Moist-air density

Αποσπάσματα κώδικα

curl "https://api.oanor.com/hotairballoon-api/v1/air-density" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/hotairballoon-api/v1/air-density", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/hotairballoon-api/v1/air-density");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/hotairballoon-api/v1/air-density",
    headers={"x-oanor-key": "oanor_test_..."}
)

Παράδειγμα απόκρισης

Πραγματική απόκριση αυτού του endpoint, από τον τελευταίο έλεγχο υγείας.

{
    "data": {
        "note": "Air density ρ = (P − 0.378·Pv) ÷ (R·T), where Pv is the water-vapour pressure (relative humidity × the saturation pressure). Counter-intuitively, humid air is LESS dense than dry air at the same temperature and pressure, because a water molecule is lighter than the N₂/O₂ it replaces — so it slightly reduces a balloon's lift and an aircraft's performance. It falls with temperature and rises with pressure.",
        "inputs": {
            "temp_c": 15,
            "pressure_pa": 101325,
            "relative_humidity_pct": 50
        },
        "air_density_kg_m3": 1.2211,
        "dry_air_density_kg_m3": 1.225
    },
    "meta": {
        "timestamp": "2026-06-07T08:18:01.266Z",
        "request_id": "254bad0f-b3a7-43a1-a24e-e2d5bbb83ec3"
    },
    "status": "ok",
    "message": "Air density",
    "success": true
}