# I-3K satellite bus 3D model

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

Free 3D model of I-3K satellite bus, a satellite, built from published dimensions by Space Radar. 14,360 triangles, 107 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Communications
- **Triangles:** 14,360
- **File:** bus-i-3k.glb, 107 kB, glTF 2.0 binary (meshopt)
- **Look:** Physically based
- **Size:** 20 m across
- **Made:** Built from dimensions
- **Added:** 2026-11-08
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/bus-i-3k.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/bus-i-3k.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=bus-i-3k
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** I-3K satellite bus 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/bus-i-3k/

## 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); layout read from the makers' photographs and 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 photographs and the maker's renders under `references` LOOKED AT ONLY; no image-to-3D model was used and no published mesh (NASA 3D Resources has none of this bus)

## Dimensions

- Body x: 1.8 m
- Body y: 2 m
- Body z: 3.1 m
- Span: 20 m
- Reflector: 2.2 m

Source: GCAT, the ten: Length 3.1 m for GSAT-10, 16, 17, 18, 19 and 29 (4.0 to 4.1 for GSAT-8, 15, 24 and 30, with antennas), Diameter 1.7 to 2.0 m (2.3 to 2.5), Span 15.4 to 20 m (25 for GSAT-24 and 30, 37.4 for GSAT-8). Drawn: a box 1.8 x 2.0 x 3.1 m (4.1 m with the deck antennas), 20.0 m over the wings. OURS (ESTIMATED): the reflectors' 2.2 and 1.2 m and their arms and tilts, three near-square panels of 2.2 x 2.5 m a wing (GSAT-30 photograph, GSAT-10 render), the yoke.

## References

- [GSAT-19 in Clean Room at SDSC SHAR.jpg](https://commons.wikimedia.org/wiki/File:GSAT-19_in_Clean_Room_at_SDSC_SHAR.jpg), ISRO (GODL-India (ISRO; Commons LicenseShortName, read 2026-11-07) (Commons LicenseShortName, read 2026-11-07))
- [GSAT-19 Undergoing Test at Compact Antenna Test Facility.jpg](https://commons.wikimedia.org/wiki/File:GSAT-19_Undergoing_Test_at_Compact_Antenna_Test_Facility.jpg), ISRO (GODL-India (ISRO; Commons LicenseShortName, read 2026-11-07) (Commons LicenseShortName, read 2026-11-07))
- [GSAT-30 in cleanroom with deployed reflector.jpg](https://commons.wikimedia.org/wiki/File:GSAT-30_in_cleanroom_with_deployed_reflector.jpg), ISRO (GODL-India (ISRO; Commons LicenseShortName, read 2026-11-07) (Commons LicenseShortName, read 2026-11-07))
- [GSAT-30 undergoing solar panel deployment tests..jpg](https://commons.wikimedia.org/wiki/File:GSAT-30_undergoing_solar_panel_deployment_tests..jpg), ISRO (GODL-India (ISRO; Commons LicenseShortName, read 2026-11-07) (Commons LicenseShortName, read 2026-11-07))
- [GSAT-10 (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/gsat-10.htm), ISRO, via Gunter's Space Page (Gunter D. Krebs) (copyright ISRO (a maker's render; looked at only, no part of it is in a file))
- [GSAT-18 (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/gsat-18.htm), ISRO, via Gunter's Space Page (Gunter D. Krebs) (copyright ISRO (a maker's render; looked at only, no part of it is in a file))
- [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))