atc2metOPEN ATMOSPHERIC DATA

1090 MHzMODE-S EHSRESEARCH DATA

Air traffic
becomes weather.

対地・対気速度ベクトルから風を、
真対気速度とマッハ数から気温を推定。

atc2met receives Mode-S and ADS-B messages from aircraft and estimates horizontal wind from ground and air velocity vectors. Temperature is derived from true airspeed and Mach. Daily v2 files contain means, counts, within-bin variability and processing metadata.

Open Quick look How it works
00–12 km
pressure altitude
10 min
time resolution
H3 r5
canonical grid
OBSERVED ATMOSPHEREV2

Loading shared observation window…

Select a coverage tile to centre the globe and inspect that receiver.

SELECTED RECEIVERNo observed receiver selected

Receiver globe

通常は1本指でページをスクロール

Drag to rotate · tap a receiver · height exaggerated

H3 detail needs an observed receiver in this window.

Time and selected-cell controls

Receiver-wide summary · all observed H3 cells

Loading published observations…

TemperatureNo observationsWind speedNo observationsWind fromNo observations

Accepted-sample-weighted regional summaries use all observed H3 cells in 1 km altitude layers. The selected H3 cell values above retain 250 m bins. Both use the same UTC window; missing observations stay empty.

Source products remain at 10-minute resolution. Windows align within one UTC date; 24:00 is 00:00 on the following day. No observations from another date are substituted.

Loading published observations…

Daily products are generated separately; the 5-minute check does not generate new observations.

Map: Natural Earth
WIND U / VTEMPERATUREAIRCRAFT BIN COUNTSWITHIN-BIN VARIABILITYNETCDF-4H3 HEXAGONS

01 / THE IDEA

Meteorological estimates from aircraft radio signals

Aircraft transmit position and flight parameters through Mode-S and ADS-B. Ground receivers collect these messages; processing estimates wind and temperature, applies acceptance criteria, and aggregates accepted samples into daily products.

01

Listen

Compact ground receivers capture Mode-S and ADS-B signals.

1090 MHz radio
02

Decode

Aircraft position, velocity, heading and airspeed are resolved.

Trajectory reconstruction
03

Reconstruct

Subtract air velocity from ground velocity for wind; use true airspeed and Mach for temperature.

Atmospheric retrieval
04

Publish

Accepted observations are grouped by UTC time, pressure altitude and H3 cell.

Daily v2 NetCDF products

02 / QUICK LOOK

View wind and temperature by time and altitude

Compare one to 30 UTC days using time–height sections and H3 pressure-altitude layers. Missing days remain marked. Use the daily inspector for individual cells, values and counts.

Open Quick look

03 / OPEN RESEARCH

Data coverage, sampling and processing history

The v2 product carries its analysis version, site configuration, creation time, sample counts and aircraft-bin counts inside every NetCDF file. The portal exposes that provenance next to the data.

Download v2 productsRead product documentation

atc2met remains a research-stage observing system. Data quality and availability vary with aircraft traffic, receiver coverage and retrieval conditions.