Spectrum · RF Spectrum Band
ADS-B 978 UAT
978 MHz
The Universal Access Transceiver (UAT) link — a U.S.-only alternative ADS-B Out frequency generally used below 18,000 ft MSL by general-aviation aircraft, in place of 1090ES, and required to be paired with a Traffic Information Service–Broadcast (TIS-B) capable receiver to see 1090ES traffic.
The Universal Access Transceiver (UAT) link — a U.S.-only alternative ADS-B Out frequency generally used below 18,000 ft MSL by general-aviation aircraft, in place of 1090ES, and required to be paired with a Traffic Information Service–Broadcast (TIS-B) capable receiver to see 1090ES traffic.
Band facts
| Field | Value |
|---|---|
| Frequency | 978 MHz |
| System | Aviation cooperative surveillance |
| Category | ADS-B — Automatic Dependent Surveillance-Broadcast |
| Band class | UHF |
| ITU region | United States only — a U.S.-specific alternative ADS-B link; other states use 1090ES exclusively |
| Standard | RTCA DO-282B; 14 CFR 91.225, 91.227 |
Why this band matters
A second cooperative-surveillance link that exists only in U.S. airspace; relevant to any airspace picture built specifically for U.S. operations alongside 1090ES.
Sources
Standards & authorities
- RTCA DO-282B; 14 CFR 91.225, 91.227
Related in spectrum
Frequently asked
What frequency is ADS-B 978 UAT?
ADS-B 978 UAT operates at 978 MHz. The Universal Access Transceiver (UAT) link — a U.S.-only alternative ADS-B Out frequency generally used below 18,000 ft MSL by general-aviation aircraft, in place of 1090ES, and required to be paired with a Traffic Information Service–Broadcast (TIS-B) capable receiver to see 1090ES traffic.
Why does the ADS-B 978 UAT band matter?
A second cooperative-surveillance link that exists only in U.S. airspace; relevant to any airspace picture built specifically for U.S. operations alongside 1090ES.