PNT・測位_Time Frequency System Engineer

必須

• Design, evaluation, or operational experience with highly stable oscillators or atomic clocks (TCXO, OCXO, RAFS, Cs/Rb standards, etc.)
• Experience evaluating and analyzing frequency stability (Allan deviation, phase noise, etc.)
• Experience designing and implementing time synchronization or precision time distribution systems (PTP/GNSS time sync, two-way time transfer, etc.)

歓迎

• Experience developing timekeeping and frequency systems for space-borne equipment
• Experience designing and evaluating phase and frequency locked loop circuits
• Knowledge of space-based time comparison and synchronisation techniques (TWSTFT, GNSS, and others)
• Knowledge of design considerations for the space environment (radiation, thermal cycling, etc.)
• Experience preparing technical documents in English or conducting technical negotiations with external contractors
• Willingness to work in a Japanese-language environment for technical documentation and communication

求める人物像

• Deep understanding of the physical behavior of time and frequency, with the ability to trace design choices back to system-level accuracy requirements
• Ability to independently lead technical negotiations with manufacturers and procurement agents to ensure specifications are realized
• Ability to connect domain expertise to timing error budget discussions at the payload system level

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Job Overview

• This position is responsible for the design and development of high-stability timekeeping and frequency systems for satellite-hosted positioning payloads. Through technical evaluation and validation of procured atomic clocks, development of timekeeping control systems, and design of synchronization architectures between the satellite and ground segment, your work will underpin the positioning accuracy delivered by LEO-PNT (Low Earth Orbit Positioning, Navigation, and Timing) and LNSS (Lunar Navigation Satellite System).

Specific Responsibilities

• Design, develop, and verify performance of satellite-hosted timekeeping control systems
• Technically evaluate and support selection of highly stable oscillators such as atomic clocks (TCXO, OCXO, RAFS, Cs/Rb standards, etc.); conduct technical coordination with manufacturers and procurement agents
• Design time and frequency comparison methods (inter-satellite and satellite-ground time synchronization architectures)
• Design and evaluate phase-locked loop (PLL) circuits and frequency distribution circuits
• Consideration and development of timing protocols for ground and space time synchronisation, such as NTP, White Rabbit and others
• Analyze and simulate timekeeping system performance (frequency stability, phase noise, Allan deviation, etc.)
• Contribute technically to the overall payload system timing error budget

Role Opportunities

• Play a central role in timekeeping technology that is the foundation of LEO-PNT and LNSS, among the world's first in the private sector
• Build expertise in the highly specialized field of spaceborne atomic clocks and high-stability oscillators
• Lead technical coordination with manufacturers and procurement agents
• Opportunities to collaborate with government and international partners including JAXA, NASA, and ESA
• Opportunities to participate in and present at international conferences and to publish research

Tools Used

• OS: Windows, Linux
• Precision frequency measurement instruments including frequency counters, phase noise analyzers, and spectrum analyzers
• Time and frequency analysis tools (Allan deviation analysis, etc.)
• Simulation and analysis using Python/MATLAB, etc.
• Code management: GitHub
• Task management: GitHub Projects V2 / GitHub Issues
• AI: ChatGPT Business/Codex, Gemini, NotebookLM Plus, Claude Code, GitHub Copilot, Cognition Devin
• Version control: Git
• PC: Provided based on personal preference