# NavIC (IRNSS) 3D model

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

Free 3D model of NavIC (IRNSS), a satellite, built from published dimensions by Space Radar. 6,354 triangles, 38 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Navigation
- **Triangles:** 6,354
- **File:** irnss.glb, 38 kB, glTF 2.0 binary (meshopt)
- **Look:** Flat colours
- **Size:** 2.1 m across
- **Made:** Built from dimensions
- **Added:** 2026-10-13
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/irnss.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/irnss.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=irnss
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** NavIC (IRNSS) 3D model by Space Radar (spaceradar.ai), MIT License

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

## 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 ISRO's published dimensions and drawing of the IRNSS-1 series (ISRO, GODL-India).

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)

## Dimensions

- Bus 1: 1.58 m
- Bus 2: 1.5 m
- Bus 3: 1.5 m
- Solar panel 1: 2.15 m
- Solar panel 2: 1.8 m
- L band array diameter: 1.1 m
- Power: 1660 W

Source: ISRO, 'IRNSS-1A', https://www.isro.gov.in/IRNSS_1A.html, OPENED 2026-10-13: 'Physical Dimensions' '1.58 metre x 1.50 metre x 1.50 metre'; 'Lift-off Mass' '1425 kg'; 'Power' 'Two solar panels generating 1660 W, one lithium-ion battery of 90 Ampere-Hour capacity'; 'Propulsion' '440 Newton Liquid Apogee Mo[tor]'; 'The ranging payload of IRNSS-1A consists of a C-band transponder'; 'IRNSS-1A also carries Corner Cube Retro Reflectors for laser ranging'. eoPortal, https://www.eoportal.org/satellite-missions/irnss, OPENED 2026-10-13: 'Spacecraft size (launch configuration)' '1.58 m x 1.5 m x 1.5 m'; 'The IRNSS satellites are configured around the spacecraft bus I-1K'; 'Attitude control of the satellite is provided with yaw steering, a capability to optimize the use of the solar panels'. URSC (ISRO Satellite Centre), 'Salient features of IRNSS-1A', https://www.ursc.gov.in/navigation/html/irnss-1a.jsp, OPENED 2026-11-04: 'each array with one panels of size 2.15 m x 1.8 m populated with multi-junction solar cells' (a two-sided array: one panel each side), 'Dual Helix Array Antenna (dia. 1.1m) in L5 and S bands', 'Corner Cube Retro Reflector for Laser Ranging', a cuboid of 1450 mm x 1450 mm x 1576 mm. NO PAGE OPENED GIVES THE ARM BETWEEN THE BODY AND THE PANEL OR THE SPAN (ISRO's PSLV-C22 brochure was not found online): OURS: a 0.9 m arm, which makes each wing 3.8 m from the body face and the craft 7.6 m tip to tip; the panels are now the cited 2.15 x 1.8 m, where the first build had an estimate of 1.9 x 1.75 m. READ OFF ISRO'S DRAWING: the round antenna plate on the Earth face with its ring of elements round a middle cluster (the count, sixteen and seven, is ours), the two red horns beside it, the six-sided reflector plate at a corner, the dome on one side face and the nozzle on the opposite one, the yellow blanket.

## References

- [IRNSS Series 1](https://commons.wikimedia.org/wiki/File:IRNSS_Series_1.jpg), Indian Space Research Organisation (ISRO) (GODL-India (Government Open Data License - India; Indian Space Research Organisation, isro.gov.in))