WordNet
n. the detection and identification and evaluation and location of foreign electromagnetic radiations (other than radioactive)
Usage examples of "electronic reconnaissance".
White knew that ships, subs, aircraft, or even shore-based electronic surveillance systems could pick up electromagnetic emissions from long distances--passive electronic reconnaissance was one of White's most popular missions--so the Mistress's classified sections were shielded to foil eaves-droppers.
The Air Force will send electronic reconnaissance aircraft to try to pinpoint the locations and types of enemy antiaircraft that will try to shoot down the cruise missiles.
That would make the ROC invisible to every form of electronic reconnaissance, from normal light to electromagnetic.
They were all in battle-armor, though, a technical commando unit tasked with front-line electronic reconnaissance.