FMI - TAF in IWXXM 1.0
Current JSON Original JSON

Abstract

The service provides the latest TAF reports in IWXXM for Finnish aerodromes in compliance with ICAO Annex 3, PANS-MET and EU Implementing Regulations.

The IWXXM data can be retrieved via:

  • Request/reply: OGC API - Environmental Data Retrieval (EDR) endpoint, where the IWXXM is provided as a ZIP archive
  • Subscription (publish/subscribe): AMQP 1.0, where the message contains the IWXXM as payload
Service Type
SWIM_COMPLIANT
Life Cycle
OPERATIONAL
Business Activity Type
AERODROME_OPERATION
AIRSPACE_ORGANISATION_AND_MANAGEMENT
INFORMATION_MANAGEMENT
SERVICE_DELIVERY_MANAGEMENT
Intended Consumer
AIR_TRAFFIC_SERVICE_PROVIDER
AIRPORT_OPERATOR
AIRSIDE_GROUND_HANDLER
CIVIL_AIR_NAVIGATION_SERVICE_PROVIDER
CIVIL_AIRSPACE_USER
COMMUNICATION_NAVIGATION_AND_SURVEILLANCE_SERVICE_PROVIDER
MILITARY_AIR_NAVIGATION_SERVICE_PROVIDER
MILITARY_AIRSPACE_USER
PROVIDER_OF_DATA_SERVICES
REGULATED_METEOROLOGICAL_SERVICE_PROVIDER
Information Exchange Category
METEOROLOGICAL_INFORMATION_EXCHANGE
Application Message Exchange Pattern Entity
Request/Reply
FIR ICAO Location Indicator
EFIN
State ICAO Nationality Letters
FI
Geospatial Categorisation Description
The dataset is valid for Finland (Helsinki FIR/EFIN).
Other
Service Type: METEOROLOGICAL_FEATURE_ACCESS_SERVICE
In-Operation Date
19-Dec-2025
Provider
FMI

FMI is the designated aeronautical meteorological service provider for Helsinki FIR as designated by the Ministry of Transport and Communications of Finland and as certified by Finnish Transport and Communications Agency.

 

Provider Type
REGULATED_METEOROLOGICAL_SERVICE_PROVIDER
Point of Contact
Operational Needs

This service contributes to fulfilling operational needs as defined in Commission Implementing Regulation (EU) 2017/373 and ICAO Annex 3. It supports the EU Implementing Regulation 2021/116 - Common Project One.

Information Exchange Requirements

IER 1 - The information currently included in the TAF as defined in Commission Implementing Regulation (EU) 2017/373, ICAO Annex 3 Amendment 82, and PANS-MET.

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.

Distribute Data

The service distributes the data according to the stored subscriptions and topics.

Request Data

The consumer can request data from the service using an OGC API - EDR endpoint.

Subscribe to Data

The user can subscribe to data via AMQP 1.0. Messages follow the SWIM TI Yellow Profile (Messaging).

Information Retainment

According to ICAO Annex 3, meteorological information is retained for a period of at least 30 days from the date of issue.

Subscription

Consumers begin receiving data by connecting to the published endpoints with appropriate credentials; no explicit subscribe/unsubscribe API is provided. Contact FMI Aviation Customer Service via e-mail for credentials and details.

Authentication and authorization

Access is limited by policy to users within the Aviation domain. Authentication is managed using SASL PLAIN for AMQP, and API keys for EDR API. In the future authentication and authorization via EACP issued Aviation Domain Certificate may be required to use the services.

Encryption

Communication is encrypted per SWIM TI Yellow Profile.

Signature

The requested information may contain a digital signature using SHA-256 or stronger.

Time Behaviour

Under normal operations 95% of messages will be delivered within 5 minutes after the issuing time.

Capacity

Capacity of the services is monitored and can be reduced and/or revoked in case of overload of the system.

Integrity

Integrity is protected by using TLS layer for all the service interface bindings.

Confidentiality

Data delivery is only available for registered users, who need to present their credentials for access to the services using API keys for HTTP based connections, and using SASL plain for AMQP connections.

AIRM

ATM Information Reference Model

AMQP

Advanced Queueing Message Protocol (1.0) – per SWIM TI Yellow Profile Messaging

ATC

Air Traffic Control

ATM

Air Traffic Management

FMI

Finnish Meteorological Institute

HTTP

Hypertext Transfer Protocol

ICAO

International Civil Aviation Organization

IER

Information Exchange Requirement

IR

Implementation Rules

ISRM

Information Service Reference Model

IWXXM

ICAO Meteorological Information Exchange Model

METAR

Meteorological Aerodrome Report

NAMCON

Northern Europe Aviation Meteorology Consortium

NWS

National Weather Service

OGC

Open Geospatial Consortium

PCP

Pilot Common Project

WMO

World Meteorological Organization

SIGMET

Significant meteorological phenomena

TAF

Terminal Aerodrome Forecast

Information
TAF (Terminal Aerodrome Forecast)
A digital aeronautical meteorological forecast for an aerodrome, covering a defined validity period, encoded and exchanged using IWXXM.
Filtering Capabilities (EDR)

Filtering is exposed through OGC API - EDR query parameters and collections, including spatial, temporal, and parameter subsetting of IWXXM-derived attributes (e.g., aerodrome ICAO designator, validity period).

Filtering Capabilities (AMQP)

Topic-based filtering is available through the broker’s topic hierarchy. Private queues with provider-defined selectors consistent with SWIM TI Yellow Profile may be provisioned.

The service provider ensures that the data offered for the Finnish FIR within this service is created by FMI, a REGULATED_METEOROLOGICAL_SERVICE_PROVIDER. The service may also contain data provided by other REGULATED_METEOROLOGICAL_SERVICE_PROVIDERs from NAMCON states.
Transport Security

AMQP uses amqps:// over TLS. SASL EXTERNAL (client certificate) may be required. Provider may use server certificates in the EACP chain at a later point.

Topic Structure

Messages are published under weather.aviation.taf. This covers all messages in the Finnish FIR (EFIN), and may contain messages for the NAMCON area. AMQP 1.0 filters (e.g., ICAO location identifier) can be applied via message headers as defined by the message schema.

Payload Encoding

IWXXM content is carried as plain text XML (not gzipped) via AMQP, and zip archive via EDR API.

Flow Control and Limits

Default link credit and connection limits are to be confirmed; values will be documented in narrative connection documentation when available.

Typical Request/Reply Behaviour

The request is sent from the consumer to the EDR service, which processes the request and returns the requested IWXXM TAF message(s) as a zip archive.

Typical Data Distribution Behaviour

The service sends data to consumers when available and matching their connection parameters using AMQP 1.0 per SWIM TI Yellow Profile Messaging.

EDR Request

The interface is used to receive the data via OGC API - EDR.

PROVIDER_SIDE
SYNCHRONOUS_REQUEST_RESPONSE
Operations
IPV4_SECURE_UNICAST

Service supports IPv4 secure unicast and IPv6 secure unicast over TLS (mTLS per policy).

EDR Response
AMQP Push Service

The interface is used to receive published data via AMQP 1.0 per SWIM TI Yellow Profile Messaging.

PROVIDER_SIDE
Operations
dataDelivery

The IWXXM payload is delivered directly in the AMQP message or via reference to an EDR resource.

Idempotent
NON_IDEMPOTENT
Operation Message
dataDelivery
AMQPBrokerNAMCON

Connection for AMQP 1.0 notifications and payload delivery according to the consumer’s connection for all NAMCON countries, hosted by FMI. Contact FMI Aviation Customer Service via e-mail for credentials and details.

Url

amqps://namcon-swim-broker.fmi.fi:5671

AMQP_MESSAGING

Binding aligned with EUROCONTROL SWIM Technical Infrastructure Yellow Profile (Messaging).

IPV4_SECURE_UNICAST

Service supports IPv4 secure unicast and IPv6 secure unicast over TLS (mTLS per policy).

dataDelivery
References
Revision Save Date
Fri, 12/19/2025 - 14:39
Schema version
v2