Assertion: telescope's observation | /r/AtLocation | early radio telescopes
Facets:
value: by tuning a receiver
type: MANNER
Source sentences:
text: In early radio telescopes, spectroscopic observations were made by tuning a receiver across a sufficiently large frequency range to cover the various frequencies of interest.
text: In early radio telescopes, spectroscopic observations were made by tuning a receiver across a sufficiently large frequency range to cover the various frequencies of interest.