algorithm phenomena Refinement – Data is not suddenly “climate quality” • Goal is to produce data limited by instrument specs, not algorithms The Sounder PEATE provides data, tools and infrastructure for facilitating each process above. Sounder PEATE Services
National Aeronautics and Space Administration Assessment Strategies Jet Propulsion Laboratory California Institute of Technology Pasadena, California NSST, NCVT and SOAT have identified similar assessment strategies • Collect, analysis and summarize calibration data • Offline IDPS and “science” EDR and SDR algorithms testing • Use of “focus days” and intensive inter-comparison periods to reduce data volume • Assessment based on scenes complexity and state-dependent sampling error • Comparisons with correlative data Intercomparisons of observed and calculated radiances (BT) • • Cross-platform comparisons (SNO) • Production of gridded products to facilitate scientific analyses • Derived products (saturation) to improve usability and detect errors Retrieval of trace gases for atmospheric chemistry and improved T,q • 6/4/2009 EDR Assessment Status - 6 Sounder PEATE Services
National Aeronautics and Space Administration Calibration Data Jet Propulsion Laboratory California Institute of Technology Pasadena, California Analyze and provide scientists with tools to interpret observations • Spatial “top hat” functions for characterizing clouds and scene heterogeneity Application of AIRS spatial response functions to MODIS radiances • Spectral Calibration • Radiometric Stability Scanning HIS Validates Rad Accy to 0.2K – AIRS Radiometric Stability <8mK/Y H. Revercomb (UW) H. Aumann (JPL) 6/4/2009 EDR Assessment Status - 7 Sounder PEATE Services
National Aeronautics and Space Administration Scene Selection Jet Propulsion Laboratory California Institute of Technology Gpolygon Maps and Focus Days Pasadena, California • Gpolygon maps – a simple graphical IASI Gpolygon Map display showing: – What data is available, and where it is located • IASI, AIRS and CrIS gpolygon maps aid in identifying regions of coincident observations • Supports campaigns and analyses focused on location or weather AIRS Gpolygon Map • Focus Days – Selection based on orbit repeat cycle of AIRS – NPP orbit is not as controlled as Aqua Platform Repeat Cycle Number of Orbits Aqua 16 days 233 orbits MetOp-A 29 days 423 orbits NPP 16 days 230 orbits Sounder PEATE Services
National Aeronautics and Space Administration Scene Categorization and Subsetting Jet Propulsion Laboratory California Institute of Technology Pasadena, California • Validation involves hierarchy of complicated scenes Partially cloudy Mixed clouds Clear Ocean Land Ocean over ocean over ocean • Implementing CrIS and IASI “calibration” subset processing to identify clear scenes Clear assessment independent of EDR algorithms – – Implementing “clear flag” processing based of radiances to build clear and partially clear scene data sets. • Creation of random footprint data sets to improve assessment of state sampling from focusing on correlative sites, clear scenes or intensive campaign periods and focus days Will collect requirements for ATMS/MHS subset datasets • Implement and add precipitation and cloud liquid water flags – Will collect requirements for subsetting based on cloud type • 6/4/2009 EDR Assessment Status - 9 Sounder PEATE Services
National Aeronautics and EDR Space Administration Jet Propulsion Laboratory Correlative Data Comparisons California Institute of Technology Pasadena, California • Proxy/simulated data • Analysis matchups (ECMWF or GFS) interpolated Proxy/Sim to IASI/AMSU/MHS and CrIMSS footprints Matchups ECMWF/GFS • Operational radiosonde matchups Matchups – Q/C and reformatting required to make this a useful data set Operational Radiosondes – Profiles are aliased by sampling to mandatory levels • Dedicated radiosondes Dedicated Radiosondes Global radiosonde upper-air network (GRUAN) – – ARM-CART sites Field Campaigns – Funding opportunities and data shared TBD. • Field campaigns and aircraft underflight Maturity of Product – Characterize sub pixel variability, trace gases and dust/aerosols – Availability TBD. 6/4/2009 EDR Assessment Status - 10 Sounder PEATE Services
National Aeronautics and Space Administration Comparisons with Correlative Data Jet Propulsion Laboratory Analysis Matchups California Institute of Technology Pasadena, California • Analysis matchup produces “matchup products” by interpolating analysis to footprints • Using ECMWF and NCEP global analyses ECMWF − AIRS temperature statistics • Analysis matchups include • Radiances compared with calculated from analysis state • ECMWF and CrIMSS states comparisons • CrIMSS cloud-cleared radiances and calculated from analysis state • Analysis matchups are used to validate gridding algorithms • Analysis matchups facilitate inter-platform comparisons by reducing spatial-temporal mismatch. ECMWF • Matchup products will interface with RTA packages for clear and cloud-cleared radiance assessments 6/4/2009 EDR Assessment Status - 11 Sounder PEATE Services
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