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Service Definition Identification

StatuscolourGreentitleREVIEWEDservice definition identification

title

Service Definition Identification

service definition identification	title	Service definition for the Quantitative Volcanic Ash Information Subscription and Request Service
	edition	00.00.05
	reference date	2024-07-01

Table of Contents

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type	flat

Info

title	Status Key

Status

title	TBD

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title	WORKING

- Content is being worked on, comments discussed

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title	DRAFT

- Draft is ready, comments resolved

StatuscolourGreentitleREVIEWED - Group has reviewed, edited the final draft StatuscolourBluetitleAGREED - Content is finalised and agreed

Service Identification

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Table of Contents

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Service Identification

service identification	service name	Quantitative Volcanic Ash Information Subscription and Request Service

Service Abstract

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service abstract
The Quantitative Volcanic Ash Information Subscription and Request Service allows the service consumer to get quantitative volcanic ash information in accordance with ICAO Annex 3 Amdt 82 and PANS-MET.
The service consumer can subscribe to the service to receive notificationwhen a new significant ash cloud occurs. It is also possible to send a direct request, using a request-reply mechanism, to the service to get the relevant quantitative volcanic ash information.
The meteorological information is issued by the designated Volcanic Ash Advisory Centre (VAAC). The meteorological information is only intended to be used by service consumers within the aviation domain.

Service Definition Provider

status

colourGreentitleREVIEWED
service definition provider
name EUROCONTROL
description EUROCONTROL is an intergovernmental organisation with 41 Member and 2 Comprehensive Agreement States.
point of contact swim@eurocontrol.int

Geographical Extent of Information

StatuscolourGreentitleREVIEWED

geographical extent of information

The service shall offer quantitative volcanic ash information resulting from volcanic eruptions occurring in the service provider's area of responsibility, except when the responsibility of publishing this information has been transferred to another VAAC due to the ash cloud moving into the area of responsibility of this VAAC.

The service shall offer the equivalent quantitative volcanic ash information for the areas of responsibility for which the service provider acts as back-up during outages.

The service shall offer quantitative volcanic ash information resulting from volcanic eruptions occurring outside the service provider's area of responsibility, when the responsibility of publishing this information has been transferred by another VAAC due to an interruption of the operation.

Note: the back-up arrangements are based on mutual agreements between Volcanic Ash Advisory Centre service providers.

Note: the ash cloud may extend beyond the area of responsibility.

Service Categories

StatuscolourGreentitleREVIEWED

service categories	category	category name	regulated information exchange
		value	METEOROLOGICAL_INFORMATION_EXCHANGE
		scheme	http://reference.swim.aero/information-services/service-categories/CodeRegulatedInformationExchangeType.html
	category	category name	information domain
		value	METEOROLOGICAL_INFORMATION
		scheme	https://reference.swim.aero/information-services/service-categories/CodeInformationDomainType.html
	category	category name	business activity
		value	INFORMATION_MANAGEMENT
		scheme	http://reference.swim.aero/information-services/service-categories/CodeBusinessActivityType.html
	category	category name	intended service consumer
		value	CIVIL_AIRSPACE_USER MILITARY_AIRSPACE_USER CIVIL_AIR_NAVIGATION_SERVICE_PROVIDER MILITARY_AIR_NAVIGATION_SERVICE_PROVIDER NETWORK_MANAGER REGULATED_METEOROLOGICAL_SERVICE_PROVIDER AIRPORT_OPERATOR AIR_TRAFFIC_SERVICE_PROVIDER
		scheme	https://reference.swim.aero/information-services/service-categories/CodeStakeholderType.html
	category	category name	intended service provider
		value	REGULATED_METEOROLOGICAL_SERVICE_PROVIDER
		scheme	http://reference.swim.aero/information-services/service-categories/CodeStakeholderType.html
	category	category name	service type
		value	METEOROLOGICAL_FEATURE_ACCESS_SERVICE METEOROLOGICAL_INFORMATION_SUBSCRIPTION_SERVICE METEOROLOGICAL_COVERAGE_ACCESS_SERVICE
		scheme	http://reference.swim.aero/information-services/service-categories/CodeServiceType.html

Service Standard Reference

status

colourGreentitleREVIEWED
Info
title Explanatory note
This field is left empty. It is expected that the service definition developed in Europe by MET3SG will reference any ICAO-level information service definition.

service standard reference

reference

implemented options
deviations/additions

Operational Environment

StatuscolourGreentitleREVIEWED

Operational Environment

operational environment

operational needs

ICAO Annex 3 Amdt 82 and PANS-MET requires that quantitative volcanic ash (QVA) concentration information is provided by designated Volcanic Ash Advisory Centres (VAAC) as part of the International Airways Volcano Watch (IAVW) framework overseen by the International Civil Aviation Organization (ICAO).

The quantitative volcanic ash (QVA) concentration information is provided per volcano in the form of a high-resolution four-dimensional representation of a volcanic ash cloud based on 3-hourly timesteps.

New information is provided when there is a significant change in the erupting characteristics or at 6 hourly intervals until the ash is no longer present.

The information is intended for use in operator’s flight planning and decision support systems allowing, e.g., more efficient routes in accordance with their safety management programme during significant volcanic ash cloud events.

capabilities

The service provides high quality, up-to-date, trusted, regulated meteorological information in digital form for use by service consumers within the aviation domain.

information exchange requirements

The service takes into account the following information exchange requirements:

IER 1

The information as defined in ICAO Annex 3 Amdt 82 and PANS-MET:

expected dimensions (horizontal and vertical) of significant volcanic ash cloud at four concentration thresholds (0.2mg/m³, 2mg/m³, 5mg/m³ and 10mg/m³)
gridded deterministic forecast of significant volcanic ash cloud showing the expected ash concentration
gridded probabilistic forecast of significant volcanic ash cloud showing the probability of exceeding four concentration thresholds (0.2mg/m³, 2mg/m³, 5mg/m³ and 10mg/m³)

Note: significant in this context means an ash cloud that poses a widespread impact to aircraft operations and air navigation.

Service Functions

Statuscolour

GreentitleREVIEWED
service functions

function name Request list of volcanoes
description The service consumer may be able to request a list of volcanoes for which there is information.
real-world effect The service consumer receives the list of volcanoes to use in further functions.
function name Request quantitative volcanic ash information
description
The service consumer shall be able to request the latest quantitative volcanic ash information filtered by erupting volcano number,forecast timesteps and logical (e.g. severity threshold) operators.
real-world effect The meteorological information is received and can be used in ATM and other systems.
function name
Request the information in a specific format
description The service consumer shall be able to request that the quantitative volcanic ash information be returned as polygons (IWXXM) and/or deterministic gridded data (NetCDF) and/or probabilistic gridded data (NetCDF).
real-world effect The meteorological information is received in the specified format and can be used in ATM and other systems.
function name Subscribe to quantitative volcanic ash information
description
The service consumer shall be able to subscribe in order to receive notifications when a significant volcanic ash cloud occurs and unsubscribe when needed.
real-world effect The service consumer subscribes to the service and will receive notifications as per the subscription or unsubscribes from the service.
function name Distribute notification
description The service shall distribute a notification detailing how to access the quantitative volcanic ash information when a significant volcanic ash cloud occurs.
real-world effect The service consumer receives notifications with details on how to access the relevant QVA information.

Service Access and Use Conditions

StatuscolourGreentitle

REVIEWED
service access and use conditions

legal constraints

service policies
business policy
It shall be made clear to new service consumers that they must also enter an agreement with the back-up VAACs in case they need to revert to the back-up.
operational policy
There shall be a service policy to ensure that only service consumers within the aviation domain can use the service.
The service policy shall include a requirement that service consumers cannot pass the information obtained from the service to non-aviation users without prior authorisation from the service provider.
technical policy

service consumption constraints

There shall be a service consumption constraint to ensure that a service consumer does not impose undue loads on computer and network resources, for example, by polling it at a higher frequency than the status is normally provided.

Security Constraints

status

colourGreentitleREVIEWED
security constraints

authentication
The service shall ensure consumer authentication in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0042.
The service shall ensure provider authentication in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0042.
authorisation
The service shall ensure that satisfactory authorisation is put in place in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0070.
confidentiality
The service shall ensure point-to-point confidentiality in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile through the use of Transport Layer Security (TLS) 1.2 or above.
integrity
The service shall ensure point-to-point integrity in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile through the use of Transport Layer Security (TLS) 1.2 or above.

Quality of Service

StatuscolourGreentitleREVIEWED

quality of service	performance	capacity	The service shall achieve a quality that is sufficient to ensure the service is fit for purpose. The service should ensure that a single user is unable to monopolise a service or to degrade it below agreed service levels for others users.
	performance	response time	The service shall achieve a quality that is sufficient to ensure the service is fit for purpose.
	reliability	availability	The service shall achieve a quality that is sufficient to ensure the service is fit for purpose. Note: the following factors must be used in deciding the fitness for purpose: the availability offered by the designated back-up VAACs the number of users likely to be delayed significantly by a loss of the service the acknowledgement that the availability is expected to be higher when a volcano is erupting
	reliability	recoverability	The service shall achieve a quality that is sufficient to ensure the service is fit for purpose.
	security	confidentiality	The service shall ensure confidentiality by using SWIM Technical Infrastructure (TI) Yellow Profile bindings.
	security	integrity	The service shall ensure integrity by using SWIM Technical Infrastructure (TI) Yellow Profile bindings.

Quality of Data

status

colourGreentitleREVIEWED
quality of data
The quality of quantitative volcanic ash information offered by the service shall be verified by the service provider.
Information on the quality of the QVA information offered by the service shall be reported annually to the ICAO Met Panel Met Operations working group relating to the IAVW who provide oversight of QVA data provision

Source of Information

StatuscolourGreentitleREVIEWED

source of information

source

The service provider shall ensure that the quantitative volcanic ash information offered by the service is based on data received from the appropriate authorised originating sources. This includes:

Volcano observatory
REGULATED_METEOROLOGICAL_SERVICE_PROVIDER acting as a designated VAAC.

Note: EUMETSAT may be used to make sure the ash plume corresponds to where it is already being detected by the satellites.

modifications

Note: atmospheric modelling techniques are used to generate the output.

Service Validation Information

StatuscolourGreentitleREVIEWED

Service Validation Information

Info

title	Explanatory note

This field is left empty.

service validation information	description

Application Message Exchange Pattern

status

colourGreentitleREVIEWED
application message exchange pattern
PUBLISH_SUBSCRIBE
SYNCHRONOUS_REQUEST_REPLY

Service Behaviour

StatuscolourGreentitleREVIEWED

service behaviour
typical behaviour
The service behaviour shall be in accordance with the patterns detailed in the Message Exchange Patterns: Identification Guidelines.
The typical service behaviour, is:
The service consumer subscribes to the service
The service sends notifications to subscribers when QVA information is available that matches their subscription
The service consumer requests the QVA information using the details contained in the notification

The interfaces that support the service have different behaviour. A combination of an AMQP 1.0 implementation and an OGC implementation shall be used for the basic behaviour.
The typical behaviour for PUBLISH_SUBSCRIBE means that:
The subscription is handled by either:
a request-reply implementation (see Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface) or
an email request to the service provider.
The distribution of the notifications is handled by an AMQP 1.0 implementation (seeQuantitative Volcanic Ash Information Subscription and Request Service Distribution Interface).
The typical behaviour for SYNCHRONOUS_REQUEST_REPLY (as used in Quantitative Volcanic Ash Information Subscription and Request Service Request Interface) is as follows:
The request message is sent from the service consumer to the service
The service consumer remains blocked while awaiting the reply
The service remains blocked while processing the reply
The Quantitative Volcanic Ash Information Message, the reply message, is sent from the service to the service consumer.

Service Monitoring

status

colourGreentitleREVIEWED
service monitoring
A service monitoring mechanism should be made available to service consumersand alert them when the service is unavailable so that they can switch to the back-up service.

Service Interfaces

StatuscolourGreentitleREVIEWED

service interfaces	interface	name	Quantitative Volcanic Ash Information Subscription and Request Service Request Interface
		description	Allows the service consumer to request filtered quantitative volcanic ash information. Note: this interface is used to group the operations offered by the chosen OGC standard.
		provider/consumer side	Provider side
	interface	name	Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface
		description	Allows the service consumer to subscribe to the service. It allows the service consumer to manage the subscriptions e.g. to unsubscribe. Note: this can be handled by a separate dedicated subscription service. Note: some service providers will prefer to receive subscription requests by email.
		provider/consumer side	Provider side
	interface	name	Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface
		description	Allows the service provider to distribute notifications when a new significant ash cloud occurs meeting the need of the service consumer that has subscribed for updates.
		provider/consumer side	Consumer side

SWIM TI Profile and Interface Bindings

StatuscolourGreentitleREVIEWED

Quantitative Volcanic Ash Information Subscription and Request Service Request Interface

SWIM TI profile and interface bindings	profile name	EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile
	profile version	1.1
	selected service interface binding	WS_LIGHT
	selected network interface binding	The service shall use the network bindings of the SWIM TIYP.
	description	The interface shall use at least one of the following OGC standards: for services that exchange the meteorological information as resources: OGC API – Environmental Data Retrieval Standard; for services that exchange the meteorological information as coverages: OGC Web Coverage Service (WCS) Interface Standard – Core, version 2.0; for services that exchange the meteorological information as features: OGC Web Feature Service 2.0 Interface Standard;. Note: it is expected that the service will implement the OGC API – Environmental Data Retrieval Standard by November 2026.

Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface

SWIM TI profile and interface bindings	profile name	EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile
	profile version	1.1
	selected service interface binding	WS_LIGHT
	selected network interface binding	The service shall use the network bindings of the SWIM Technical Infrastructure (TI) Yellow Profile.
	description

Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface

SWIM TI profile and interface bindings	profile name	EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile
	profile version	1.1
	selected service interface binding	SWIM_TI_YP_1_1_AMQP_MESSAGING
	selected network interface binding	The service shall use the network bindings of the SWIM TIYP.
	description	AMQP 1.0 shall be used to distribute messages as explained in the Publish/Subscribe Push MEP: Implementation Guidance.

Service Interface Protocols and Data Format

status

colourGreentitleREVIEWED
service interface protocols and data format

transport / messaging protocols
The service shall use TLS1.2 or later in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile.
data format

Info
This is captured at Service Message level (see below).
WS_LIGHT does not mandate a data format. The header expresses what is used.

Service Operations

StatuscolourGreentitleREVIEWED

.

Service Operations

Quantitative Volcanic Ash Information Subscription and Request Service Request Interface

Info

title	Explanatory note

The OGC Web Feature Service Interface Standard, Web Coverage Service (WCS) Interface Standard and OGC API – Environmental Data Retrieval Standard are used to implement the service operations.

It is not the intention to repeat the standardised operations here. However, the table below illustrates how the WFS GetFeature operation would look in the context of this service.

Service operations	operation	operation name	GetFeature
		description	The WFS GetFeature operation returns a selection of features from a data store. It responds to a GetFeature Request message with a Quantitative Volcanic Ash Information Message that satisfies the query expressions specified in the request.
		messages	Request, Quantitative Volcanic Ash Information Message

Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface

Service operations

reference

url

Meteorological SWIM Services Subscription Interface Standard

description

The standard operations for subscription and subscription management.

The following operations shall be implement at a minimum:

subscribe
unsubscribe

Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface

Service operations	operation	operation name	publish
		description	This operation allows the service provider to publish Quantitative Volcanic Ash Information Notifications to service consumers based on their subscriptions.
		messages	Quantitative Volcanic Ash Information Notification

Service Messages

status

colourGreentitleREVIEWED

Info
title Explanatory note
The OGC Web Feature Service Interface Standard, Web Coverage Service (WCS) Interface Standard and OGC API – Environmental Data Retrieval Standard detail the basic messages such as request and response messages.
It is not the intention to repeat the standardised messages here. The table below provides extra details for the Quantitative Volcanic Ash Information Message.

service messages

message
name
Quantitative Volcanic Ash Information Message
description
The output message containing thequantitative volcanic ash information.
direction Out
data format
QVA information shall be provided in two file formats:
ICAO’s Meteorological Information Exchange Model (IWXXM) format containing a collection of features;
NetCDF file containing gridded volcanic ash concentration data.
Note: the file may be compressed.
message name Request
description
Request message submitted to the service containing query expressions for the WFS GetFeature operation, WCS GetCoverage operation or the EDR HTTP GET operation and the required data format for the Quantitative Volcanic Ash Information Message.
direction In
data format JSON and/or XML
message name
Quantitative Volcanic Ash Information Notification
description
The notification and way to retrieve the Quantitative Volcanic Ash Information Message e.g. the URL, or the volcano number.
The message will include:
publication time
operation e.g. if it is an update or a new message
The message can include:
identifier of the VAAC
event type e.g. if it is live
Note: an example of the structure of the URL that is used to retrieve the QVA in IWXXM format using an EDR implementation: https://{organizaton URL}/QVACI_Iwxxm/Locations/{VolcanoNumber}
Note: the URL, if provided, could be a request formatted for the Quantitative Volcanic Ash Information Subscription and Request Service Request Interface.
direction Out
data format
JSON and/or XML
reference url Meteorological SWIM Services Subscription Interface Standard
description The standard messages for subscription and subscription management.

Information Definition (Minimum) and (Extended)

StatuscolourGreentitleREVIEWED

information definition
The IWXXM QVA information shall include feature information for four ash concentration thresholds (≥0.2mg/m3, ≥2.0mg/m3, ≥5.0mg/m3, ≥10mg/m3) in accordance with the QVA IWXXM schema.
The probabilistic QVA information shall include the probability of exceeding four ash concentration thresholds (≥0.2mg/m3, ≥2.0mg/m3, ≥5.0mg/m3, ≥10mg/m3) at a 0.25 degree horizontal resolution and for 12 vertical levels in accordance with the NetCDF4 specification for gridded data.
The deterministic QVA information shall include an expected ash concentration for each grid point at a 0.25 degree horizontal resolution and for 12 vertical levels in accordance with the NetCDF4 specification for gridded data.
All information types shall be provided for the period 0-hours to 24-hours at 3-hourly intervals.
Note: the QVA IWXXM schema is expected to be included in the 2025-2 IWXXM release.

Filter Encoding

StatuscolourGreentitleREVIEWED

filter encoding

The Quantitative Volcanic Ash Information Subscription and Request Service Request Interface shall support filtering by volcano number (i.e., the IAVCIE number) and forecast timestep (dateTime).

The Quantitative Volcanic Ash Information Subscription and Request Service Request Interface should support filtering of probabilistic information based on the ash concentration threshold (≥0.2mg/m3, ≥2.0mg/m3, ≥5.0mg/m3, ≥10mg/m3).

The Quantitative Volcanic Ash Information Subscription and Request Service Request Interface may support filtering based on geographic bounding box defined in the OGC Filter Encoding 2.0 Encoding Standard.

The Quantitative Volcanic Ash Information Subscription and Request Service Request Interface shall support the selection of one or more of the supported data set types.

If the service implements the OGC API – Environmental Data Retrieval Standard, the Quantitative Volcanic Ash InformationSubscription and Request Service Subscription Interface shall allow for the selection of subscription based on clearly defined criteria.

Note: for example, subscriptions can be for all QVA messages or by volcano number or by data format type (deterministic, probabilistic or in IWXXM format).

Machine-Readable Service Interface Definition

status

colourGreentitleREVIEWED
Info
title Explanatory note
This field is left empty. No machine-readable service interface definition is provided.

machine-readable service interface definition
reference

Model View

StatuscolourGreentitleREVIEWED

Info

title	Explanatory note

This field is left empty. No model view is provided.

model view	reference

Abbreviations and Acronyms

status

colourGreentitleREVIEWED
abbreviations and acronyms

abbreviation code AMQP
term Advanced Message Queuing Protocol
abbreviation code API
term Application Programming Interface
abbreviation code ATM

term AIr Traffic Management
abbreviation code IAVW
term International Airways Volcano Watch
abbreviation code ICAO
term International Civil Aviation Organization
abbreviation code IWXXM
term ICAO Meteorological Information Exchange Model
abbreviation code JSON
term JavaScript Object Notation
abbreviation code MEP
term Message Exchange Pattern
abbreviation code NetCDF
term network Common Data Form
abbreviation code OGC

term Open Geospatial Consortium
abbreviation code PANS-MET
term ICAO Procedures for Air Navigation Services – Meteorology
abbreviation code QVA

term Quantitative Volcanic Ash
abbreviation code SWIM
term System wide information management
abbreviation code TI
term Technical Infrastructure
abbreviation code TIYP

term Technical Infrastructure Yellow Profile
abbreviation code TLS
term Transport Layer Security
abbreviation code URL
term
Uniform Resource Locator
abbreviation code VAAC
term Volcanic Ash Advisory Centre
abbreviation code WCS
term Web Coverage Service
abbreviation code WFS
term Web Feature Service
abbreviation code XML
term Extensible Markup Language

Appendix A: References

StatuscolourGreentitleREVIEWED

references reference title IWXXM
version ICAO Meteorological Information Exchange Model
description The ICAO Meteorological Information Exchange Model (IWXXM) is an exchange model capturing Meteorological information. It was introduced to support the exchange of meteorological information in accordance with ICAO Annex 3.
url https://github.com/wmo-im/iwxxm
document type INFORMATION_DEFINITION
reference title OGC API – Environmental Data Retrieval Standard
version 1.1
description OGC API standards define modular API building blocks to spatially enable Web APIs in a consistent way. The OpenAPI specification is used to define the API building blocks.
url
https://www.ogc.org/standard/ogcapi-edr/
https://docs.ogc.org/is/19-086r6/19-086r6.html
document type SERVICE_SPECIFICATION
reference title OGC Web Coverage Service (WCS) Interface Standard
version version 2.0
description A Web Coverage Service (WCS) offers multi-dimensional coverage data for access over the Internet. WCS Core specifies a core set of requirements that a WCS implementation must fulfill.
url https://www.ogc.org/standard/wcs/
document type SERVICE_SPECIFICATION
reference title OGC Web Feature Service 2.0 Interface Standard
version
description
WFS offers direct fine-grained access to geographic information at the feature and feature property level.
Note: This is equivalent to ISO 19142 - Geographic Information - Web Feature Service.
url https://www.ogc.org/standard/wfs/
document type SERVICE_SPECIFICATION
reference title OGC Filter Encoding 2.0 Encoding Standard
version
description
This jointly developed OGC and ISO TC/211 International Standard describes an XML and KVP encoding of a system neutral syntax for expressing projections, selection and sorting clauses collectively called a query expression. These components are modular and intended to be used together or individually by other standards which reference this International Standard.
Note: This is equivalent to ISO 19143 - Geographic Information - Filter encoding.
url https://www.ogc.org/docs/is
document type SERVICE_SPECIFICATION
reference title Message Exchange Patterns: Identification Guidelines
version JULY 2nd, 2019
description Document intended to facilitate the understanding of message exchange patterns from an application and Technical Infrastructure perspective.
url https://reference.swim.aero/technical-infrastructure/message-exchange-patterns-identification-guidelines.html
document type SERVICE_BEHAVIOUR_DESCRIPTION
reference

title Publish/Subscribe Push MEP: Implementation Guidance
version JULY 2nd, 2019
description This document intends to serve as implementation guidance of the Publish/Subscribe Push Message Exchange Pattern using SWIM-TI Yellow Profile Service Bindings.
url https://reference.swim.aero/technical-infrastructure/guidance-for-pub-sub-push-implementation.html
document type SERVICE_SPECIFICATION

Version	Old Version 50	New Version Current
Changes made by	WILSON Scott	WILSON Scott
Saved on	2024 Jul 01	2024 Jul 08

service definition provider	name	EUROCONTROL
	description	EUROCONTROL is an intergovernmental organisation with 41 Member and 2 Comprehensive Agreement States.
	point of contact	swim@eurocontrol.int

service functions	function	name	Request list of volcanoes
		description	The service consumer may be able to request a list of volcanoes for which there is information.
		real-world effect	The service consumer receives the list of volcanoes to use in further functions.
	function	name	Request quantitative volcanic ash information
		description	The service consumer shall be able to request the latest quantitative volcanic ash information filtered by erupting volcano number,forecast timesteps and logical (e.g. severity threshold) operators.
		real-world effect	The meteorological information is received and can be used in ATM and other systems.
	function	name	Request the information in a specific format
		description	The service consumer shall be able to request that the quantitative volcanic ash information be returned as polygons (IWXXM) and/or deterministic gridded data (NetCDF) and/or probabilistic gridded data (NetCDF).
		real-world effect	The meteorological information is received in the specified format and can be used in ATM and other systems.
	function	name	Subscribe to quantitative volcanic ash information
		description	The service consumer shall be able to subscribe in order to receive notifications when a significant volcanic ash cloud occurs and unsubscribe when needed.
		real-world effect	The service consumer subscribes to the service and will receive notifications as per the subscription or unsubscribes from the service.
	function	name	Distribute notification
		description	The service shall distribute a notification detailing how to access the quantitative volcanic ash information when a significant volcanic ash cloud occurs.
		real-world effect	The service consumer receives notifications with details on how to access the relevant QVA information.

service access and use conditions	legal constraints
	service policies	business policy	It shall be made clear to new service consumers that they must also enter an agreement with the back-up VAACs in case they need to revert to the back-up.
		operational policy	There shall be a service policy to ensure that only service consumers within the aviation domain can use the service. The service policy shall include a requirement that service consumers cannot pass the information obtained from the service to non-aviation users without prior authorisation from the service provider.
		technical policy
	service consumption constraints		There shall be a service consumption constraint to ensure that a service consumer does not impose undue loads on computer and network resources, for example, by polling it at a higher frequency than the status is normally provided.

security constraints	authentication	The service shall ensure consumer authentication in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0042. The service shall ensure provider authentication in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0042.
	authorisation	The service shall ensure that satisfactory authorisation is put in place in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0070.
	confidentiality	The service shall ensure point-to-point confidentiality in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile through the use of Transport Layer Security (TLS) 1.2 or above.
	integrity	The service shall ensure point-to-point integrity in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile through the use of Transport Layer Security (TLS) 1.2 or above.

service messages	message	name	Quantitative Volcanic Ash Information Message
		description	The output message containing thequantitative volcanic ash information.
		direction	Out
		data format	QVA information shall be provided in two file formats: ICAO’s Meteorological Information Exchange Model (IWXXM) format containing a collection of features; NetCDF file containing gridded volcanic ash concentration data. Note: the file may be compressed.
	message	name	Request
		description	Request message submitted to the service containing query expressions for the WFS GetFeature operation, WCS GetCoverage operation or the EDR HTTP GET operation and the required data format for the Quantitative Volcanic Ash Information Message.
		direction	In
		data format	JSON and/or XML
	message	name	Quantitative Volcanic Ash Information Notification
		description	The notification and way to retrieve the Quantitative Volcanic Ash Information Message e.g. the URL, or the volcano number. The message will include: publication time operation e.g. if it is an update or a new message The message can include: identifier of the VAAC event type e.g. if it is live Note: an example of the structure of the URL that is used to retrieve the QVA in IWXXM format using an EDR implementation: https://{organizaton URL}/QVACI_Iwxxm/Locations/{VolcanoNumber} Note: the URL, if provided, could be a request formatted for the Quantitative Volcanic Ash Information Subscription and Request Service Request Interface.
		direction	Out
		data format	JSON and/or XML
	reference	url	Meteorological SWIM Services Subscription Interface Standard
	reference	description	The standard messages for subscription and subscription management.

abbreviations and acronyms	abbreviation	code	AMQP
	abbreviation	term	Advanced Message Queuing Protocol
	abbreviation	code	API
	abbreviation	term	Application Programming Interface
	abbreviation	code	ATM
		term	AIr Traffic Management
	abbreviation	code	IAVW
	abbreviation	term	International Airways Volcano Watch
	abbreviation	code	ICAO
	abbreviation	term	International Civil Aviation Organization
	abbreviation	code	IWXXM
	abbreviation	term	ICAO Meteorological Information Exchange Model
	abbreviation	code	JSON
	abbreviation	term	JavaScript Object Notation
	abbreviation	code	MEP
	abbreviation	term	Message Exchange Pattern
	abbreviation	code	NetCDF
	abbreviation	term	network Common Data Form
	abbreviation	code	OGC
		term	Open Geospatial Consortium
	abbreviation	code	PANS-MET
	abbreviation	term	ICAO Procedures for Air Navigation Services – Meteorology
	abbreviation	code	QVA
		term	Quantitative Volcanic Ash
	abbreviation	code	SWIM
	abbreviation	term	System wide information management
	abbreviation	code	TI
	abbreviation	term	Technical Infrastructure
	abbreviation	code	TIYP
		term	Technical Infrastructure Yellow Profile
	abbreviation	code	TLS
	abbreviation	term	Transport Layer Security
	abbreviation	code	URL
	abbreviation	term	Uniform Resource Locator
	abbreviation	code	VAAC
	abbreviation	term	Volcanic Ash Advisory Centre
	abbreviation	code	WCS
	abbreviation	term	Web Coverage Service
	abbreviation	code	WFS
	abbreviation	term	Web Feature Service
	abbreviation	code	XML
	abbreviation	term	Extensible Markup Language

references	reference	title	IWXXM
		version	ICAO Meteorological Information Exchange Model
		description	The ICAO Meteorological Information Exchange Model (IWXXM) is an exchange model capturing Meteorological information. It was introduced to support the exchange of meteorological information in accordance with ICAO Annex 3.
		url	https://github.com/wmo-im/iwxxm
		document type	INFORMATION_DEFINITION
	reference	title	OGC API – Environmental Data Retrieval Standard
		version	1.1
		description	OGC API standards define modular API building blocks to spatially enable Web APIs in a consistent way. The OpenAPI specification is used to define the API building blocks.
		url	https://www.ogc.org/standard/ogcapi-edr/ https://docs.ogc.org/is/19-086r6/19-086r6.html
		document type	SERVICE_SPECIFICATION
	reference	title	OGC Web Coverage Service (WCS) Interface Standard
		version	version 2.0
		description	A Web Coverage Service (WCS) offers multi-dimensional coverage data for access over the Internet. WCS Core specifies a core set of requirements that a WCS implementation must fulfill.
		url	https://www.ogc.org/standard/wcs/
		document type	SERVICE_SPECIFICATION
	reference	title	OGC Web Feature Service 2.0 Interface Standard
		version
		description	WFS offers direct fine-grained access to geographic information at the feature and feature property level. Note: This is equivalent to ISO 19142 - Geographic Information - Web Feature Service.
		url	https://www.ogc.org/standard/wfs/
		document type	SERVICE_SPECIFICATION
	reference	title	OGC Filter Encoding 2.0 Encoding Standard
		version
		description	This jointly developed OGC and ISO TC/211 International Standard describes an XML and KVP encoding of a system neutral syntax for expressing projections, selection and sorting clauses collectively called a query expression. These components are modular and intended to be used together or individually by other standards which reference this International Standard. Note: This is equivalent to ISO 19143 - Geographic Information - Filter encoding.
		url	https://www.ogc.org/docs/is
		document type	SERVICE_SPECIFICATION
	reference	title	Message Exchange Patterns: Identification Guidelines
		version	JULY 2nd, 2019
		description	Document intended to facilitate the understanding of message exchange patterns from an application and Technical Infrastructure perspective.
		url	https://reference.swim.aero/technical-infrastructure/message-exchange-patterns-identification-guidelines.html
		document type	SERVICE_BEHAVIOUR_DESCRIPTION
	reference	title	Publish/Subscribe Push MEP: Implementation Guidance
		version	JULY 2nd, 2019
		description	This document intends to serve as implementation guidance of the Publish/Subscribe Push Message Exchange Pattern using SWIM-TI Yellow Profile Service Bindings.
		url	https://reference.swim.aero/technical-infrastructure/guidance-for-pub-sub-push-implementation.html
		document type	SERVICE_SPECIFICATION

Page Comparison

Versions Compared

Key

Service Definition Identification

Service Definition Identification

Service Identification

Service Identification

Service Abstract

Service Definition Provider

colourGreentitleREVIEWEDservice definition providernameEUROCONTROLdescriptionEUROCONTROL is an intergovernmental organisation with 41 Member and 2 Comprehensive Agreement States.point of contactswim@eurocontrol.int

Geographical Extent of Information

Service Categories

Service Standard Reference

colourGreentitleREVIEWED InfotitleExplanatory noteThis field is left empty. It is expected that the service definition developed in Europe by MET3SG will reference any ICAO-level information service definition.service standard referencereferenceimplemented optionsdeviations/additions

Operational Environment

Operational Environment

Service Functions

Service Access and Use Conditions

Security Constraints

Quality of Service

Quality of Data

Source of Information

Service Validation Information

Service Validation Information

Application Message Exchange Pattern

colourGreentitleREVIEWEDapplication message exchange patternPUBLISH_SUBSCRIBESYNCHRONOUS_REQUEST_REPLY

Service Behaviour

Service Monitoring

colourGreentitleREVIEWEDservice monitoringA service monitoring mechanism should be made available to service consumersand alert them when the service is unavailable so that they can switch to the back-up service.

Service Interfaces

SWIM TI Profile and Interface Bindings

Quantitative Volcanic Ash Information Subscription and Request Service Request Interface

Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface

Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface

Service Interface Protocols and Data Format

Service Operations

Service Operations

Quantitative Volcanic Ash Information Subscription and Request Service Request Interface

Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface

Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface

Service Messages

Information Definition (Minimum) and (Extended)

Filter Encoding

Machine-Readable Service Interface Definition

colourGreentitleREVIEWED InfotitleExplanatory noteThis field is left empty. No machine-readable service interface definition is provided.machine-readable service interface definitionreference

Model View

Abbreviations and Acronyms

Appendix A: References

colourGreentitleREVIEWED
service definition provider
name EUROCONTROL
description EUROCONTROL is an intergovernmental organisation with 41 Member and 2 Comprehensive Agreement States.
point of contact swim@eurocontrol.int

colourGreentitleREVIEWED
Info
title Explanatory note
This field is left empty. It is expected that the service definition developed in Europe by MET3SG will reference any ICAO-level information service definition.

service standard reference

reference

implemented options
deviations/additions

colourGreentitleREVIEWED
application message exchange pattern
PUBLISH_SUBSCRIBE
SYNCHRONOUS_REQUEST_REPLY

colourGreentitleREVIEWED
service monitoring
A service monitoring mechanism should be made available to service consumersand alert them when the service is unavailable so that they can switch to the back-up service.

colourGreentitleREVIEWED
Info
title Explanatory note
This field is left empty. No machine-readable service interface definition is provided.

machine-readable service interface definition
reference