Over thirteen months, contributed to the Space-and-Satellite-Systems-UC-Davis/ADCS-Software repository by designing and refining embedded software for satellite attitude determination and control. Developed features such as sensor data calibration, real-time TLE-based orbit tracking, and robust control loop management, emphasizing reliability and maintainability. Applied C and Shell scripting to implement modular sensor integration, data logging, and build automation, while leveraging algorithm optimization and code refactoring to improve performance and clarity. Addressed system robustness through error handling, persistent state management, and CI/CD enhancements. The work established a foundation for autonomous, real-time satellite operations with clear code organization and traceable engineering practices.
May 2026 (Space-and-Satellite-Systems-UC-Davis/ADCS-Software) focused on foundational improvements to observability, reliability, and modularity of the ADCS stack. Key initiatives include standardizing logging data formats across logged, uplinked, and downlinked data via a new logging_records.h, enabling consistent data capture and easier diagnostics. Implemented persistence for the experiment generation counter using non-volatile memory, replacing a reset-prone static variable with vi_get_experiment_generation() and vi_increment_experiment_generation(), ensuring continuity across board restarts. Refactored attitude retrieval and eclipse status checks into the ADCS module to improve code organization and maintainability. Cleaned up the codebase by removing legacy logging_records comments to reduce noise while preserving functionality. These changes enhance data integrity, system reliability, and maintainability, delivering clearer observability and safer operational indicators for the platform.
May 2026 (Space-and-Satellite-Systems-UC-Davis/ADCS-Software) focused on foundational improvements to observability, reliability, and modularity of the ADCS stack. Key initiatives include standardizing logging data formats across logged, uplinked, and downlinked data via a new logging_records.h, enabling consistent data capture and easier diagnostics. Implemented persistence for the experiment generation counter using non-volatile memory, replacing a reset-prone static variable with vi_get_experiment_generation() and vi_increment_experiment_generation(), ensuring continuity across board restarts. Refactored attitude retrieval and eclipse status checks into the ADCS module to improve code organization and maintainability. Cleaned up the codebase by removing legacy logging_records comments to reduce noise while preserving functionality. These changes enhance data integrity, system reliability, and maintainability, delivering clearer observability and safer operational indicators for the platform.
February 2026 focused on enhancing sensor data reliability for attitude estimation in the ADCS software. Delivered a body-frame alignment feature by introducing and applying transformation matrices to magnetometer (mag) and IMU readings, enabling downstream navigation and attitude estimation to operate on body-frame data. Key highlights include groundwork for frame alignment: mag_to_body_transform and imu_to_body_transform are defined and utilized within getMag and getImu, with calibration performed in the body frame. This reduces frame-mismatch risks and improves data quality for fusion algorithms. The implementation is currently using identity transforms as a safe placeholder until hardware axis tests validate the correct alignment. Commit reference: 032f55cb4a31f50cbb3e1e42477d0642fd8d25de – "sensors: Apply arbitrary transforms to mag and imu"; description indicates the intent to convert sensor values into the body frame and ensure consistent body-frame data across computations.
February 2026 focused on enhancing sensor data reliability for attitude estimation in the ADCS software. Delivered a body-frame alignment feature by introducing and applying transformation matrices to magnetometer (mag) and IMU readings, enabling downstream navigation and attitude estimation to operate on body-frame data. Key highlights include groundwork for frame alignment: mag_to_body_transform and imu_to_body_transform are defined and utilized within getMag and getImu, with calibration performed in the body frame. This reduces frame-mismatch risks and improves data quality for fusion algorithms. The implementation is currently using identity transforms as a safe placeholder until hardware axis tests validate the correct alignment. Commit reference: 032f55cb4a31f50cbb3e1e42477d0642fd8d25de – "sensors: Apply arbitrary transforms to mag and imu"; description indicates the intent to convert sensor values into the body frame and ensure consistent body-frame data across computations.
Month: 2025-11 – Focused on robustness and correctness in Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Delivered FreeRTOS Control Loop Transaction Management to protect control loop iterations from scheduler interruptions, reducing race-condition risk during sensor data processing. Implemented lifecycle-managed transactions with mode-restart awareness to reset the loop when necessary, improving system reliability. Major commit: 7052d50e99aa22364d53bf28ff3bb4821001aaf9 (Add scheduling VI functions) detailing wrapping iterations in transactions and mode restart checks. Impact: improved robustness of attitude control loops, higher determinism, and safer mode transitions.
Month: 2025-11 – Focused on robustness and correctness in Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Delivered FreeRTOS Control Loop Transaction Management to protect control loop iterations from scheduler interruptions, reducing race-condition risk during sensor data processing. Implemented lifecycle-managed transactions with mode-restart awareness to reset the loop when necessary, improving system reliability. Major commit: 7052d50e99aa22364d53bf28ff3bb4821001aaf9 (Add scheduling VI functions) detailing wrapping iterations in transactions and mode restart checks. Impact: improved robustness of attitude control loops, higher determinism, and safer mode transitions.
October 2025 monthly summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software: Focused on hardening the detumbling and BDOT attitude-control loops to improve timing accuracy, robustness, and autonomy. Key work includes refactoring detumble to compute timeouts with get_delta_t and introducing magnetometer-based angular velocity estimation. BDOT control was hardened to handle undefined magnetic vectors and delta-time safety to prevent division-by-zero. These changes reduce mission risk during detumble, improve control stability under sensor anomalies, and deliver more reliable autonomous attitude management. Commits: bdcd9596ad310157a79d8865fe55b3db35b33472; 05b76fec1012eecbc20bef1d0dde825e10206d1c.
October 2025 monthly summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software: Focused on hardening the detumbling and BDOT attitude-control loops to improve timing accuracy, robustness, and autonomy. Key work includes refactoring detumble to compute timeouts with get_delta_t and introducing magnetometer-based angular velocity estimation. BDOT control was hardened to handle undefined magnetic vectors and delta-time safety to prevent division-by-zero. These changes reduce mission risk during detumble, improve control stability under sensor anomalies, and deliver more reliable autonomous attitude management. Commits: bdcd9596ad310157a79d8865fe55b3db35b33472; 05b76fec1012eecbc20bef1d0dde825e10206d1c.
Monthly summary for 2025-09 focused on reliability of sensor data initialization and clear separation of concerns between sensors and calibration. Implemented a key bug fix in the low-pass filter to support seamless first-time readings and performed a module-level refactor to improve initialization flows and maintainability. This work establishes a robust foundation for ongoing sensor calibration and data quality in the ADCS software.
Monthly summary for 2025-09 focused on reliability of sensor data initialization and clear separation of concerns between sensors and calibration. Implemented a key bug fix in the low-pass filter to support seamless first-time readings and performed a module-level refactor to improve initialization flows and maintainability. This work establishes a robust foundation for ongoing sensor calibration and data quality in the ADCS software.
2025-08 Monthly Summary — Space-and-Satellite-Systems-UC-Davis/ADCS-Software
2025-08 Monthly Summary — Space-and-Satellite-Systems-UC-Davis/ADCS-Software
June 2025: Delivered core system enhancements for Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Key features delivered include (1) vi_sensor data structure overhaul from enum to struct to improve data encapsulation and support for diverse sensors, and (2) a new inrange satellite visibility tool for ground-station calculations using TLE data, with a Makefile for reliable builds. No major bugs fixed this month. Overall, these changes improve maintainability, extend sensor integration capabilities, and provide ready-to-use visibility calculations for mission planning. Demonstrated technologies: C programming, data-structure redesign, build automation (Makefile), and orbital mechanics concepts.
June 2025: Delivered core system enhancements for Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Key features delivered include (1) vi_sensor data structure overhaul from enum to struct to improve data encapsulation and support for diverse sensors, and (2) a new inrange satellite visibility tool for ground-station calculations using TLE data, with a Makefile for reliable builds. No major bugs fixed this month. Overall, these changes improve maintainability, extend sensor integration capabilities, and provide ready-to-use visibility calculations for mission planning. Demonstrated technologies: C programming, data-structure redesign, build automation (Makefile), and orbital mechanics concepts.
May 2025 performance summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software: Delivered core feature work across sensor selection, detumbling generation management, and magnetic field lookup, alongside code quality and maintainability improvements. No major bug fixes were completed this month; instead, a deliberate defect was introduced in ADCS.c to validate debugging workflows and will be corrected in the next sprint. The work improves attitude control reliability, modularity, and maintainability, enabling faster iteration and safer operation in space environments. Technologies demonstrated include C, bitwise operations, lookup designs, API design for generation management, and code quality practices (clang-format, modular refactoring).
May 2025 performance summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software: Delivered core feature work across sensor selection, detumbling generation management, and magnetic field lookup, alongside code quality and maintainability improvements. No major bug fixes were completed this month; instead, a deliberate defect was introduced in ADCS.c to validate debugging workflows and will be corrected in the next sprint. The work improves attitude control reliability, modularity, and maintainability, enabling faster iteration and safer operation in space environments. Technologies demonstrated include C, bitwise operations, lookup designs, API design for generation management, and code quality practices (clang-format, modular refactoring).
Monthly work summary for 2025-04 focusing on Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Highlights include robustness improvements in detumbling with cross-language compatibility, targeted sensor/actuator control enhancements in virtual Intellisat, sensor integration for attitude control (CSS) with maneuver controls, and build-time optimizations. Timekeeping and utilities were modernized, and ADCS status reporting was clarified. Build hygiene improvements and header cleanups reduced dependencies and potential issues, contributing to faster iterations and clearer code ownership.
Monthly work summary for 2025-04 focusing on Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Highlights include robustness improvements in detumbling with cross-language compatibility, targeted sensor/actuator control enhancements in virtual Intellisat, sensor integration for attitude control (CSS) with maneuver controls, and build-time optimizations. Timekeeping and utilities were modernized, and ADCS status reporting was clarified. Build hygiene improvements and header cleanups reduced dependencies and potential issues, contributing to faster iterations and clearer code ownership.
Concise monthly summary for February 2025 for Space-and-Satellite-Systems-UC-Davis/ADCS-Software. This month focused on improving debugging capability, stabilizing the ADCS software, and strengthening the CI pipeline for ARM-based builds. Delivered features and improvements enable faster issue diagnosis, more reliable attitude control experiments, and smoother release readiness.
Concise monthly summary for February 2025 for Space-and-Satellite-Systems-UC-Davis/ADCS-Software. This month focused on improving debugging capability, stabilizing the ADCS software, and strengthening the CI pipeline for ARM-based builds. Delivered features and improvements enable faster issue diagnosis, more reliable attitude control experiments, and smoother release readiness.
January 2025 performance summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Focused on maintainability, simulation capabilities, and controlled experiment workflows. Delivered three targeted features with corresponding build and documentation improvements, leading to a cleaner codebase, more reliable simulations, and faster onboarding for new contributors.
January 2025 performance summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Focused on maintainability, simulation capabilities, and controlled experiment workflows. Delivered three targeted features with corresponding build and documentation improvements, leading to a cleaner codebase, more reliable simulations, and faster onboarding for new contributors.
2024-11 monthly summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software focused on robustness, performance, and maintainability. Delivered targeted ADCS and magnetic field modeling improvements, tied to evolving orbital data (TLEs), with substantial code hygiene upgrades. The work enhances reliability of attitude determination, reduces unnecessary recomputations, and simplifies future integration efforts across the repository.
2024-11 monthly summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software focused on robustness, performance, and maintainability. Delivered targeted ADCS and magnetic field modeling improvements, tied to evolving orbital data (TLEs), with substantial code hygiene upgrades. The work enhances reliability of attitude determination, reduces unnecessary recomputations, and simplifies future integration efforts across the repository.
October 2024 monthly summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Delivered a linear ramp controller to generate actuator commands based on time and ramp parameters, enabling smoother actuator transitions and improved control stability. This enhancement strengthens spacecraft attitude control capabilities and supports safe ramping behavior in actuator sequences. Commit reference: 342bb06c5655e9bc73864245f9922443b454ac58.
October 2024 monthly summary for Space-and-Satellite-Systems-UC-Davis/ADCS-Software. Delivered a linear ramp controller to generate actuator commands based on time and ramp parameters, enabling smoother actuator transitions and improved control stability. This enhancement strengthens spacecraft attitude control capabilities and supports safe ramping behavior in actuator sequences. Commit reference: 342bb06c5655e9bc73864245f9922443b454ac58.
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