Mode VOR

VOR: your bearing from a navigation beacon, its Morse identification and voice.

Group	Aviation
Default frequency	113 MHz
Default sample rate	2 Msps
In the mode list	Radial, 108-118 MHz

Step-by-step: Tutorial-VOR

What VOR is

VOR beacons (108 to 118 MHz) give aircraft a bearing to or from a ground station, identified by a Morse code ident.

Frequencies and settings

Navigation beacons, 108 - 118 MHz.

Setting	Value
Start frequency	113 MHz
Tuning range of the mode table	74 to 336 MHz
Sample rate asked	2 Msps
Lowest working rate	100 ksps
Channel width	50 kHz

OnAir takes any frequency you type; the numbers above are the mode's starting point and the range its table describes. In the app the shortcut label is Radial, 108-118 MHz.

What OnAir shows

The radial (conventional and Doppler VOR), Morse identification, voice; a position from two stations on the map.

The mode's own tab has these screens: Radial, Fix, Stations. The other tabs (Overview, Receiver, Scan, History) are described on the Main window page.

Tips and caveats

• Checked with generated signals and impairments; recordings of real signals welcome.
• Which radio: Usually yes for narrowband signals: an RTL-SDR tunes roughly 24 MHz to 1.7 GHz at up to about 2.4 Msps. Wide signals such as TV channels need a faster radio, and OnAir says next to the source what the selected radio can do.
• Try it without a radio: most modes include a built-in synthetic test signal, so you can open the screen and try the controls first.
• Receiving and the law: Receiving aircraft broadcasts is legal in many countries, but some restrict listening to or using what you hear. OnAir is a receiver. Check the rules where you live. See Legal.

Related pages

• All modes, Aviation
• Supported radios, Troubleshooting, FAQ
• More in Aviation: ADS-B, Mode S uplink, ACARS, VDL2, VDL4, HFDL, Airband, ILS, NDB, Drone Remote ID, UAT, FLARM, DJI drones