FIGURE 6.1 Example pattern of satellite ground tracks for the Geosat altimeter (see Douglas and Cheney, 1990, and Vol. 95, Nos. C3 and C10 of J.Geophys. Res.) with a 17-day exact repeat orbit configuration. Upper panel shows the ground tracks traced out during days 1 to 3 (solid lines), days 4 to 6 (dashed lines), and days 7 to 9 (dotted lines) of each 17-day repeat cycle. Note the eastward shift of a coarse-resolution ground track pattern at 3-day intervals. Lower panel shows the complete grid of ground tracks sampled during each 17-day cycle. SOURCE: Courtesy of Dudley Chelton, Oregon State University.