# Envisat 3D model

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

Free 3D model of Envisat, a satellite, built from published dimensions by Space Radar. 10,720 triangles, 60 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Earth observation
- **Triangles:** 10,720
- **File:** envisat.glb, 60 kB, glTF 2.0 binary (meshopt)
- **Look:** Flat colours
- **Size:** 26 m across
- **Made:** Built from dimensions
- **Added:** 2026-10-14
- **NORAD:** 27386
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/envisat.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/envisat.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=envisat
- **On the live map:** https://www.spaceradar.ai/#at=sat-27386
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** Envisat 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/envisat/

## 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 photograph of the full-size model of Envisat by abrev (public domain).

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

- Launch length: 10.5 m
- Launch envelope diameter: 4.57 m
- In orbit length: 26 m
- In orbit width: 10 m
- Solar panel long: 14 m
- Solar panel wide: 5 m
- Asar long: 10 m
- Asar wide: 1.3 m
- Ka mast: 2 m
- Ka dish: 0.9 m
- Ra2 dish: 1.2 m

Source: eoPortal, https://www.eoportal.org/satellite-missions/envisat, OPENED 2026-10-14: 'S/C dimensions - Launch configuration: 10.5 m length; 4.57 m envelope diameter - In-orbit configuration: 26 m (total length with solar array) x 10 m x 5 m'; '6.5 kW (EOL) with single-sided solar arrays, size of solar panel: 5 m x 14 m'; 'EnviSat consisted of the Polar Platform ( PPF ) bus and the payload complement.'; 'The SM was derived from the SPOT Maverick-II (Mk-II) bus design, built around a Carbon Fibre Reinforced Plastic (CFRP) cone as the primary structure with a launcher interface at one end and the propulsion module at the other.'; 'The structure of the PLM consists of a 1.2 m diameter CFRP tube and a set of CFRP sandwich panels, forming the webs and external faces of the PLM box. The structure is conceived as a stack of four bays, each 1.6 m high.'; 'The PLM features externally mounted antennas (of ASAR and RA-2) and the following instruments (MERIS, MIPAS, GOMOS optical assembly, SCIAMACHY, MWR, and DORIS) on a payload carrier.'; 'Once deployed, the array is rotated to point continuously towards the sun using a solar-array drive mechanism, which is attached to the base of the central cone.'; 'The ASAR active antenna is a phased array of size 1.3 m x 10 m'; '10 m x 1.3 m (consisting of five 1.3 m x 2 m panels)'; 'The antenna array contains 20 tiles (each 1 m x 0.65 m in size)'; 'The assembly uses a 2 m deployable mast located on the opposite side of the satellite to the Earth. The mast is equipped with an azimuth and elevation pointing mechanism, which steers a 90 cm-diameter Cassegrain antenna pointed to the ARTEMIS satellite.'; MERIS: 'Instrument mass, power, size 200 kg, 175 W (average), 1.8 m x 0.9 m x 1.0 m'; RA-2: 'Antenna diameter, beamwidth 1.2 m'; 'LRR is mounted on the nadir panel close to the RA-2 antenna'; MWR: 'The antenna subsystem includes a 60 cm reflector'; 'The Local Time on Descending Node (LTDN) was at 1000 hours'; 'April 8, 2012: Contact with EnviSat was unexpectedly lost'; 'May 9, 2012: ESA declared the end of the EnviSat mission.' HOW THE THREE NUMBERS OF THE IN-ORBIT SIZE ARE READ (ours): 26 m is the body's 10.5 m, the 0.3 m that stands on its far end, a 1.2 m arm and the 14 m wing, end to end, as the page's own words 'total length with solar array' say; 10 m is the ASAR antenna, which lies ACROSS the body; 5 m is the wing's width. READ OFF THE PUBLIC-DOMAIN PHOTOGRAPH of the full-size model: the antenna across the body on its Earth face, standing off it, its Earth side dark; the wing beyond the service module's end; the instruments as silver boxes on a gold-orange body; three cylinders on the far end; two white dishes on the Earth face. OURS: the body's section (2.8 x 2.2 m); where each instrument stands and every box that is not MERIS; where along the body the antenna crosses it and where the Ka-band mast stands; fourteen 1 m sections of the wing; the wing's arm. NOT FOUND on the page: the body's width, the wing's panel count.

## References

- [Envisatmod](https://commons.wikimedia.org/wiki/File:Envisatmod.jpg), abrev (Wikimedia Commons) (Public domain (released by its author, the Commons user abrev: 'Model of Envisat in original size'; the Commons API's LicenseShortName, read 2026-10-14))