Spectrum · RF Spectrum Band
ADS-B 1090ES
1090 MHz
1090 MHz Extended Squitter — the Mode S transponder frequency on which most transport-category and many general-aviation aircraft broadcast identity, position, altitude, and velocity as part of ADS-B Out, mandated for most U.S. controlled airspace under 14 CFR 91.225/91.227.
1090 MHz Extended Squitter — the Mode S transponder frequency on which most transport-category and many general-aviation aircraft broadcast identity, position, altitude, and velocity as part of ADS-B Out, mandated for most U.S. controlled airspace under 14 CFR 91.225/91.227.
Band facts
| Field | Value |
|---|---|
| Frequency | 1090 MHz |
| System | Aviation cooperative surveillance |
| Category | ADS-B — Automatic Dependent Surveillance-Broadcast |
| Band class | UHF |
| ITU region | Global — aeronautical radionavigation/SSR allocation, all three ITU Regions |
| Standard | ICAO Annex 10 Volume IV / RTCA DO-260B; 14 CFR 91.225, 91.227 |
Why this band matters
The dominant cooperative-surveillance frequency for crewed and larger cooperative aircraft; forms the public ‘known-traffic’ picture that a broader air picture is built alongside, not from — most small UAS are not required to and do not broadcast on 1090ES.
Sources
Standards & authorities
- ICAO Annex 10 Volume IV / RTCA DO-260B; 14 CFR 91.225, 91.227
Related in spectrum
Frequently asked
What frequency is ADS-B 1090ES?
ADS-B 1090ES operates at 1090 MHz. 1090 MHz Extended Squitter — the Mode S transponder frequency on which most transport-category and many general-aviation aircraft broadcast identity, position, altitude, and velocity as part of ADS-B Out, mandated for most U.S. controlled airspace under 14 CFR 91.225/91.227.
Why does the ADS-B 1090ES band matter?
The dominant cooperative-surveillance frequency for crewed and larger cooperative aircraft; forms the public 'known-traffic' picture that a broader air picture is built alongside, not from — most small UAS are not required to and do not broadcast on 1090ES.