NETWORK / OVERVIEW

European aerodrome network

12 stations3 distribution pathsCurrent snapshot

Monitored stations12Current preview scope

Source paths online3 / 33 paths returning data

Reports aligned11Latest observation key

Needs attention1Difference, lag or incomplete

NETWORK STATE

Latest station events

Snapshot just now

Station	Observation	Paths	Integrity	State
EFHKHelsinki Airport	10/17:20Z	AMN	3/3 fingerprinted	Aligned
EPWAWarsaw Chopin Airport	10/17:30Z	AMN	3/3 fingerprinted	Aligned
LFPBParis–Le Bourget Airport	10/17:30Z	AMN	3/3 fingerprinted	Aligned
EHAMAmsterdam Airport Schiphol	10/17:25Z	AMN	3/3 fingerprinted	Aligned
EGLCLondon City Airport	10/17:20Z	AMN	3/3 fingerprinted	Aligned
LEMDAdolfo Suárez Madrid–Barajas Airport	10/17:30Z	AMN	3/3 fingerprinted	Aligned
LTACAnkara Esenboğa Airport	10/17:20Z	AMN	3/3 fingerprinted	Content difference
LIMCMilan Malpensa Airport	10/17:20Z	AMN	3/3 fingerprinted	Aligned
ESSAStockholm Arlanda Airport	10/17:20Z	AMN	3/3 fingerprinted	Aligned
EDDFFrankfurt Airport	10/17:20Z	AMN	3/3 fingerprinted	Aligned
LOWWVienna International Airport	10/17:20Z	AMN	3/3 fingerprinted	Aligned
EIDWDublin Airport	10/17:30Z	AMN	3/3 fingerprinted	Aligned

ESSA

Sweden

Stockholm Arlanda Airport

AlignedAll available paths show the same observation time and canonical TAC content.

Permanent station page

NORMALIZED EVENT

METAR.OBSERVED

preview_399572dc1dfa

Station: ESSA
Observed at: 10 Nov 17:20:00Z
Snapshot collected: 10 Nov 17:48:45Z
Revision: Current snapshot
Available paths: 3 / 3
Integrity: Aligned

Exact TAC / selected representationMETAR ESSA 101720Z 21003KT 9999 BKN014 03/02 Q1006 TEMPO BKN009

SHA-256399572dc1dfa4f584862f70108433746fe69a17b1fda066d4390d528ffb8373a

SOURCE TRACE

Captured evidence

UTC

Aviation Weather Center Data APIAWC receiptTime (report-specific)
10 Nov 17:26:07Z
MET Norway TafmetarHTTP Last-Modified (response-wide)
10 Nov 17:48:45Z
NWS TGFTP station filesHTTP Last-Modified (station file)
10 Nov 17:24:13Z

SOURCE INTEGRITY

Evidence behind the event

All available paths show the same observation time and canonical TAC content.

Path	Observation	Source timestamp	Fingerprint	Result
Aviation Weather Center Data API	10/17:20Z	10 Nov 17:26:07Z	`399572dc1dfa4f584862f70108433746fe69a17b1fda066d4390d528ffb8373a`	Captured
MET Norway Tafmetar	10/17:20Z	10 Nov 17:48:45Z	`78b17900621d15ff9f1f97bf5a4437cadcaf9b51c7ff9096b9cf17c293eea651`	Captured
NWS TGFTP station files	10/17:20Z	10 Nov 17:24:13Z	`c5748b0f77b27f28022a84ab1096ef181dad7fb34831d61f9f1db347843c7174`	Captured

EVENTS / CURRENT SNAPSHOT

Evidence and conditions

Preview logic

EVENT MODEL / CURRENT SNAPSHOT

Every current condition stays explicit

ESSA

10 Nov 17:48:45Z
Snapshot integrity classified
Current state: Aligned.

AUTOMATION / PLANNED

Turn a condition into a signal

Controls are illustrative

ALERT RULES

Workspace routing

Not armed

01

Expected report missingSignal when no new observation is visible after its expected window.

120 sec

02

Source content divergesSignal when meaningful TAC tokens differ for one observation key.

Any path

03

Correction presentEmit an event when COR is present in captured current-snapshot evidence.

Immediate

RETENTION + INTEGRITY

Evidence survives normalization

Planned

01
Original representationExact current TAC remains attached to its source provenance.
Inspect
02
Revision chainNIL, AUTO, SPECI and COR remain explicit in the planned history model.
Planned
03
Content identitySHA-256 fingerprints expose selected-string identity.
Verifiable
04
Retention policyLicence-aware workspace controls.
To be set