Utm->odom tf is not being published (robot_localization eloquent-devel)

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Hi everyone,

I'm using the robot_localization package for getting the position and velocity of my robot by using IMU and GPS. I am able to get the /odometery/filtered data.

However, Utm->odom frame is not being published even when broadcast_utm_transform: true.

Sensors used

1. IMU data of type sensor_msgs/Imu (IMU has a magnetometer from which it derives its yaw)
2. GPS data of type sensor_msgs/NavSatFix

Aim

To get a tf setup as shown below

utm->odom->base_link

Robot_localization setup

ekf_localization_node

• Inputs:
  • IMU
  • Transformed GPS data as an odometry message (navsat_transform_node output)
• Outputs
  • Odometry message

navsat_transform_node

• Inputs
  • IMU
  • Raw GPS (NavSatFix)
  • Odometry (output of ekf_localization_node)
• Outputs
  • Transformed GPS data as odometry message

The broadcast utm tranform is set to true: broadcast_utm_transform: true

Required Info:

• Operating System:
  • Ubuntu 18.04.4 LTS
• Installation type:
  • robot_localization installed from source
• Version or commit hash:
  • eloquent-devel

Steps to reproduce issue

After installing robot_localization from the source. Run the following in a terminal.

a. ros2 launch robot_localization ekf_map.launch.py &

with parameters as shown below

ekf_filter_node:
 ros__parameters:
    sensor_timeout: 0.1
    two_d_mode: true
    transform_time_offset: 0.0
    transform_timeout: 0.0
    publish_tf: true

    map_frame: map  
    odom_frame: odom  
    base_link_frame: base_link  
    world_frame: odom          

    odom0: odometry/gps
    odom0_config: [true,  true,  false,
                   false, false, false,
                   false, false, false,
                   false, false, true,
                   false, false, false]
    odom0_queue_size: 2
    odom0_nodelay: false
    odom0_differential: false
    odom0_relative: false
    odom0_pose_rejection_threshold: 5.0
    odom0_twist_rejection_threshold: 1.0


    imu0: example/imu
    imu0_config: [false, false, false,
                  true,  true,  true,
                  false, false, false,
                  true,  true,  true,
                  true,  true,  true]
    imu0_nodelay: false
    imu0_differential: false
    imu0_relative: true
    imu0_queue_size: 5
    imu0_remove_gravitational_acceleration: true

b. ros2 launch robot_localization navsat_transform.launch.py

with parameters as shown below:

navsat_transform_node:
 ros__parameters:
    frequency: 30.0
    delay: 3.0
    magnetic_declination_radians: 0.0
    yaw_offset: 0.0
    zero_altitude: false
    broadcast_utm_transform: true
    broadcast_utm_transform_as_parent_frame: true
    publish_filtered_gps: false
    use_odometry_yaw: false
    wait_for_datum: false

Expected behavior

To get a tf tree like

utm->odom->base_link

Actual behavior

odom->base_link

Please let me know if someone can help me figure this out. Thanks in advance.