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James J. Condon coauthored Essential Radio Astronomy by James J. Condon and Scott M. Ransom with Scott M. Ransom. The text develops the connection between physical radiation mechanisms and the measurements made by radio telescopes.

Its treatment of free-free emission connects the electron temperature, emission measure and optical depth to the observed radio signal. This is useful because an astronomical radio image records radiation after both its production and its passage through intervening material; interpreting brightness requires both parts of that model.^[ref]

Scott M. Ransom works in radio astronomy and explains its measurement physics with James J. Condon in their textbook Essential Radio Astronomy by James J. Condon and Scott M. Ransom. Their treatment connects received radio waves to measurable antenna signals and the physical properties of astronomical sources.

For example, the radiometer analysis relates measurement uncertainty to receiver noise, observing bandwidth and integration time. Increasing either the independent frequency range or observing duration improves sensitivity through statistical averaging. This supplies the physical reasoning needed to design observations, rather than treating telescope sensitivity as a single unexplained specification.^[ref]