Remapping and ApproximateTimeSynchronization

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I've run into a seemingly simple issue that I cannot solve. I have a working model that takes sensor outpput and synchronizes messages using the python version of ApproximateTimeSynchronization. The issue likely is remapping related, but I cannot seem to produce output topics from the synchronization node to verify syncro topics. My launch file is:

launch>

        <node pkg="bag2orb" type="ned_rpy_imu.py" name="afl_tatbry_node"> 
        <remap from="tat_bry" to="tat_bry"/> 
        </node>


         <node pkg="bag2orb" type="afl_apprxtimesync_node.py" name="aflsync_node"> 
                <remap from="tat_bry" to="tatbryout"/>  
                <remap from="gps/filtered" to="gpsout"/>   
         </node>         

  </launch>

And a partial node map:

I've read the documentation on remapping and have been unsucessful remapping both topics to another relative topic. From the log files, the syncro seems to be working. What syntax am I missing for either ApprTimeSynchro or general remapping? My desire is to republish the synchronized topics under the remapped names.

Any insight would be greatly appreciated.

Thank you,

B2256