Definitions
There is 1 meaning of the phrase
Passive Source.
Passive Source - as a noun
An informant who is not assigned to obtain specific intelligence but who routinely passes on whatever information he or she has
Example Sentences
"Seismic signals recorded by underground seismometers are passive sources of information for studying the Earth's interior."
"Researchers use passive source imaging to identify potential locations of geothermal reservoirs."
"By analyzing passive sources of radiation, astronomers can study distant galaxies."
"Detecting gravitational waves from merging black holes is an example of a passive source observation."
"Seafloor hydrothermal systems are often explored using passive source electromagnetic sensors."
