Credits and licences
Last updated 2026-10-25
Our own code
The calculators, the logbook and the page layouts are written for this site. The pages make no requests to other servers.
Third-party material
The libraries, fonts, icons and data below are copied into the site together with their licence files. Each licence applies to its own material. Regulation text quoted on the pages comes from the official sources named on each page.
| Name | Used for | Licence |
|---|---|---|
| metar-taf-parser 9.1.3 | Reads METAR, SPECI and TAF reports on the METAR decoder and TAF decoder pages. Loaded in your browser when you first use a decoder. | MIT |
| astronomy-engine 2.1.19 (Don Cross) | Sun position for sunrise, sunset, civil twilight and night time | MIT |
| OurAirports airport data (2026-10-25) | Airport names, codes and coordinates for the flight time and airport distance calculators. Loaded in your browser when you first click an airport field. | Public domain |
| U.S. Standard Atmosphere, 1976 (NOAA, NASA, USAF) | Pressure, temperature and density of the standard atmosphere and its constants, used by the density altitude, pressure altitude, true airspeed, altimeter setting and Mach number calculators | Public domain (U.S. Government work) |
| Buck (1996) saturation vapor pressure equation | Water vapor pressure from the dew point in the density altitude calculator (formula, no code taken) | Published formula |