58 lines
1.9 KiB
Markdown
58 lines
1.9 KiB
Markdown
# taf
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[](https://goreportcard.com/report/go.elara.ws/taf)
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[](https://pkg.go.dev/go.elara.ws/taf)
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This is a library and command-line tool that parses and decodes [TAF forecasts](https://en.wikipedia.org/wiki/Terminal_aerodrome_forecast).
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TAF stands for Terminal Aerodrome Forecast. It's the weather forecast format used in aviation. TAF reports are useful as a free source of accurate weather.
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Here's an example of a TAF report from JFK airport:
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```
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KJFK 212335Z 2200/2306 33012G18KT P6SM FEW060 BKN250
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FM220300 36014KT P6SM FEW060 SCT150
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FM221400 01015G21KT P6SM SCT060
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FM221900 04011KT P6SM SCT060
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FM230000 03007KT P6SM FEW060
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FM230300 35006KT P6SM FEW060
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```
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Try parsing it by installing the tafparser tool using
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```bash
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go install go.elara.ws/taf/cmd/tafparser@latest
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```
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and then running
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```bash
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tafparser <<EOF
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KJFK 212335Z 2200/2306 33012G18KT P6SM FEW060 BKN250
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FM220300 36014KT P6SM FEW060 SCT150
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FM221400 01015G21KT P6SM SCT060
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FM221900 04011KT P6SM SCT060
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FM230000 03007KT P6SM FEW060
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FM230300 35006KT P6SM FEW060
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EOF
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```
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That should return a JSON object containing all the decoded data from the TAF report.
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You can also give the `tafparser` tool a file to read from using `tafparser file.txt`.
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Units in TAF reports are inconsistent between different countries. `tafparser` can convert the units for you! Just pass it the units you want to use for speed and/or distance like so:
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```bash
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tafparser -s m/s -d m
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```
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This tells `tafparser` to convert all speed units to meters per second and distance units to meters.
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`tafparser` can also fetch TAF reports for you using the [aviationweather.gov](https://aviationweather.gov) site. Use the `-i <identifier>` flag to tell it to do that, like so:
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```bash
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tafparser -i EGLL
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```
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That should automatically fetch the report for London Heathrow and parse it. |