Simulated ngVLA images computed from the disk simulations illustrated in Fig. 1. Each map corresponds to a single particle size: 6.4 mm (λ = 3.7 mm) and 2.0 cm (λ = 1.0 cm), in top and bottom rows, respectively. The images in the left panels were obtained after tapering the interferometric visibilities with a 0.1 arcsec beam; the images in the right panels fully exploit the maximum angular resolution expected for the ngVLA at these wavelengths (see text).