Space Radar Models
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I-3K satellite bus

Shape built from published dimensions and pictures; details simplified.

Turn it in 3D

I-3K satellite bus, 3D model, three-quarter view

Open the 3D viewer (www.spaceradar.ai).

The viewer loads when you ask: about 700 kB the first time (three.js and the model), much less after.

Pictures 4

  • I-3K satellite bus, three-quarter viewThree-quarter view
  • I-3K satellite bus, from the sideFrom the side
  • I-3K satellite bus, from behindFrom behind
  • I-3K satellite bus, from aboveFrom above

About this model

I-3K satellite bus is one of the 203 3D models Space Radar made itself: a satellite, built in code from published dimensions and photographs, with no image-to-3D generator and no one else’s mesh.

Shape built from published dimensions and pictures; details simplified. It has 14,360 triangles in a 107 kB glTF file, and is 20 m across at full scale.

It is part of the map’s library; no object on the live map is drawn with it today.

Dimensions and their sources

MeasureValue
Body x1.8 m
Body y2 m
Body z3.1 m
Span20 m
Reflector2.2 m

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. (read 2026-11-07)

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.

The full record

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)

Where the map uses it. the 10 GSATs registry/geo-buses.yaml names as ISRO I-3K (I-3000), by catalogue number. A family FORM, not one satellite's payload: the route is `generic`. They wore the SSL-1300 stand-in; forge #117

Licence note. The numbers are facts (GCAT CC BY 4.0, Wikipedia CC BY-SA 4.0); the shape is this project's, under this repository's licence. The photographs and renders named under `references` were LOOKED AT ONLY: no part of any is in a file. NO LOGO AND NO LETTERING is on the mesh.

References 7

What the shape was compared with. None of these pictures is in the file.

  1. GSAT-19 in Clean Room at SDSC SHAR.jpgISROGODL-India (ISRO; Commons LicenseShortName, read 2026-11-07) (Commons LicenseShortName, read 2026-11-07)
  2. GSAT-19 Undergoing Test at Compact Antenna Test Facility.jpgISROGODL-India (ISRO; Commons LicenseShortName, read 2026-11-07) (Commons LicenseShortName, read 2026-11-07)
  3. GSAT-30 in cleanroom with deployed reflector.jpgISROGODL-India (ISRO; Commons LicenseShortName, read 2026-11-07) (Commons LicenseShortName, read 2026-11-07)
  4. GSAT-30 undergoing solar panel deployment tests..jpgISROGODL-India (ISRO; Commons LicenseShortName, read 2026-11-07) (Commons LicenseShortName, read 2026-11-07)
  5. GSAT-10 (Gunter's Space Page)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)
  6. GSAT-18 (Gunter's Space Page)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)
  7. General Catalog of Artificial Space Objects (GCAT), satcat.tsv of 2026-11-07Jonathan C. McDowellCC BY 4.0 (the catalogue's own statement)

Use it

The model is under the MIT licence: use it, change it and share it, in any project, also a paid one. Keep the credit:

I-3K satellite bus 3D model by Space Radar (spaceradar.ai), MIT License

Any glTF 2.0 loader that reads meshopt compression (EXT_meshopt_compression) opens the file: three.js with its MeshoptDecoder, Babylon.js, model-viewer. Tools such as glTF-Transform can write an uncompressed copy.

Or embed the viewer in your page:

<iframe src="https://www.spaceradar.ai/model/?id=bus-i-3k" title="I-3K satellite bus, 3D model by Space Radar" width="600" height="450" loading="lazy" style="border:0;max-width:100%"></iframe>

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