{"station_id":"KTM-001","station_name":"Kathmandu Central Station","location":"Kathmandu","altitude_m":1350.0,"latitude":27.6915,"longitude":85.3205,"timestamp":"2026-06-02T08:00:01.676413Z","temperature_c":25.53,"humidity_rh":41.0,"pressure_hpa":863.2,"pm2_5":22.2,"pm10":36.8,"co2_ppm":422.4,"quality_flag":"ok"}