title: Science scope.
abstract: In figure 1 (p. 1509) of the Research Article "Radar images of Mars" by D. O. Muhleman et al. (27 Sept., p. 1508), the Mars longitude of the sub-Earth point was mislabeled in each of the six snapshot radar images of Mars. None of the labels should have contained a decimal point. The values of lambda in the labels should have been 78, 92, 104, 120, 133, and 147, respectively.