Xue dataset dataset.ringsaturn.me/xue/

The data root of Xue, a static-site weather viewer: live forecast runs, radar and satellite windows and three point products, published as Zarr v3 stores and plain JSON and described by a static STAC 1.1.0 catalog. Everything here is served as-is from an object store; there is no API.

Start here

catalog.json: The root Catalog: one child Collection per live source and point product, one for the historical showcase cases. Each Collection's item link is the newest run or issue at a path that never changes; every link is relative.
docs/stac.md: The catalog's contract: the layout, what each Catalog, Collection and Item carries, and how every document is derived from a run's manifest.
docs/zarr-profile.md: The Zarr v3 profile of a store (<bundle>.zarr/): one uint8 array per variable, one shard, six-frame time chunks, CF scaling attributes, so xarray.open_zarr reads it.
docs/format.md: The quantization, codebooks and temporal residual coding behind the stores (the .xue container they are derived from).
Point products: docs/sounding.md (radiosonde soundings), docs/airport.md (METAR / TAF) and docs/tc.md (tropical cyclone tracks): each issue is an index.json plus one NDJSON file read by byte range.
README: The project, the sources and their cadence, publishing, and the data licences.

Reading it

With pystac and xarray:

import pystac, xarray as xr

catalog = pystac.Catalog.from_file("https://dataset.ringsaturn.me/xue/catalog.json")
run = next(catalog.get_child("gfs").get_items())    # the live Item, gfs/item.json
ds = xr.open_zarr(run.assets["tmp2m"].get_absolute_href())

run.properties["cube:variables"] lists what else the run carries and in which unit. Only the newest run per source is kept, so hold an Item no longer than the source's cadence; a link into a run directory (gfs.<run>/) stops resolving when the run is pruned.

Collections

The live column is read from each Collection with JavaScript.

Collection	Live	Covers (UTC)	Links
NOAA GFS 0.25°
ECMWF IFS open data 0.25°
ECMWF AIFS Single open data 0.25°
ECMWF IFS HRES 0.1° (via Open-Meteo)
NOAA GFS surface fluxes
NOAA HRRR 3 km
NOAA GEFS-Aerosols 0.25°
NCEP CFSv2 seasonal
CMA radar mosaic
NOAA MRMS radar mosaic
JMA precipitation nowcast (hrpns)
Himawari-9 AHI full disk
GOES-19 ABI full disk
GOES-18 ABI full disk
Meteosat-12 FCI full disk, hourly
Radiosonde soundings (WIS2)
Airport observations and forecasts (METAR / TAF)
Tropical cyclone tracks
Xue showcase cases			showcase.json

Layout

latest.json, latest-<source>.json: The live pointer per source, the only mutable object the viewer reads (no-cache); its STAC face is <source>/collection.json.
<source>.<run>/: One immutable run: manifest.json, one <bundle>.zarr/ store per variable with its reduced tiers, posters, and item.json. A rolling window (radar, satellite) adds a round directory, <HHMM>/.
<product>.<issue>/: One issue of a point product: index.json, the NDJSON file it indexes by byte offset, and item.json.
showcase/, showcase.json: Historical cases, kept indefinitely, with their own Collection.

Licences

The data belongs to its producers; each Collection names them under providers and its terms under license, as listed here. Xue's own code is MIT OR Apache-2.0.

NOAA GFS 0.25°: NOAA open data dissemination
ECMWF IFS open data 0.25°: CC-BY-4.0
ECMWF AIFS Single open data 0.25°: CC-BY-4.0
ECMWF IFS HRES 0.1° (via Open-Meteo): CC-BY-4.0
NOAA GFS surface fluxes: NOAA open data dissemination
NOAA HRRR 3 km: NOAA open data dissemination
NOAA GEFS-Aerosols 0.25°: NOAA open data dissemination
NCEP CFSv2 seasonal: NOAA open data dissemination
CMA radar mosaic: the producer's own terms; see the Collection's providers
NOAA MRMS radar mosaic: NOAA open data dissemination
JMA precipitation nowcast (hrpns): 気象庁ホームページ利用規約 (compatible with CC BY 4.0)
Himawari-9 AHI full disk: NOAA Himawari on AWS: terms of use (attribution required, no endorsement)
GOES-19 ABI full disk: NOAA GOES on AWS: terms of use (attribution requested, no endorsement)
GOES-18 ABI full disk: NOAA GOES on AWS: terms of use (attribution requested, no endorsement)
Meteosat-12 FCI full disk, hourly: CC-BY-4.0
Radiosonde soundings (WIS2): WMO Unified Data Policy (Resolution 1, Cg-Ext(2021)): core data, free and unrestricted, attribution of the original source requested
Airport observations and forecasts (METAR / TAF): NWS disclaimer: a work of the US government, in the public domain
Tropical cyclone tracks: NWS disclaimer: the US agencies' products are works of the US government, in the public domain; Creative Commons Attribution 4.0, for the ECMWF open data tracks