Table 3 Description of key-value sets of json objects in position files.

From: RoboMNIST: A Multimodal Dataset for Multi-Robot Activity Recognition Using WiFi Sensing, Video, and Audio

Key

Type

Value

robot_number

Integer, either 1 or 2

The robot number based on Fig. 1

time_stamp_ns

Array of integer numbers

The timestamps of robot positions in nanoseconds (synchronized with CSI timestamps)

joint_positions

Matrix of floating point numbers

The joint positions of the robot in radian, where each row corresponds to a timestamp

EE_positions

Matrix of floating point numbers

The Cartesian positions of the robot’s end effector in meter, where each row corresponds to a timestamp