FIS-B

AcronymDefinition
FIS-BFlight Information Services - Broadcast
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FIS-B uses ground-based transceivers to establish a data link with universal airborne transceivers, UATs.
Currently 529 ground stations provide FIS-B (and traffic information, TIS-B).
Receiving FIS-B on the ground is unlikely without a nearby ground station.
Now, the addition of FIS-B products further enhances our airborne weather decision making capabilities and choices.
Clearly, FIS-B is cheaper by up to $1200 per year, depending on your data needs.
To better use FIS-B bandwidth, ground stations are organized as cells and configured to serve high-, medium-or low-altitude "tiers" of users.
Service for high-altitude users runs from the surface to 24,000 MSL, the nominal upper limit of FIS-B. This tier serves turbocharged or turbine GA aircraft, and airliners in climb/descent and lower cruise altitudes.
(Aircraft in the flight levels still have to use the airspace below FL180 twice each flight, of course.) You just can't receive FIS-B weather information with a box implementing 1090 ES alone.
A problem with going only with a 1090 ES box is there's no way to receive FIS-B with that technology.