| --- |
| license: cc-by-4.0 |
| pretty_name: Constellation Demo Fleet |
| language: |
| - en |
| tags: |
| - space |
| - satellites |
| - ground-stations |
| - telemetry |
| - link-budget |
| - snr |
| - forecasting |
| size_categories: |
| - n<1K |
| configs: |
| - config_name: links |
| data_files: links.csv |
| default: true |
| - config_name: ground_stations |
| data_files: ground_stations.csv |
| - config_name: satellites |
| data_files: satellites.csv |
| - config_name: demand_pools |
| data_files: demand_pools.csv |
| --- |
| |
| # Constellation Demo Fleet |
|
|
| A ready-made satellite and ground-station fleet from [Constellation Space](https://constellation.space): 6 ground stations, 39 satellites, 21 ground-antenna links with link-budget state, and 4 traffic demand pools. It is the same fleet the Constellation API loads with `load_demo_fleet`, so you can explore it here and then run forecasts on it in the [Constellation Platform](https://platform.constellation.space). |
|
|
| This release is a **snapshot**: each entity's newest values as of `2026-10-10T23:07:10Z`. A time-series release (two hours of 15-second SNR telemetry and seven days of ten-minute demand) will follow. |
|
|
| ## Files |
|
|
| | Config | File | Rows | What it holds | |
| |---|---|---|---| |
| | `links` (default) | `links.csv` | 21 | One ground antenna to one satellite: pointing, geometry, RF configuration, and observed SNR | |
| | `ground_stations` | `ground_stations.csv` | 6 | Station name, WGS84 latitude and longitude, and the demand pool it serves | |
| | `satellites` | `satellites.csv` | 39 | NORAD catalog id and name (O3b, O3b mPOWER, Globalstar, PROBA-2, PROBA-3, Sentinel-1C, BIOMASS) | |
| | `demand_pools` | `demand_pools.csv` | 4 | Latest ten-minute offered traffic per pool | |
| | | `topology.json` | 70 entities | The same snapshot in the shape the API's topology endpoint returns | |
|
|
| ## Columns |
|
|
| ### `links.csv` |
|
|
| | Column | Unit | Meaning | |
| |---|---|---| |
| | `entity_id` | | `<station>__ant<n>`: one antenna at one station | |
| | `source` | | The ground station (`ground_stations.entity_id`) | |
| | `target` | | The satellite (`satellites.entity_id`) | |
| | `observed_at` | UTC | Time of the newest sample | |
| | `azimuth_deg` | degrees | Pointing azimuth, clockwise from true north, in the station's local frame | |
| | `elevation_deg` | degrees | Pointing elevation above the local horizon | |
| | `slant_range_km` | km | Line-of-sight distance from antenna to satellite | |
| | `frequency_ghz` | GHz | Carrier frequency | |
| | `bandwidth_mhz` | MHz | Channel bandwidth | |
| | `eirp_dbw` | dBW | Effective isotropic radiated power of the transmitter | |
| | `g_t_db_k` | dB/K | Receive figure of merit (antenna gain over system noise temperature) | |
| | `snr_db` | dB | Observed signal-to-noise ratio | |
|
|
| ### `ground_stations.csv` |
| |
| `entity_id`, `name`, `lat_deg` and `lon_deg` (WGS84 degrees), and `pop_id`, the demand pool the station serves. |
| |
| ### `demand_pools.csv` |
|
|
| `pool_id`, `interval_start` (UTC, start of a ten-minute interval), `inlet_bytes` (offered bytes in that interval), and `evidence_kind`. |
|
|
| ## Things to know |
|
|
| - **Demand is synthetic.** Every pool row has `evidence_kind = synthetic_offered`: it is generated traffic for exercising demand forecasts, not measured customer traffic. |
| - **Not every link closes.** `SITE-9c5100cd2d6c__ant0` to PROBA-3 sits near 48,800 km slant range at -12.5 dB SNR, which is realistic for a spacecraft near the far point of a highly elliptical orbit and is kept as an example of a link that does not close. |
| - **Links come and go.** Antennas that are not tracking a satellite stop reporting, so `observed_at` varies by link. |
| - **Satellite names and NORAD ids are public catalog identifiers.** |
|
|
| ## Use it |
|
|
| ```python |
| from datasets import load_dataset |
| |
| links = load_dataset("constellationspace/demo-fleet", "links", split="train") |
| print(links.to_pandas().sort_values("snr_db").head()) |
| ``` |
|
|
| Run forecasts on the same fleet with the API (create a key in the [Platform](https://platform.constellation.space), then load the fleet from the Dashboard or an MCP client): |
|
|
| ```bash |
| curl -H "x-api-key: $CONSTELLATION_API_KEY" https://api.constellation.space/topology |
| ``` |
|
|
| ## License |
|
|
| [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Credit "Constellation Space" when you use it. |
|
|
