# A2100AX satellite bus 3D model

> Shape built from published dimensions and the maker’s renders; details estimated.

Free 3D model of A2100AX satellite bus, a satellite, built from published dimensions by Space Radar. 16,354 triangles, 117 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Communications
- **Triangles:** 16,354
- **File:** bus-a2100ax.glb, 117 kB, glTF 2.0 binary (meshopt)
- **Look:** Physically based
- **Size:** 27 m across
- **Made:** Built from dimensions
- **Added:** 2026-11-08
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/bus-a2100ax.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/bus-a2100ax.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=bus-a2100ax
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** A2100AX satellite bus 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/bus-a2100ax/

## 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 (McDowell's GCAT, Wikipedia, the makers' figures); layout read from the makers' renders, looked at only.

built by this project in code (tools/bus-builder, release 2.0.0 batch m4-buses) from published sizes, with the maker's renders and the photographs under `references` LOOKED AT ONLY; no image-to-3D model was used and no published mesh (NASA 3D Resources has none of this bus; scripts/check-model-sources.py, 2026-11-07)

## Dimensions

- Body x: 2.2 m
- Body y: 2.5 m
- Body z: 4.9 m
- Span: 26.9 m
- Width: 8.9 m
- Reflector: 3 m

Source: GCAT, the A2100AX and AXS satellites: Length 4.5 to 7.7 m (median 6.0), Diameter 1.8 to 3.6 (median 2.5), Span 21 to 27 m (median 26.9); JCSAT-3A 27 x 9 m deployed (Wikipedia, read 2026-11-07). Drawn: a body 2.2 x 2.5 x 4.9 m (6.0 m with the deck tower), 26.9 m over the wings, 8.9 m over the reflectors. OURS (ESTIMATED): the reflectors' 3.0 m (from the 9 m width) and the deck reflector's 1.5 m with their arms and tilts, four panels of 2.6 x 2.55 m a wing, the 2.2 m yoke and the stand-off struts, the horns and feeds, the radiator tile pattern.

## References

- [AMC-15 (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/amc-15.htm), Lockheed Martin, via Gunter's Space Page (Gunter D. Krebs) (copyright Lockheed Martin (a maker's render; looked at only, no part of it is in a file))
- [Astra 1KR (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/astra-1kr.htm), Lockheed Martin, via Gunter's Space Page (Gunter D. Krebs) (copyright Lockheed Martin (a maker's render; looked at only, no part of it is in a file))
- [Astra 1L (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/astra-1l.htm), Lockheed Martin, via Gunter's Space Page (Gunter D. Krebs) (copyright Lockheed Martin (a maker's render; looked at only, no part of it is in a file))
- [GE-1A (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/ge-1a.htm), Lockheed Martin, via Gunter's Space Page (Gunter D. Krebs) (copyright Lockheed Martin (a maker's render; looked at only, no part of it is in a file))
- [Wikipedia: JCSAT-3A](https://en.wikipedia.org/wiki/JCSAT-3A), Wikipedia contributors (CC BY-SA 4.0 (the infobox's numbers are facts; nothing else is copied))
- [Wikipedia: A2100](https://en.wikipedia.org/wiki/A2100), Wikipedia contributors (CC BY-SA 4.0 (the infobox's numbers are facts; nothing else is copied))
- [General Catalog of Artificial Space Objects (GCAT), satcat.tsv of 2026-11-07](https://planet4589.org/space/gcat/tsv/cat/satcat.tsv), Jonathan C. McDowell (CC BY 4.0 (the catalogue's own statement))