Post on 26-Aug-2018
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Integrated MetadataModel for Radar Sensors
Integrated MetadataModel for Radar Sensors
Anthony Galassi, ChairMetadata Profile Working GroupMay 2008ISO TC211 Standards in Action Workshop
Anthony Galassi, ChairMetadata Profile Working GroupMay 2008ISO TC211 Standards in Action Workshop
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Agenda
• MPWG • Radar Image Metadata Work• Results and Future Effort• Summary
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• NITFS Technical Board (NTB)• Motion Imagery Standards Board (MISB)• Community Sensor Model Working Group (CSMWG)• GEOINT Reporting Focus Group (RFG)• Geographic Portrayal Focus Group (PFG)• Metadata Focus Group (MFG)• Information Transfer & Services Architecture Focus Group (ITSA)• Application Schemas for Feature Encoding Focus Group (ASFE)
GEOINT Standards Community
Metadata ProfileWorking Group (MPWG)
NITFS TechnicalBoard (NTB)
DoD IT Standards Registry (DISR)
GWG Focus Groups
Community Representation-Subject Matter Experts
Geospatial Intelligence Standards Working GroupChair: Mark DeMulder, NGA/OCIO
DoD/IC Forum for Standardization Activities
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MPWG Goal
The MPWG envisions an enterprise that supports a seamless, unified common operating picture. A community-wide, physics-based, metadata model will result in compatible products across the enterprise for the processes common to multiple sensors. By capturing physics common to multiple sensors, we enable interoperability of components throughout our architectures.
GWG Web Site Link: http://www.gwg.nga.mil/
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S (Sensor)
ACTIVE PASSIVE
Non-Scanning Non-Imaging
Scanning Imaging Non-Scanning Scanning
Imaging
• Microwave Radiometer
• Microwave Altimeter
• Laser Distance Meter
• Image Plane Scanning
Passive Range Array
• Object Plane Scanning
Real Aperture Radar
• Synthetic Aperture Radar
(SAR)
Sensor (Imagery) Geospatial Metadata Levels
Mandatory Metadata
Levels of Metadata
• Cameras
• Microwave Radiometer
(examples not sorted for these purposes)
Diagram adapted from Specific Sensor Geospatial Dataset in NSG Geospatial Core Metadata Profile (NGCMP) for context purposes
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Sources of Remote Sensor Data
SAR
Reflected Solar EnergyReflected Solar Energy Emitted EnergyEmitted Energy
PI (airborne)VNIR
RadarSats
FLIR
Wavelength in Micrometers (μm)
ASARS
Slide created by NGA/IID and NGA/PLMTI – Multi spectral Thermal Imager (DOE)
Target Signatures & Search Cueing
QuickBirdIkonosGeoEye
(Reflective MSI)
MTI
ExtremeInfrared
NearInfrared
MidwaveInfrared
LongwaveInfrared
BandBand
Microwave
50.4 1 1.5 2 3 6 8 12 15
LWIRLWIRSWIRSWIRNIRNIRVisibleVisible MWIRMWIR
0.9
Composite signatures revealmore about a targets behavior
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MPWG Radar Sensor Work• Harmonization of metadata across current
sensor programs• Publish standards that include a data
dictionary of the harmonized metadata • Enable common exploitation environment
– data products, metadata, & tools• Finish Data Model• Finish Schemas
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Processed SAR data(SAR: Synthetic Aperture RADAR)
examples:
detected imagedynamic imagecoherent change detectioncolor multiview
other …
What are SAR Products?
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Radar Metadata Focus
Engineer the Metadata :– from the sensor platform
through the exploitation environment– inherit, augment, delete metadata – maintain correct metadata for every process – result in multiple data products
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How is the SAR Metadata Used?
Signal, ImageProcessing
Down LinkProcessing
SensorsABCDE
ExploitationEnvironment
L2
Product Generation
Using Profile
L1
LibrariesDissemination
L3
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Product Enabling MetadataProduct: Coherent Change Detection (CCD)
INPUT: Level 2 Data - Paired Images:
Image Data: complex compressed
Metadata: collected area, timeazimuth & graze anglesbandwidth, frequency, modulation
OUTPUT: Level 3 Product - CCD:
Image Data: pixel correlation map
Metadata: area & registration pointstime, azimuth, & graze angle deltasintersecting bandwidths
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SAR Metadata ManagementMetadata is inherited, augmented, deleted
through the processing chain
inheriteddeleted
augmented
Level 1 Products
Level 2 Products
Level 3 Products
Final Product Description
Data Source: Sensor, Platform ..
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ephemeris(platform position over time)
generated &
updated
used in IFP geometry
model
used in artifact
processing(shadows,layover)
used in artifact location
comparison
inheriteddeleted
augmented
Sensors L2
L1
L3
Signal, ImageDown Link
ExploitationProduct Generation
SAR Metadata Management
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Signal, ImageDown Link
ExploitationProduct Generation
waveform parameters(transmitted/received signal form)
generated used in detection
processing
Sensors L2
L1
L3
inheriteddeleted
augmented
SAR Metadata Management
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inheriteddeleted
augmented
analog to digital bias(sensor electronics status)
generated used in signal
compensation
Sensors
Signal, ImageDown Link
ExploitationProduct Generation
L2
L1
L3
SAR Metadata Management
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Signal, ImageDown Link
ExploitationProduct Generation
inheriteddeleted
augmented
image vertices(corners of processed data)
generated after IFP
updated for selected
areas
updated for selected targets
Sensors L2
L1
L3
SAR Metadata Management
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Signal, ImageDown Link
ExploitationProduct Generation
inheriteddeleted
augmented
phase correlation(signal changes)
generated for change detection
updated through time
Sensors L2
L1
L3
SAR Metadata Management
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Signal, ImageDown Link
ExploitationProduct Generation
color allocation(phenomenology depiction)
multi-collectionproduct
Sensors L2
L1
L3
inheriteddeleted
augmented
SAR Metadata Management
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Multiple Metadata Formulations
Sensor Metadata Format Specification Document
Sensor1: GrazAngle (degrees)
Sensor2: GA
Sensor3: None
Sensor4: GR (radians)
Sensor-independent:
GrazingAngle (in degrees)
The need for harmonization example:
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Example Schema
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Recent Results
• Common Radar Dictionary of terms• Metadata defined to enable repackaging of
data between levels of data processing• Metadata Model being developed• Profile of Standards for Tools
Profile: subset of metadata for application• Harmonization and mapping to TC211
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Work with other GWG Focus Groups and ISO TC211
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Work with other GWG Focus Groups and ISO TC211
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Enterprise Metadata Requirements
• Archival/Retrieval/Discovery
• Distribution
• Display
• Mensuration
• Product Generation
• Quality Metrics
• Exploration
The MPWG, as a sub-group of the GWG, supports the NSG in its challenge to provide common geospatial services within a Service Oriented Architecture (SOA).
These interoperability requirements promote availability of geospatial information.
Examples:
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Future Work• Incorporate interface standard profiles for
additional products• Document a taxonomy of product types• Determine core metadata for each class
of product.• Define metadata requirements for
functional capabilities • Data prototyping
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Summary
• MPWG functions as a subgroup of the GWG to develop data standards for the geospatial community– scientifically engineered metadata standards
to support complex analysis– harmonizing efforts with ISO TC211
standards work
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www.nga.mil
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The MPWG
SARSubgroup
Metadata Profile
Working Group (MPWG)
ONIRSubgroup
EOSubgroup
UNCLASSIFIED
UNCLASSIFIED
The MPWG enables interoperability across the NSG
MPWG Purpose : “An enterprise that supports a seamless, unified common operating picture. Community-wide standards are enablers that provide a foundation for interoperable applications and compatible intelligence products that execute seamlessly across architectures.”
SYERS-2A MPWG (S2AMPWG)
Subgroup