Erratum.
In the report "Transcontinental baselines and the rotation of the earth measured by radio interferometry" by I. I. Shapiro et al. [186, 920 (1974)], the heading for columns 5 and 6 of Table 1 should read "Atomic time-universal time (A.1-UT.1)" and the second entry of column 1 should be followed by a double dagger (double dagger).