{
  "type": "Collection",
  "stac_version": "1.1.0",
  "stac_extensions": [],
  "id": "sounding",
  "title": "Radiosonde soundings (WIS2)",
  "description": "The world's radiosonde ascents, aggregated every hour from the TEMP bulletins the national meteorological services exchange over the WMO Information System: one station per line of a single NDJSON file, spanned by the index beside it, each ascent thinned to the classical mandatory and significant levels in fixed point with four derived quantities. A rolling window with no fixed start — only the newest issue is published, and a station carries its newest four nominal times.",
  "license": "other",
  "keywords": [
    "weather",
    "observation",
    "radiosonde",
    "sounding",
    "upper air",
    "wis2"
  ],
  "providers": [
    {
      "name": "WMO WIS2 Global Cache",
      "description": "The GTS-to-WIS2 gateways run by the Japan Meteorological Agency and the Deutscher Wetterdienst, which republish every centre's bulletins.",
      "roles": [
        "producer"
      ],
      "url": "https://wis2.wmo.int/"
    },
    {
      "name": "The originating national meteorological and hydrological services",
      "description": "Every ascent is theirs; attribution of the original source is requested.",
      "roles": [
        "producer",
        "licensor"
      ],
      "url": "https://community.wmo.int/en/members"
    },
    {
      "name": "Xue",
      "roles": [
        "processor",
        "host"
      ],
      "url": "https://github.com/ringsaturn/xue"
    }
  ],
  "extent": {
    "spatial": {
      "bbox": [
        [
          -180.0,
          -90.0,
          180.0,
          90.0
        ]
      ]
    },
    "temporal": {
      "interval": [
        [
          null,
          null
        ]
      ]
    }
  },
  "xue:pointer": "latest-sounding.json",
  "xue:live": "sounding.2026092419",
  "links": [
    {
      "rel": "root",
      "href": "../catalog.json",
      "type": "application/json"
    },
    {
      "rel": "parent",
      "href": "../catalog.json",
      "type": "application/json"
    },
    {
      "rel": "item",
      "href": "item.json",
      "type": "application/geo+json",
      "title": "Radiosonde soundings (WIS2) · 2026-09-24 19Z issue"
    },
    {
      "rel": "latest-version",
      "href": "item.json",
      "type": "application/geo+json",
      "title": "Radiosonde soundings (WIS2) · 2026-09-24 19Z issue"
    },
    {
      "rel": "alternate",
      "href": "../sounding.2026092419/item.json",
      "type": "application/geo+json",
      "title": "Radiosonde soundings (WIS2) · 2026-09-24 19Z issue (beside its index; gone when the issue is)"
    },
    {
      "rel": "xue:pointer",
      "href": "../latest-sounding.json",
      "type": "application/json",
      "title": "live pointer (schema v1)"
    },
    {
      "rel": "describedby",
      "href": "https://github.com/ringsaturn/xue/blob/main/docs/sounding.md",
      "type": "text/markdown",
      "title": "The sounding product, schema v1"
    },
    {
      "rel": "license",
      "href": "https://library.wmo.int/idurl/4/58009",
      "type": "text/html",
      "title": "WMO Unified Data Policy (Resolution 1, Cg-Ext(2021)): core data, free and unrestricted, attribution of the original source requested"
    }
  ]
}