# Himawari 3D model

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

Free 3D model of Himawari, a satellite, built from published dimensions by Space Radar. 5,016 triangles, 33 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Weather and climate
- **Triangles:** 5,016
- **File:** himawari.glb, 33 kB, glTF 2.0 binary (meshopt)
- **Look:** Flat colours
- **Size:** 8.0 m across
- **Made:** Built from dimensions
- **Added:** 2026-10-15
- **NORAD:** 40267, 41836
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/himawari.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/himawari.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=himawari
- **On the live map:** https://www.spaceradar.ai/#at=sat-40267
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** Himawari 3D model by Space Radar (spaceradar.ai), MIT License

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

## 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 (no free picture of the craft).

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 has none of this craft; the survey of 2026-10-13 found no agency model of it under usable terms); no JMA, JAXA or Mitsubishi Electric picture or model is in the file: JMA's sketch of the craft was looked at only, for the layout

## Dimensions

- X: 5.2 m
- Y: 8 m
- Z: 5.3 m
- Power: 2.6 kW

Source: eoPortal, https://www.eoportal.org/satellite-missions/himawari-8-9, OPENED 2026-10-14: 'The Himawari-8 and 9 buses were manufactured by MELCO (Mitsubishi Electric Corporation), according to identical specifications. The spacecraft has dimensions 5.2 x 8.0 x 5.3 m, and a launch mass of approximately 3500 kg.'; 'The Himawari spacecraft is 3-axis stabilized with momentum bias. It features a MELCO DS-2000 bus. The overall size of the deployed spacecraft is 5.2 m (X-axis), 8.0 m (Y-axis), and 5.3 m (Z-axis).'; 'The launch mass is ~3500 kg, and the dry mass is 1300 kg.'; 'EPS (Electrical Power Subsystem): The power generated is 2.6 kW, the bus voltage is 100 V, use of a Li-ion battery.'; 'Ka-band for payload data transmission.'; 'Ku-band for TT&C services.'; 'Attitude sensors: Coarse Sun Sensor, Star Tracker, IRU (Inertial Reference Unit), Gyroscope'. JMA Meteorological Satellite Center, 'Himawari-8/9 Spacecraft Overview', https://www.data.jma.go.jp/mscweb/en/general/himawari.html, OPENED 2026-10-14: 'Each of Himawari-8/9 carries a new unit called the Advanced Himawari Imager (AHI).'; 'The Ka-band is used for downlinking meteorological data, and the Ku-band is used for telemetry and command operations.'; 'Attitude control 3-axis attitude-controlled geostationary satellite'; 'Prime Contractor Mitsubishi Electric Corporation'. LOOKED AT ONLY (JMA's sketch on that page): the labels 'AHI (Advanced Himawari Imager)', 'UHF-band Antenna', 'Ku-band Antenna', 'Star Tracker', 'Imager Bench', 'Ka-band Antenna', 'Solar Array Panel', 'Space Environment Data Acquisition Monitor (SEDA)', the axes Xs, Ys, Zs, one array of two panels on a yoke. OURS: EVERY SIZE INSIDE THE CITED ENVELOPE (the body 2.4 x 2.4 x 3.15 m, AHI's housing, the array's panels of 2.2 x 2.4 m, the yoke, the Ka-band dish of 2.4 m), the colours (the blankets dark, the radiators white, read off JMA's artist's view, looked at only).

## References

- [himawari89_outward](https://www.data.jma.go.jp/mscweb/en/general/himawari.html), Japan Meteorological Agency (JMA's site terms (Government of Japan Standard Terms of Use, said by JMA to be compatible with CC BY 4.0; a third party may hold rights): LOOKED AT ONLY, never fetched by the tool and not on any sheet)