PNT・測位_Navigation Payload System Engineer

必須

• Practical experience in the field of satellite positioning (GNSS/PNT): involvement in the development or evaluation of a positioning system or its subsystems (navigation payload / receiver / navigation signal / orbit and time determination / correction and monitoring systems, etc.)
• Experience that goes beyond conceptual design to define specifications, design, test, and evaluate at the level of hardware (components/equipment as real units) or the implementation of software-defined receivers and signal processing
• Experience limited to application development that only uses GNSS is out of scope.

歓迎

• Experience leading system-architecture design and trade-off analysis for the entire payload (for senior / architect-oriented candidates)
• Experience understanding multiple payload subsystems (timekeeping, receiver, signal, orbit/time determination, etc.) across domains and integrating and aligning them
• Systems engineering practice such as requirements definition, specification development, and interface design
• Experience designing or developing space equipment or high-reliability systems (aerospace, defense, precision instruments)
• Experience designing or verifying onboard processing systems such as FPGA or embedded microcontrollers
• Experience with testing and verification using GNSS simulators
• Practical experience with development processes compliant with space/aviation standards, such as requirements management and FMEA
• Experience in technical negotiation and specification coordination with external vendors and partners
• Technical documentation (Japanese and English) and handling international conferences in English
• Willingness to work in a Japanese-language environment for technical documentation and communication

求める人物像

• Someone who can render the entire payload as a single, coherent design: holding a system-level design philosophy rather than optimizing subsystems in isolation, and able to logically evaluate trade-offs even outside their own area
• Someone who can keep facing problems with no established answer, forming hypotheses, verifying them, and translating them into design
• Someone who can propagate technical decisions across the team (Pay it Forward), sharing "why this specification" while collaborating
• Someone who can commit to the mission with a mid-to-long-term perspective (Mission Commitment)

応募について

• We welcome candidates from outside the space industry, including those who have worked deeply in related technical areas such as aerospace, defense, communications, precision instruments, and automotive.

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Job Overview

• As the architect of the navigation payload, you will establish the overall design philosophy of the payload for LEO-PNT (Low Earth Orbit Positioning, Navigation, and Timing) and LNSS (Lunar Navigation Satellite System). How to combine the subsystems, in what signal format, and to what level of performance: you will define "how this payload is built" itself, and this position also covers the systems engineering required to realize that design as actual hardware.
• The following is the scope of this position. You will not be responsible for all of it on your own; the areas you mainly cover are set according to your experience, expertise, and grade (junior to architect).

Specific Responsibilities

• Establish the overall architecture and design philosophy of the navigation payload (determine subsystem configurations and signal formats)
• System-level trade-off analysis (design decisions across performance, cost, and schedule)
• Establish system requirements and the error budget (performance requirements, error-budget allocation, interface definition) and ensure consistency with the overall satellite system
• Develop specifications for, and ensure consistency across, each subsystem (time keeping system, GNSS receiver, onboard ephemeris generation, navigation signal transmission)
• Study and design the on-orbit operations sequence of the navigation payload
• Systems engineering to realize the design as hardware (specification development, interface design, documentation: system design documents, interface specifications, test plans, etc.)
• Define the system-level verification strategy, and plan and conduct tests
• Bridge the high-level design philosophy and quantitative performance requirements to each development team; conduct technical negotiation, specification coordination, and reviews with external contractors and partners
• Project progress management, and system-level risk analysis and quality control

Role Opportunities

• Bring together specialized areas such as time keeping, GNSS receivers, and signal design; rather than staying within a single component's specialty, you design and lead the entire navigation payload as a system, owning the full picture of what it achieves and to what accuracy
• Engage in the design of a positioning system (LEO-PNT / LNSS) that is among the first of its kind even in the private sector worldwide
• In an environment where everything from the payload to the satellite that carries it is designed and manufactured in-house, get involved in "how it is built," from design philosophy to signal format
• Opportunities to collaborate with government and international partners including JAXA, NASA, and ESA (such as participation in the LunaNet standardization discussions)
• Opportunities to participate in and present at international conferences and to publish research
• The design philosophy you shape is carried through demonstration satellites into future social infrastructure, letting you experience your design working in space over the mid-to-long term

Tools Used

• OS: Windows, Linux
• Code management: GitHub
• Task management: GitHub Projects V2 / GitHub Issues
• Version control: Git
• Languages: C, C++, Python, MATLAB/Simulink, etc.
• Simulation: Various GNSS simulation tools
• AI: ChatGPT Business/Codex, Gemini, NotebookLM Plus, Claude Code, GitHub Copilot, Cognition Devin
• PC: Provided based on personal preference
• Communication: Slack, Zoom
• Groupware: Google Workspace