2-D greyscale probe images for selected probe mounts on the two WP-3D aircraft. a) Vertical arm cloud probe, inboard mount, NOAA-42. b) Horizontal arm precipitation probe, outboard mount, NOAA-42. 2DG-P length scale is 9.6 mm. c) Vertical arm precipitation probe, inboard mount, NOAA-43. d) Vertical arm cloud probe, outboard mount, NOAA-43. e) Horizontal arm cloud probe, inboard mount, NOAA-43. 2DG-C length scale is 1.96 mm.