Publishing GPS data using ardrone_autonomy in ros Kinetic

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I am using ROS Kinetic on Ubuntu 16.04 LTS. I installed the ardrone_autonomy package by running

sudo apt-get install ros-kinetic-ardrone-autonomy

Then I sourced the bash file:

source /opt/ros/kinetic/setup.bash

When running the ardrone_autonomy, I dont see the topic

ardrone/navdata_gps

in rostopic list.

I also tried setting enable_navdata_gps:=True but still nothing changed.

Is there something I am missing here ?