Flight intelligence
The data
speaks for itself
Every aircraft detected over our terrace since May 3, 2026 — ADS-B telemetry combined with real-time acoustic measurements.
How to read it
These numbers are station observations, not official airport totals. They show what crosses this terrace, from one fixed point, using consistent local sensors.
ADS-B telemetry
Sound + vibration peaks
Photo evidence + public log
—
Flights tracked
since May 3, 2026
—
Photos captured
— detection rate
—
Flights today
rush hour: —
—
Flights above 95 dB
cumul. since May 3
Recent detections
Live
Date / Heure
Vol
Compagnie
dB
Expo≥70dB
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Acoustic monitoring
Noise data
for everyone
Real SPL measurements taken at ground level on the terrace facing runway 02. Every pass, every decibel, fully timestamped.
→ Full noise reportAverage dB by hour (today) · SPL
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Day (06h–22h)
Night (22h–06h)
current hour
—
Peak today
—
All-time peak
—
Flights today
—
Rush hour
Noise record
All-time peak— dB
Loudest flight—
Flights >95 dB total—
Avg night dB (this week)—
Reference levels
Normal conversation~60 dB
City traffic~70 dB
ANAC curfew threshold≥ 93 dB
Critical Alert≥ 98.9 dB
Perceptible vibration (ISO 2631) ≈ 1.5 mg
Station location38°45'N · 009°09'W
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Why two numbers
Aircraft noise can be measured two legitimate ways:
1. Lden is the EU / Portugal regulatory standard (Environmental Noise Directive 2002/49/CE, RGR Art. 11) — it averages sound energy over day, evening and night periods, weighting evening and night events more heavily, and is compared against a legal limit of 65dB.
2. Peak + duration is what Lisbon Finals measures directly — how loud each individual pass gets, and how long it stays above 70dB, repeated roughly — times a day.
Neither is "more correct": Lden is the number regulators use to set limits; peak+duration is closer to what a person actually experiences during a single overflight.
1. Lden is the EU / Portugal regulatory standard (Environmental Noise Directive 2002/49/CE, RGR Art. 11) — it averages sound energy over day, evening and night periods, weighting evening and night events more heavily, and is compared against a legal limit of 65dB.
2. Peak + duration is what Lisbon Finals measures directly — how loud each individual pass gets, and how long it stays above 70dB, repeated roughly — times a day.
Neither is "more correct": Lden is the number regulators use to set limits; peak+duration is closer to what a person actually experiences during a single overflight.
EU / Portugal — regulatory standard
✓Complete day · —
Lden
—
dB — legal limit 65 dB
—
Day (07h–20h)—
Evening (20h–23h, +5dB)—
Night (23h–07h, +10dB)—
More info▾
LVA — Italian standard (OpenSky-verified)—
LVA (Livello di Valutazione Aeroportuale) is Italy's national event-based airport noise standard — instead of averaging all ambient sound, it counts and weights individual aircraft noise events. This event-based philosophy isn't unique to Italy: many countries use similar approaches (SEL — Sound Exposure Level, an international ISO standard used by the FAA, ICAO and UK airports; threshold-crossing event counts elsewhere). Italy has simply codified it into this specific national regulation.
All figures on this page are single-day calculations — not the multi-year representative averages official EU strategic noise maps are built from.
Lisbon Finals metric
✓Complete day · —
Peak + Duration
—
dB — average peak per flight
Citizen metric — Lisbon Finals
Flights measured—
Events ≥70dB—
Events <70dB—
Average duration ≥70dB—
Today, still counting
Live · today, still counting
—
dB — loudest single pass, —
—Average peak per flight
—Flights measured
—Events ≥70dB
—Events <70dB
—Average duration ≥70dB
Reading the gap
A single loud pass barely moves a 24-hour Lden average — but it's very much part of the lived experience
below the flight path. That's the point of showing both: Lden tells you what the
regulator sees over a full day; peak + duration tells you what any single overflight actually
sounded like.
Last 7 days · Lden
Date
Day
Evening
Night
Lden
Peak avg
Planes under 70dB
Expo ≥70dB
Temp
Wind dir
Wind
Day-over-day change · Lden & peak avg
Lden
Peak avg
Lden vs the 65dB legal limit
Lden
65dB limit (Art. 11 RGR)
Total exposure ≥70dB trend (minutes)
Wind speed & dominant direction (km/h)
Wind avg
Wind module
Wind
rotation
rotation
Wind direction over the day, split into 8 fixed 3-hour slots (the same convention official weather stations report on), against the real average aircraft heading tracked that slot — so you can see whether the wind was roughly aligned with the approach path or crossing it, alongside the average peak dB for each slot. A steady spell of wind from the north, common here in summer, is what's locally known as the Nortada.
—°
—
Speed—
Temp—
Pressure—
vs heading—
Spread—
Arrivals—
Departures—
Showing —
How to read this
Needle
Circular-mean wind direction per 3h slot, from the raw degree reading (not the 16-point label, which hides in-between values).
Spread
Circular standard deviation: small means steady wind, large means it was actively turning within that slot.
Wind vs heading
Compares the wind against the real average aircraft heading tracked that slot, not a fixed runway bearing, so it stays correct whichever runway end was active that day. A "*" means no flight in that slot had heading data, so it fell back to runway 02/20's own bearing as an approximation.
Traffic
Arrivals/departures come from the same per-flight direction field used elsewhere on the site. Most days here are almost entirely arrivals, but active runway configuration (itself largely wind-driven) occasionally flips a day to mostly departures.
Weather data
Temperature/pressure read "—" before 11 Sep 2026 ~22h: the weather logger only started capturing them that evening, though wind speed/direction go back to 7 Sep.
Regulatory figures (Lden) are pulled directly from
Alessandro Annunziato's SensorGrid network
official calculation for this station. Lisbon Finals also runs its own independent Leq_dn calculation, in professional agreement within ±2dB, used as a fallback estimate on days when the official feed is unavailable, clearly marked as such above.
Official data available since Sept 8, 2026 — still a young dataset, weekly/monthly trend views will follow as more days accumulate.
ANAC regulation monitoring
⚠ Warning
Zone
Operations observed between midnight and 6am are compared against acoustic alert thresholds — an independent record, not an official ruling on infringements. This week's tally:
—
Night flights this week
since Monday
Limit: 91/week
—
Critical Alerts
> 98.9 dB · absolute ban
—
Orange Alerts
95.9–98.9 dB · not an ANAC tier
—
Level 2 Alerts
93–95.9 dB outside allowed slots
ANAC night curfew · 00h–06h · allowed slots in green
00h01h02h03h04h05h
Restricted (00h30–05h00)
Allowed (00h00–00h30 · 05h00–06h00)
Curfew 00:00–06:00
Max 91 movements/week · 26/day. No scheduled flights during the night period.
Noisy Aircraft Ban
Aircraft >98.9 EPNdB (Levels 8 & 16) strictly prohibited at night.
Level 2 Restriction
93–95.9 EPNdB aircraft: only 00:00–00:30 and 05:00–06:00 allowed.
Reverse Thrust Banned
Landing reverse thrust is strictly forbidden except in emergencies.
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