Of course it is in the public domain.....the unclassified bits that have been gleaned by various sources over the years.
It is no secret this kind of operation exists.
But as in every sensitive intelligence gathering operation....there is much that is not in the public domain.
You of course must be assuming the media knows all re this type of operation.....which just is not accurate.
The capability of the detection equipment is a very closely held body of data as is the successes or failures of that equipment over the years.
Do you think the media has a correct inventory on the aircraft being used....and from where they operate and who all is engaged in this work?