So I tried and found out and my JS/TS/Svelte skills are so poor that I gave up. Anyone skilled enough should be able to take example 03 (boat tracker) and plug the source data to be array "ac" from json downloaded from following URL: "https://opendata.adsb.fi/api/v3/lat/50/lon/14.5/dist/50", which returns following data structure:
{"ac":[]
,"msg": "No error"
,"now": 1772178678001
,"total": 10
,"ctime": 1772178678001
,"ptime": 0
}
"ac" is array of aircraft located in "dist" distance from "lat" and "lon" and wind parameters are "wd" and "ws". Other interresting parameters could be "oat", "alt_baro", "alt_geom" and "nav_qnh".
Hope someone more skilled can use this info to make it happen before I manage to learn Svelte/TS