# Sentinel-3 3D model

> Shape built from published dimensions and pictures; details simplified.

Free 3D model of Sentinel-3, a satellite, built from published dimensions by Space Radar. 6,558 triangles, 44 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Earth observation
- **Triangles:** 6,558
- **File:** sentinel-3.glb, 44 kB, glTF 2.0 binary (meshopt)
- **Look:** Flat colours
- **Size:** 3.9 m across
- **Made:** Built from dimensions
- **Added:** 2026-10-14
- **NORAD:** 41335
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/sentinel-3.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/sentinel-3.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=sentinel-3
- **On the live map:** https://www.spaceradar.ai/#at=sat-41335
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** Sentinel-3 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/sentinel-3/

## How it was made

Built in code from published dimensions and photographs, with no image-to-3D generator and no one else’s mesh. 3D model: built by Space Radar from published dimensions and a drawing of Sentinel-3 by SkywalkerPL (CC BY 4.0).

built by this project in code (the private tool model-from-images: assemble.py, from a yaml of primitives), from the cited dimensions and the pictures under `references`; no image-to-3D model was used, and no published mesh (NASA's 3D Resources on GitHub, 1 583 paths read 2026-10-13, has none of this craft; the survey of 2026-10-13 found no agency model of it under usable terms; ESA's own pictures and models were NOT used: ESA's terms forbid derivative works)

## Dimensions

- Bus long: 3.9 m
- Bus wide: 2.2 m
- Bus deep: 2.21 m
- Sral dish: 1.2 m
- Sral focal: 0.43 m
- Mwr reflector: 0.6 m
- Olci long: 1.24 m
- Olci wide: 0.83 m
- Solar array area: 10.5 m²

Source: eoPortal, https://www.eoportal.org/satellite-missions/copernicus-sentinel-3, OPENED 2026-10-14: 'Spacecraft bus dimensions 3.9 m (height) x 2.2 m x 2.21 m'; 'The spacecraft is 3-axis stabilised, with nominal pointing towards the local normal and yaw steering'; 'Passive control with SSM radiators'; 'Solar Array 1 wing, 3 panels , 10.5 m 2 , power of 2300 W EOL'; 'Stepper motor SADM (Solar Array Drive Mechanism)'; 'SRAL antenna: The antenna is made up of a 1.20 m parabolic reflector with a C/Ku dual frequency feed horn placed in a centered configuration at a focal length of about 430 mm. The feed is supported by 3 struts separated by a 120º angle'; of OLCI, 'The instrument mass is ~ 150 kg, a size of 1.24 m x 0.83 m x 1.32 m'; 'The FOV of OLCI is divided between five cameras on a common structure with the calibration assembly.'; 'the FOV (Field of View) is tilted towards the west (~ 12º away from the sun)'; 'SLSTR, consisting of two baffles, a scan mirror, an off-axis parabolic mirror and a folding plane mirror for each telescope (near nadir and backward view)'; of the MWR, 'The radiometer employs a single offset reflector of 60 cm in diameter and two separate feeds for the two channels.'; 'LTDN (Local Time on Descending Node) is at 10:00 hours'. ESA, 'Facts and figures', https://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentinel-3/Facts_and_figures, OPENED 2026-10-14 (words and numbers only): 'Satellite 2.2 m long, 2.2 m wide, 3.7 m high and a mass of 1150 kg (including 130 kg fuel)'; 'Launch date Sentinel-3A: 16 February 2016 Sentinel-3B: 25 April 2018 Sentinel-3C: 15 September 2026'. The two pages differ by 0.2 m in the long side; eoPortal's 3.9 m is built. DERIVED: 10.5 m2 as three panels of 1.5 x 2.33 m; the dish's depth of 0.21 m from its 430 mm focal length. READ OFF THE FREE DRAWING: the body in black blankets; on the Earth face, from one end to the other, the altimeter's dish, a flat spiral antenna and a white antenna, a housing with two curved openings, and a gold reflector on the far corner; the wing of three panels on a long white yoke from the middle of a side, its long side square to the body. OURS: the radiometer's housing and its openings as two arcs of pale tiles; where OLCI's box stands and its five lenses in a row (the real cameras look out through one opening in a fan); the radiators on the sky face; the star trackers; the launch ring's end. NOT FOUND in words: which way the body's length lies to the track.

## References

- [Sentinel-3 spacecraft model](https://commons.wikimedia.org/wiki/File:Sentinel-3_spacecraft_model.svg), SkywalkerPL (Wikimedia Commons) (CC BY 4.0 (SkywalkerPL, own work; the Commons API's LicenseShortName, read 2026-10-14))
- [EUMETSAT – Model of Sentinel-3](https://commons.wikimedia.org/wiki/File:EUMETSAT_%E2%80%93_Model_of_Sentinel-3.jpg), Neq00 (Wikimedia Commons) (CC BY-SA 4.0 (Neq00, own work; read 2026-10-14): share-alike, LOOKED AT ONLY, never fetched by the tool and not on any sheet)