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update README for filters
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Ryan McGuire
2026-06-26 22:37:47 -04:00
parent 84d1ab1401
commit 26d7a2c0b7
1 changed files with 21 additions and 4 deletions
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README.md
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@@ -145,10 +145,27 @@ heavies, _ := c.Aircraft(ctx,
) )
``` ```
Available filters include `WithPosition`, `WithHex`, `WithCallsign`, | Filter Name | Description | Sample Usage |
`WithSquawk`, `WithCategory`, `WithType`, `InEmergency`, `IsMLAT`, |---|---|---|
`MinAltitude`, `MaxAltitude`, `OnGround`, `WithinNM`, `SeenWithin`, `MinRSSI`, | `WithPosition` | Keeps only aircraft that currently report a lat/lon. | `readsb.WithPosition()` |
plus the `Not` and `Any` combinators. | `WithHex` | Keeps aircraft whose ICAO address matches any of the given values. | `readsb.WithHex("A1B2C3", "D4E5F6")` |
| `WithCallsign` | Keeps aircraft whose (trimmed) callsign matches any value. | `readsb.WithCallsign("UAL2350")` |
| `WithSquawk` | Keeps aircraft transmitting any of the given Mode A squawk codes. | `readsb.WithSquawk("7700")` |
| `WithCategory` | Keeps aircraft of any of the given emitter categories. | `readsb.WithCategory(readsb.CatLarge)` |
| `WithType` | Keeps aircraft of any of the given source types. | `readsb.WithType(readsb.TypeMLAT)` |
| `InEmergency` | Keeps only aircraft squawking a non-routine emergency/priority code. | `readsb.InEmergency()` |
| `IsMLAT` | Keeps only aircraft whose position was derived by multilateration. | `readsb.IsMLAT()` |
| `MinAltitude` | Keeps airborne aircraft at or above the given barometric altitude (feet). | `readsb.MinAltitude(30000)` |
| `MaxAltitude` | Keeps aircraft at or below the given barometric altitude (feet); on-ground aircraft always pass. | `readsb.MaxAltitude(10000)` |
| `OnGround` | Keeps only aircraft reporting an on-ground barometric altitude. | `readsb.OnGround()` |
| `MinSpeed` | Keeps aircraft at or above knots, measured by src (GroundSpeed or TrueAirspeed). | `readsb.MinSpeed(200, readsb.GroundSpeed)` |
| `MaxSpeed` | Keeps aircraft with a positive reading at or below knots, measured by src; aircraft with no reading are dropped. | `readsb.MaxSpeed(500, readsb.TrueAirspeed)` |
| `WithinNM` | Keeps aircraft within the given range (nautical miles) of the receiver. | `readsb.WithinNM(30)` |
| `WithinNMOf` | Keeps aircraft whose current position is within nm nautical miles of the given point (decimal degrees). | `readsb.WithinNMOf(40.7, -74.0, 50)` |
| `SeenWithin` | Keeps aircraft heard from within the given duration. | `readsb.SeenWithin(5*time.Minute)` |
| `MinRSSI` | Keeps aircraft whose average signal strength is at or above dbfs (e.g. -24). | `readsb.MinRSSI(-24)` |
| `Not` | Inverts a filter. | `readsb.Not(readsb.OnGround())` |
| `Any` | Keeps aircraft matching at least one of the supplied filters (logical OR). | `readsb.Any(f1, f2)` |
### Streaming ### Streaming