px4-log-analysis

Profile GPS signal quality from a PX4 ULog — satellites, fix type, receiver accuracy, EKF innovations, stationary drift, and raw-position jitter. Supports a two-log compare mode for before/after flights (e.g. driver A/B, firmware bisects, receiver swaps). Use when the user wants to validate GPS behavior across a change.

Analyze accelerometer vibration from a PX4 ULog, compute PSDs, spectrograms, identify notch filter targets, and compare Z velocity estimation. Use when the user wants to evaluate accel vibration or tune notch filter parameters.

Analyze barometric pressure bias from a PX4 ULog — thrust pressurization, ground effect, thermal drift, and EKF impact. Use when the user wants to investigate baro-related altitude errors, Z velocity drift, or ground effect issues.

Analyze PX4 ULog file size by topic breakdown. Use when the user wants to understand what's taking up space in a .ulg log file.