NASAS NPP LAND EARTH SCIENCE DATA RECORDS EVALUATION FACILITY LPEATE

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NASAS NPP LAND EARTH SCIENCE DATA RECORDS
EVALUATION FACILITY (LPEATE)
A COLLABORATION WITH NASAS DIRECT READOUT
LABORATORY

• NPP Science Data Segment
• NASA Goddard Space Flight Center

Alice Isaacman, SAIC
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THE NPP LAND PEATE

• NPOESS Preparatory Project (NPP) satellite
  scheduled to launch June 2010
• NPP Science Data Segment (SDS) is based at
  Goddard Space Flight Center research arm for
  evaluation of products and algorithm improvement
• Land PEATE Land Project Evaluation and Test
  Element -- scientific evaluation of land data
  products of the Visible Infrared
  Imager/Radiometer Suite (VIIRS)

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LAND PEATE MAJOR OBJECTIVES

• Facilitate evaluation of VIIRS land data products
• Quality assessment
• Statistical analysis
• Comparison to MODIS and AVHRR
• Integrate, test, and evaluate Land Science Team
  modifications to VIIRS land product algorithms
• Disseminate data and analyses to the Land Science
  team.

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Land PEATE Context Diagram
xDRs, IPs and ancillary data (if unavailable
from SD3E)
xDRs, IPs and ancillary data
Management direction
Ancillary data
Algorithm updates
Processing requests
Algorithm updates
MODIS products
Test results
SDR evaluation results, algorithm updates
Pre-flight algorithms, data and information
Processing requests
SPA Validation
Algorithms data
Algorithm updates
xDR evaluation results, algorithm updates
Processing requests
Data Tools
Known issues, algorithms data
Ported Algorithm Code
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Land PEATE Context Diagram
xDRs, IPs and ancillary data (if unavailable
from SD3E)
xDRs, IPs and ancillary data
Management direction
Ancillary data
Algorithm updates
Processing requests
Algorithm updates
MODIS products
Test results
Data Tools
SDR evaluation results, algorithm updates
Pre-flight algorithms, data and information
Processing requests
SPA Validation
Algorithms data
Algorithm updates
xDR evaluation results, algorithm updates
Ported Algorithm
Processing requests
Code
Known issues, algorithms data
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The DRL and Land PEATEs Efforts Support the DB
Community

• Provide VIIRS RDR, SDR, and EDR algorithms that
  function in a direct readout processing
  environment
• Via the DB portal (http//directreadout.sci.gsfc.n
  asa.gov)
• Assess the utility of using global algorithms on
  a regional area in real-time
• Validate Direct Readout Science Processing
  Algorithms (SPAs)

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LPEATE DATA PROCESSING SYSTEM

• CODE SOURCE NPP VIIRS Operational code
• Scientific algorithms converted to C
• Designed to run on IBM AIX machines (bigEndian)
• Input and output data sets are maintained in
  dynamic memory
• Written output is in HDF5 format
• Large amounts of code devoted to an overarching
  memory/data flow control structure

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LAND PEATE DATA PROCESSING SYSTEM

• Land PEATE Adaptations to Operational Code
• Adapted to Linux and MODAPS environments
• Ported to Linux (littleEndian) systems
• Standalone module operation
• Code ported so that input and output (including
  intermediate products) are physical data sets
• Input and output written in HDF4-EOS format
• HDF5 input aggregated and converted to HDF4
• Output can be converted to HDF5

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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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LAND PEATE OPS CODE PORT
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March 2008 LAND PEATE PROCESSING
LEVEL 2 PRODUCTS
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March 2008 LPEATE L2 PROCESSING
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE L2 PROCESSING
MODAPS ARCHIVE PROXY SDRS GRIB FILES GLOBAL
GRIDDED DATA
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March 2008 LPEATE PROCESSING
DIAGNOSTIC DATA RECORDS
DAILY LEVEL 3 PRODUCTS

• FIRE MASK
• LAND SURFACE REFLECTANCE
• EVI AND NDVI
• SNOW COVER
• LAND SURFACE TEMPERATURE
• SEA ICE

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LPEATE LEVEL 1 2 HDF5-gt4 AGGREGATOR

• CONVERTS IDPS-FORMATTED HDF5 PRODUCTS TO HDF4
  PRODUCTS
• ASSEMBLES MULTIPLE BANDS AND/OR TIME SEGMENTS
  INTO ONE PACKAGE
• CURRENTLY OPERATES ON MODERATE AND IMAGERY SDRS
  AND GEOLOCATION
• EASILY EXTENDED TO ANY NPOESS L1/L2 PRODUCT (ALL
  LAND PRODUCTS COMING FROM LPEATE!)
• WILL BE EXPANDED TO GRIDDED PRODUCTS

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LPEATE LEVEL 1 2 HDF5-gt4 AGGREGATOR
IDPS 48-SCAN SINGLE-BAND HDF5 PRODUCTS
AGGREGATED HDF4 APPROXIMATE 5-MINUTE GRANULES
MODERATE RES. SDR BAND M2
MODERATE RES. SDR BAND M15
MODERATE RES. SDR BAND M16
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LPEATE EVALUATION CYCLE
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Algorithm Comparison (1/2)
August 10, 2002 1245GMT Namibia
EXAMPLE 1 SURFACE REFLECTANCE OUTPUT
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Algorithm Comparison (2/2)
NPP Build 1.4
MODIS Aqua C5
Land Surface Reflectance (2002/222 1940)
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Algorithm Comparison (2/2)
NPP Build 1.4
MODIS Aqua C5
MOST SLIGHT DIFFERENCES ARE TO BE EXPECTED.
Land Surface Reflectance (2002/222 1940)
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Algorithm Comparison (2/2)
NPP Build 1.4
MODIS Aqua C5
MOST SLIGHT DIFFERENCES ARE TO BE EXPECTED.
UNREALISTIC VALUES DUE TO OVERCORRECTION
Land Surface Reflectance (2002/222 1940)
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CURRENT AND PROJECTED CAPABILITIES
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CURRENT AND PROJECTED CAPABILITIES
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SUMMARY

• We are leveraging our MODIS Land experience to
  build a flexible, scaleable processing system
  which will aid the NASA SDS Land Science Team in
  evaluation of VIIRS Land EDRs.
• We are collaborating with the DRL to supply the
  DB community with
• Validated VIIRS Land SPAs
• Mature SPA processing modules, techniques, and
  methodologies, including
• Swath-based processing
• Mission-compliant data formats
• Packaging of Land SPAs (e.g. handling anc/aux
  data files and IPs for real-time applications)

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LAND PEATE CONTACT LIST