Datasets:

juliensimon
/

constellation-tle-latest

license: cc-by-4.0
pretty_name: Constellation TLEs -- 18 Satellite Constellations
language:
  - en
description: >-
  Daily TLE snapshots for 18 satellite constellations (1,891 satellites) from
  CelesTrak. Covers GNSS, LEO broadband, GEO comms, and Earth observation
  fleets.
task_categories:
  - tabular-regression
tags:
  - space
  - open-data
  - tabular-data
  - parquet
  - satellite
  - tle
  - orbital-mechanics
  - celestrak
  - sgp4
  - gnss
  - gps
  - galileo
  - beidou
  - glonass
  - oneweb
  - iridium
  - constellation
size_categories:
  - 1K<n<10K
configs:
  - config_name: oneweb
    data_files:
      - split: train
        path: data/oneweb.parquet
    default: true
  - config_name: kuiper
    data_files:
      - split: train
        path: data/kuiper.parquet
  - config_name: qianfan
    data_files:
      - split: train
        path: data/qianfan.parquet
  - config_name: hulianwang
    data_files:
      - split: train
        path: data/hulianwang.parquet
  - config_name: iridium
    data_files:
      - split: train
        path: data/iridium.parquet
  - config_name: globalstar
    data_files:
      - split: train
        path: data/globalstar.parquet
  - config_name: orbcomm
    data_files:
      - split: train
        path: data/orbcomm.parquet
  - config_name: planet
    data_files:
      - split: train
        path: data/planet.parquet
  - config_name: spire
    data_files:
      - split: train
        path: data/spire.parquet
  - config_name: gps
    data_files:
      - split: train
        path: data/gps.parquet
  - config_name: galileo
    data_files:
      - split: train
        path: data/galileo.parquet
  - config_name: beidou
    data_files:
      - split: train
        path: data/beidou.parquet
  - config_name: sbas
    data_files:
      - split: train
        path: data/sbas.parquet
  - config_name: ses
    data_files:
      - split: train
        path: data/ses.parquet
  - config_name: intelsat
    data_files:
      - split: train
        path: data/intelsat.parquet
  - config_name: eutelsat
    data_files:
      - split: train
        path: data/eutelsat.parquet
  - config_name: telesat
    data_files:
      - split: train
        path: data/telesat.parquet

Constellation TLEs -- 18 Satellite Constellations

An orbital sunrise illuminates the Earth's atmosphere, seen from the ISS

Credit: NASA

Part of the Orbital Mechanics Datasets collection on Hugging Face.

Dataset description

Daily Two-Line Element (TLE) snapshots for 18 satellite constellations sourced from CelesTrak. Covers GNSS navigation (GPS, Galileo, BeiDou, GLONASS, SBAS), LEO broadband (OneWeb, Kuiper, Qianfan, Hulianwang), LEO communications (Iridium, Globalstar, ORBCOMM), Earth observation (Planet Labs, Spire Global), and GEO communications (SES, Intelsat, Eutelsat, Telesat).

Two-Line Element sets (TLEs) are the standard format for representing satellite orbital elements, developed by NORAD and used universally with the SGP4/SDP4 propagation model. This dataset provides daily-fresh TLEs for every major non-Starlink constellation in orbit, organized by operator for easy access.

Raw .tle files are provided alongside Parquet for maximum compatibility: orbit propagation libraries like python-sgp4, orekit, and STK consume the standard three-line TLE format directly. Because TLE accuracy degrades rapidly (especially for LEO objects), daily updates are essential for operational applications.

Starlink TLEs are published separately in starlink-tle-latest due to the constellation's size (7,000+ satellites).

Constellations

Constellation	Operator	Orbit	Satellites
OneWeb	Eutelsat OneWeb	LEO	651
Kuiper	Amazon	LEO	299
Qianfan (G60)	Shanghai Spacecom	LEO	144
Hulianwang (GuoWang)	China SatNet	LEO	173
Iridium NEXT	Iridium	LEO	80
Globalstar	Globalstar	LEO	28
ORBCOMM	ORBCOMM	LEO	15
Planet Labs	Planet Labs	LEO	134
Spire Global	Spire Global	LEO	86
GPS (NAVSTAR)	USSF	MEO	40
Galileo	EU/ESA	MEO	50
BeiDou	CNSA	MEO/GEO	56
SBAS	Various	GEO	6
SES	SES	GEO	69
Intelsat	Intelsat	GEO	27
Eutelsat	Eutelsat	GEO	28
Telesat	Telesat	GEO/LEO	5

Total: 1,891 satellites -- 1,610 LEO, 146 MEO, 135 GEO

Raw TLE files

For applications that consume standard 3-line TLE format (e.g., SGP4 propagators):

data/oneweb.tle -- OneWeb
data/kuiper.tle -- Kuiper
data/qianfan.tle -- Qianfan (G60)
data/hulianwang.tle -- Hulianwang (GuoWang)
data/iridium.tle -- Iridium NEXT
data/globalstar.tle -- Globalstar
data/orbcomm.tle -- ORBCOMM
data/planet.tle -- Planet Labs
data/spire.tle -- Spire Global
data/gps.tle -- GPS (NAVSTAR)
data/galileo.tle -- Galileo
data/beidou.tle -- BeiDou
data/sbas.tle -- SBAS
data/ses.tle -- SES
data/intelsat.tle -- Intelsat
data/eutelsat.tle -- Eutelsat
data/telesat.tle -- Telesat

Schema (all configs)

Column	Type	Description
`norad_cat_id`	`int64`	NORAD catalog number -- unique integer assigned by US Space Command to every tracked object
`name`	`string`	Satellite name as listed in Space-Track (e.g., 'STARLINK-1234', 'ONEWEB-0012', 'NAVSTAR 78')
`constellation`	`string`	Constellation identifier (e.g., 'starlink', 'oneweb', 'planet', 'galileo')
`line1`	`string`	TLE line 1 (69 characters): satellite number, classification, epoch, first/second derivative of mean motion, BSTAR drag term, element set number
`line2`	`string`	TLE line 2 (69 characters): inclination, RAAN, eccentricity, argument of perigee, mean anomaly, mean motion (rev/day); use with SGP4 propagator
`epoch_utc`	`timestamp[ns, tz=UTC]`	TLE reference epoch in UTC; elements are most accurate within +/-1-2 days of this time

Quick stats

1,891 satellites across 17 constellations
1,610 LEO + 146 MEO + 135 GEO
Snapshot: 2026-05-21 08:46 UTC

Usage

from datasets import load_dataset

# Load a specific constellation
gps = load_dataset("juliensimon/constellation-tle-latest", "gps", split="train")
oneweb = load_dataset("juliensimon/constellation-tle-latest", "oneweb", split="train")

# Use with sgp4 library for orbit propagation
from sgp4.api import Satrec
sat = Satrec.twoline2rv(gps[0]["line1"], gps[0]["line2"])

# Load all GNSS constellations
import pandas as pd
gnss = pd.concat([
    load_dataset("juliensimon/constellation-tle-latest", c, split="train").to_pandas()
    for c in ["gps", "galileo", "beidou", "glonass", "sbas"]
])
print(f"{len(gnss)} GNSS satellites")

# Compare constellation sizes with matplotlib
import matplotlib.pyplot as plt
sizes = {}
for config in ["oneweb", "iridium", "planet", "spire", "gps"]:
    ds = load_dataset("juliensimon/constellation-tle-latest", config, split="train")
    sizes[config] = len(ds)
plt.bar(sizes.keys(), sizes.values())
plt.ylabel("Satellites")
plt.title("Constellation Sizes")
plt.show()

Data source

CelesTrak (Dr. T.S. Kelso), mirroring NORAD/18th Space Defense Squadron data. No authentication required.

Update schedule

Daily at 05:30 UTC via GitHub Actions.

Related datasets

juliensimon/starlink-tle-latest -- Daily Starlink + GPS TLEs
juliensimon/space-track-tle-history -- 238M+ historical TLEs (1959-present)
juliensimon/constellation-census -- Parsed orbital elements with status classification
juliensimon/space-track-satcat -- Complete NORAD satellite catalog
juliensimon/ucs-satellite-database -- Active satellites with purpose and operator metadata

Citation

@dataset{constellation_tle_latest,
  title = {Constellation TLEs -- 18 Satellite Constellations},
  author = {juliensimon},
  year = {2026},
  url = {https://huggingface.co/datasets/juliensimon/constellation-tle-latest},
  publisher = {Hugging Face}
}

License

CC-BY-4.0