# Biomass 3D model

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

Free 3D model of Biomass, a satellite, built from published dimensions by Space Radar. 10,210 triangles, 94 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Earth observation
- **Triangles:** 10,210
- **File:** biomass.glb, 94 kB, glTF 2.0 binary (meshopt)
- **Look:** Physically based
- **Size:** 12 m across
- **Made:** Built from dimensions
- **Added:** 2026-10-21
- **NORAD:** 63772
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/biomass.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/biomass.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=biomass
- **On the live map:** https://www.spaceradar.ai/#at=sat-63772
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** Biomass 3D model by Space Radar (spaceradar.ai), MIT License

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

## 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 ESA's and eoPortal's published dimensions; compared with ESA's pictures (CC BY-SA 3.0 IGO).

built by this project in code (release 1.3.0 stage W3-b's part library, lib.py and parts.py, and one script a craft, kept with the stage's notes in ~/space-radar-handoff/release-1.3/W3-b/build), from the cited dimensions and the pictures under `references`; no image-to-3D model was used, and no published mesh: NASA's 3D Resources and NASA Science have none of these craft; ESA publishes no model of them under terms that allow a derivative (its multimedia terms, the ESA Standard Licence, allow use for information and education, not an altered model); EUMETSAT publishes none (read 2026-10-20)

## Dimensions

- Reflector: 12 m
- Boom: 7.5 m
- Focal: 7.8 m
- Array: 6.8 m²

Source: eoPortal, Biomass, https://www.eoportal.org/satellite-missions/biomass, OPENED 2026-10-20: '12 m circular projected aperture', the feed 'a 3 x 2 array of cavity-backed circular microstrip radiators, mounted on the -Y wall at the lower end of the satellite', 'Two pairs of radiators (upper and lower) are fed separately'. ESA, Biomass, The satellite, https://www.esa.int/Applications/Observing_the_Earth/FutureEO/Biomass/The_satellite, OPENED 2026-10-20: the reflector 'just over 12 m across', '7.5-metre-long' boom, 'a three-piece boom', '6.8 m2 triple junction GaAs cells', the focal length '7.8 m'. eoPortal says 3 x 2 radiators; ESA's photograph of the flight model in the anechoic chamber shows two by two on the wall: we built two by two (the two fed pairs). OURS: the bus 1.3 by 1.2 by 3.4 m (read off the photographs against the people beside it), nine ribs (counted off ESA's pictures; the satellite's own picture of the opened reflector shows eight clearly), the reflector's tilt, the wing's panels 0.98 by 2.05 m, the 7.54 m the boom is drawn

## References

- [Biomass in orbit](https://www.esa.int/ESA_Multimedia/Images/2025/02/Biomass_in_orbit), ESA, CC BY-SA 3.0 IGO (CC BY-SA 3.0 IGO (ESA's page, read 2026-10-20))
- [Rolling Biomass to the cleanroom ESA507406](https://commons.wikimedia.org/wiki/File:Rolling_Biomass_to_the_cleanroom_ESA507406.jpg), ESA, CC BY-SA 3.0 IGO (CC BY-SA 3.0 IGO (European Space Agency; Commons' LicenseShortName, read 2026-10-20))
- [Biomass in the anechoic chamber](https://www.esa.int/ESA_Multimedia/Images/2025/02/Biomass_in_the_anechoic_chamber), ESA (ESA Standard Licence; looked at only)
- [Biomass antenna reflector deployed](https://www.esa.int/ESA_Multimedia/Images/2025/05/Biomass_antenna_reflector_deployed), ESA (ESA Standard Licence; looked at only)