1. N. Fanjeau, Airbus Defence & Space June 11, 2014
HMA-S Specifications OGC OpenSearch Extension for Earth Observation Satellite Tasking Implementation
N. Fanjeau, Airbus Defence & Space
June 11, 2014
OGC TC Geneva / HMA-S /FP

2. Overview OpenSearch Methodology Description Document Search Document
Parameters in a Search operation request
Search operation request URL parameters
Best Practice
Demonstrator
ETS
Resources
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3. OpenSearch Specify how to query a web resource & additional metadata
Description documents
Contain parameterized URL templates that indicate how the search client should make search requests
Search clients to learn about the public interface of a search engine
OpenSearch provides a way to define where that search term goes.
Description element provides some basic metadata about
Contents of the service
Contact information pertaining to it
Set of URL Templates which illustrate the parameters accepted by the service and the variety of output formats
Request interface
Simple,
Consisting of a description of a HTTP GET request
Series of optional key-value parameters that can be used to constrain the search.
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4. Methodology
OGC : OGC OpenSearch Extension for Earth Observation
Satellite Tasking Implementation Best Practice
OGC 13‑026: OGC OpenSearch Extension for Earth Observation
OGC 10‑135: OGC Sensor Planning Service Interface Standard 2.0
Earth Observation Satellite Tasking Extension
13-026
10-135
13-039
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5. OpenSearch Description
The OpenSearch description document for the satellite Tasking is an aggregation of the information available via the GetCapabilities, the DescribeTasking, the DescribeSensor operations of the EO-SPS standard.
SPS GetCapabilities
SPS
DescribeTasking
SPS DescribeSensor
OpenSearch Description
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6. OpenSearch Search
SPS GetFeasibility
SPS
GetTask
OpenSearch
Search
The OpenSearch search operation is mapped to the GetFeasibility operation, the response of the search operation provide for each of the results a summary and the link to their dedicated EO-SPS GetTask operation.
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7. Parameters in a Search operation request
Name
Definition
Data type and value
Multiplicity and use
Equivalent in EOSPS (OGC )
Names equivalent in EOP (OGC )
Platform
A string identifying the platform (e.g. ENVISAT, SPOT).
Character String
One or more (optional)
N/A
eo:platform
SensorType
A string identifying the sensor type.
Code List
OPT
SAR
eo:sensorType
Instrument
A string identifying the instrument (e.g. MERIS, AATSR, ASAR, HRVIR).
Swes:procedure
eo:instrument
CoverageType
Specifies if the imagery should be acquired in one or multiple passes.
SINGLE_SWATH, MONOPASS, MULTIPASS
One (optional)
(Mono- Stereo)acquisitio n / CoverageType
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8. Search operation request URL parameters
Name and example
Optionality and use
platform ={eo: platform }
One or more (optional)
sensorType={eo:sensorType}
instrument={eo:instrument}
CovType ={eosp:CoverageType}
One (optional)
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9. Elements of Search operation response in each search result in atom format
Term
OGC returnable
Atom Element
Description
Multiplicity
Title
dc:title
atom:entry/ atom:title
A title given to the resource. 1
mandatory
Subject
dc:subject
atom:entry/ atom:category
A topic of the content of the resource (a topic category or other taxonomy can be applied) n
optional
Date
eop:EarthObservatio n /om:phenomenonTim e/gml:TimePeriod
atom:entry/ dc:date
A date or range of dates relevant to the resource (ISO-8601).
Envelope
eop:EarthObservatio n /om:featureOfInteres t /eop:Footprint
atom:entry/
georss:*
The spatial extent or scope of the content of the resource defined with an GEORSS element
Relation
dc:relation
atom:entry/ earch’]
Reference to the OpenSearch description document when the resource is search service
atom:entry/ ure’]
Reference to the location of the data resource described in the entry
GetFeasibilityRes ponse
eosps:GetFeasibilityR esponse
atom:entry/ eosps: GetFeasibilityResponse
EO-SPS metadata
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10. Description Document
<Url rel="search“ template=" :8080/HMA-S-FeasibilityService/Sentinel1/search? q={searchterms}&platform={eo:platform?}&compositeType={eo:compositeType?}&maxAmbiguityLevel={eosp:validationParametersSARMaxAmbiguityLevel?}&cloudCover={eo:cloudCover?}&incEl={eosp:acquisitionAngleIncidenceElevation?}&sensorMode={eo:sensorMode?}&hazeAccepted={eosp:validationParametersOPTHazeAcepted?}&snowCover={eo:snowCover?}&pointAl={eosp:acquisitionAnglePointingRangeAlongTrack?}&instrument={eo:instrument?}&resolution={eo:resolution?}&maxSunGlint={eosp:validationParametersOPTmaxSunGlint?}&minLum={eosp:acquisitionParametersOPTMinimumLuminosity?}&sandWindAccepted={eosp:validationParametersOPTSandWindAccepted?}&start={time:start?}&sensorType={eo:sensorType?}&coverage={eosp:coverageType?}&maxNoiseLevel={eosp:validationParametersSARMaximumNoiseLevel?}&pointAc={eosp:acquisitionAnglePointingRangeAcrossTrack?}&box={geo:box?}&polMode={eosp:acquisitionParametersSARPolarizationMode?}&incAz={eosp:acquisitionAngleIncidenceAzimuth?}&end={time:end?}" type="application/atom+xml">
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11. Description Document
<param:Parameter name="platform" title="Platform" value="eo:platform"> <param:option label="Sentinel1" value="Sentinel1"/> </param:Parameter> <param:Parameter name="compositeType" title="Composite type" value="eo:compositeType"> <param:option label="" value="false"/> <param:option label="" value="true"/> </param:Parameter> <param:Parameter maxInclusive="100" minInclusive="0“ name="minLum“ title="Minimum Luminosity of an optical product" value="eosp:acquisitionParametersOPTMinimumLuminosity"/>
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12. Search
<ns:segment> <ns:Segment ns2:id="2"> <ns:footprint> <ns2:Polygon> <ns2:exterior> <ns:AbstractRing xmlns:ns= xmlns:xsi= xsi:type="ns:LinearRingType"> <ns:coordinates ts=" " cs=","decimal="."> , , , , , </ns:coordinates> </ns:AbstractRing> </ns2:exterior> </ns2:Polygon> </ns:footprint>
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13. Search
<ns:acquisitionStartTime> T11:17:57.910Z</ns:acquisitionStartTime> <ns:acquisitionStopTime> T11:23:35.553Z</ns:acquisitionStopTime> <ns:acquisitionMethod> <eop:EarthObservationEquipment xmlns:eop=" <ns2:description xmlns:xsi= xsi:nil="true"/> <ns2:identifier>SSO - S1SAR</ns2:identifier> <eop:platform><eop:Platform> <eop:shortName xmlns:xsi= xsi:nil="true"/> <eop:serialIdentifier>SSO</eop:serialIdentifier> … </eop:EarthObservationEquipment> </ns:acquisitionMethod> </ns:Segment> </ns:segment>
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14. Best Practice
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15. Demonstrator Copyright © 2013 Open Geospatial Consortium
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Copyright © 2013 Open Geospatial Consortium

16. ETS
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17. Resources Google Code: opensearch-sensor-feasibility-system
opensearch-earth-observation-products-system
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