nh_private.param("output_frame", output_frame_, std::string("odom_combined"));
nh_private.param("sensor_timeout", timeout_, 1.0);
nh_private.param("odom_used", odom_used_, true);
nh_private.param("imu_used", imu_used_, true);
nh_private.param("vo_used", vo_used_, true);
nh_private.param("debug", debug_, false);
nh_private.param("self_diagnose", self_diagnose_, false);
double freq;
nh_private.param("freq", freq, 30.0);
These are the parameters that you can change ( code is from odom_estimation_node.cpp
in the source directory of robot_pose_ekf )
Seems like you can not change base frame id as a parameter. You can change it manually and recompile the source. I am not very sure if you can remap tf frames but I checked here, it is not possible right now i guess