Is anyone using the EMANE jammer 
(https://github.com/adjacentlink/emane-jammer-simple) with directional antennas 
in a simulation?  I've got a simple simulation using directional antennas and 
freespace propagation where 2 nodes are given a single GPS event, then don't 
move, just point at each other:

1 ---- 2

They come up fine, traffic passes and nothing really happens.  I've tried to 
add a jammer at a different lat/long/alt with corresponding antenna steering 
events to get the azimuth / elevation pointed towards node 2 (using the 
formulas here:  
https://github.com/adjacentlink/emane/wiki/Computing-Antenna-Gain):

1 ---- 2
     /
J-

Although the jammer is configured to use the same transmitting frequency at the 
same power as node 1, I see no effects on node 2 in terms of traffic loss.  The 
only way I can get an effect is to move the Jammer to the exact lat/long/alt as 
node 1 and use the same antenna steering az/el as node 1.  Of course, this is 
less than ideal if I want to add mobility to the scenario - the Jammer will 
have to track node 1.

What am I doing wrong?  Has anyone else had success with jamming directional 
antennas in freespace propagation?

Cheers,

Michael J. Vincent
Lead Network Systems Engineer | The MITRE Corporation | Network Technology & 
Security (T864) | +1 (781) 271-8381

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