The broadcast and the flow variables used to read different sources: the audio
came from VATSIM while `information` was genATIS() — a random A-Z letter — and
the runway came from genRunway(), a hard-coded list unrelated to the airport.
So the pilot could hear "information Q" and be expected to call "information T".
Both now read the same AtisReport. The frequency list backfills the letter and
broadcast text from it, so an ATIS station always announces an information
letter even when no VATSIM controller is online. QNH and surface wind come from
the same observation, so the controller stops contradicting the ATIS.
A synthesised ATIS is labelled "Simulated ATIS" in the frequency picker rather
than being credited to VATSIM.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
VATSIM is the only ATIS source today, so an airport with no controller online
(EDDF, on the day this was reported) falls back to a raw METAR — which carries
neither an information letter nor a runway in use.
Add shared/utils/atisReport.ts, which turns whatever the live sources returned
into one AtisReport:
vatsim station broadcasting text; letter from atis_code or parsed from the
text; runway parsed from the text
metar no station: letter derived from the observation time, runway from the
headwind component over the published runway ends
fallback no METAR either: letter from the clock, airport's main runway
Deriving the letter from the observation keeps it stable across background
refetches while still advancing once per METAR cycle. Runway selection compares
METAR true wind against OpenAIP trueHeading (no magnetic correction needed) and
honours takeOffOnly/landingOnly ends.
The synthesised broadcast leaves the METAR groups coded, because
normalizeAtisForSpeech() already expands them for TTS.
Also fixes runway extraction for "RUNWAY IN USE 22" — the phrasing German
VATSIM ATIS actually uses, which the previous pattern missed entirely.
Tests run offline against VATSIM/METAR/OpenAIP responses recorded 2026-07-26,
including the EDDC case where the wind-derived runway matches what the live
controller published.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
