GNSS Receiver Evaluation Development Engineer

必須

• Hands-on experience evaluating and verifying GNSS receivers (observable quality assessment, C/N0 analysis, multipath analysis, etc.)
• Technical understanding of GNSS signal processing (acquisition, tracking, pseudorange measurement, carrier phase measurement, positioning computation)
• Experience designing interfaces between electronic devices and conducting integration testing (communication protocols, timing design, etc.)

歓迎

• Experience implementing or evaluating high-accuracy positioning techniques (PPP, RTK, DGNSS, etc.)
• Knowledge of orbit and time determination algorithms (state estimation theory such as Kalman filters)
• Experience designing or developing time synchronization and timekeeping control applications using GNSS receivers
• Experience evaluating receivers using GNSS simulators
• Experience implementing receiver signal processing using software-defined radio (SDR) or FPGA
• Experience developing or evaluating space-borne equipment (space environment compatibility)
• 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

• Integrated technical understanding from GNSS receiver signal processing through to positioning computation, with the ability to translate evaluation insights into system improvements
• Ability to proactively drive technical coordination with external contractors and translate specifications into concrete deliverables
• Ability to independently identify technical issues between the receiver and the system, and resolve them in collaboration with relevant teams

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Job Overview

• Drawing on deep expertise in GNSS receiver signal processing and positioning computation, this position is responsible for the evaluation and verification of satellite-borne GNSS receivers. Beyond standalone receiver performance verification, the role places strong emphasis on integrated operation with the timekeeping control system and interface validation, ensuring that the payload system functions correctly as a whole. By leading the interface design and coordination between externally procured GNSS receivers and the system, you will contribute directly to satellite orbit and time determination — the core technology underpinning LEO-PNT (Low Earth Orbit Positioning, Navigation, and Timing) and LNSS (Lunar Navigation Satellite System). You will also take part in the in-house development of receivers for LEO-PNT and LNSS ground user terminals.

Specific Responsibilities

• Define technical requirements and develop specifications for satellite-borne GNSS receivers; communicate requirements to and coordinate technically with external contractors
• Evaluate receiver characteristics for multi-constellation and multi-frequency support (GPS, Galileo, QZSS, etc.)
• Assess quality of receiver observables (pseudorange, carrier phase, Doppler) and analyze error characteristics (C/N0, multipath, cycle slip, etc.)
• Design and conduct GNSS receiver performance evaluation and functional verification using GNSS simulators
• Design and define interfaces between GNSS receivers and the timekeeping control system; conduct integration testing
• Provide technical feedback to the orbit and time determination team based on receiver evaluation results
• In-house development of receivers for LEO-PNT and LNSS ground user terminals, including signal processing algorithm design and software-defined receiver implementation

Role Opportunities

• Play a key role at the intersection of GNSS receiver evaluation and system integration in LEO-PNT and LNSS — among the world's first in the private sector
• Career breadth beyond standalone receiver evaluation, with upstream involvement in interface design with timekeeping control systems and orbit/time determination
• The rare opportunity to develop ground user terminal receivers for LEO-PNT and LNSS in-house — an experience that exists almost nowhere else in the private sector worldwide
• Sharpen GNSS receiver expertise in the harsh space environment
• 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
• GNSS simulators
• RF measurement instruments including spectrum analyzers and signal generators
• Signal analysis and orbit computation using Python/MATLAB, etc.
• Code management: GitHub
• Task management: GitHub Projects V2 / GitHub Issues
• Version control: Git
• PC: Provided based on personal preference