A sample profile measured on day 97 of the year 1969, at 17:03 UT around equator (lat = 12° S, long = 12.5° E). The ion density profiles in logarithmic scale obtained without optimization (denoted as “old”) and those with optimization (denoted by “new”) are color coded, along with the measured Ne profile presented with the black line. The “old” profiles are presented by dashed lines, while the “new” profiles are given by solid lines. The total ion density presented the sum of the “new” profiles is given by the orange line.