# Synthesized sample of `ros2 topic echo --csv --once /imu` for a
# `sensor_msgs/msg/Imu` message. The first two columns are
# `header.stamp.sec` and `header.stamp.nanosec` — ros2cli's `message_to_csv`
# walks the message in declaration order and emits each scalar field as a
# CSV column. Imu starts with `Header header` whose first two fields are
# the timestamp, so the leading two columns are reliably the publish-time
# timestamp for any Header-stamped message.
#
# Captured against ROS2 Jazzy by analogy; no live capture was possible on
# the workstation this fixture was authored on (no ROS2 install). The
# shape matches `ros2cli`'s `message_to_csv` flattening rules.
1715600000,123456789,base_link,0.0,0.0,0.0,1.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0
