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JAXA

Visualizing the Flight of Japan’s H3 Rocket

Takram was responsible for the design and development of the H3 Flight Status Indication System for Public (H3 FIP)—a real-time visualization platform that tracks the flight of Japan’s next-generation H3 rocket. Installed at JAXA’s Tanegashima Space Center, the system was featured in the live broadcast of the H3 rocket launch.

Translating Telemetry into an Intuitive Flight Experience

Developed as the successor to the H-IIA, the H3 rocket serves as Japan’s new flagship launch vehicle. The H3 FIP was designed to deliver accurate, high-quality updates on the rocket’s flight status in real time, helping viewers follow the launch as it unfolds.

By receiving telemetry directly from the rocket, the system visualizes both numerical data—such as velocity and altitude—and spatial data like planned trajectories and actual flight paths. This allows audiences to grasp complex technical information through a clear, intuitive visual interface.

Leveraging modern web technologies such as WebGL and WebSocket, the system was built using TypeScript, React, Cesium, and Three.js.

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This simulation illustrates a launch into a sun-synchronous orbit (SSO).

The actual trajectory is shown as a dark solid line, while the planned trajectory is represented by a lighter solid line.

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At lower altitudes, the Earth's surface is visualized using a map overlay—providing contextual geographic reference.
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At the top of the screen, a countdown to X-time is displayed alongside a timeline of key rocket events, such as engine ignitions. These events are also marked directly on the flight path, complete with their respective timestamps and positions.
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Another simulation demonstrates a launch into a geostationary transfer orbit (GTO). Trajectories at lower altitudes are displayed using the Earth-Centered Earth-Fixed (ECEF) coordinate system.
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At higher altitudes, the system switches to the Earth-Centered Inertial (ECI) frame to reflect inertial dynamics.
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On the night side of Earth, enhanced city lights and soft atmospheric scattering are used to provide visual depth and clarity.
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The Earth is rendered as a multilayered composition—featuring terrain, ocean surfaces, night lights, cloud cover, and atmospheric effects.

Project Information

Project Team

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Shota Matsuda
Design Engineer, Project Director

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