Figure (A) presents the estimates of absolute roundoff error for 𝜁, as a function of 𝑘 9CD , for case study a, considering ℎ $ and 𝐾 evaluated at 𝑇 1 = 597.2 K. The results are presented according to the methods described in Section 6.5.1: A (markers), and B (solid and dashed lines for random and non-random roundoff errors, respectively). Using method B, the roundoff error was estimated by comparing the SAS at each 𝑘 9CD considered (10 ? to 10 s ) with the exact solution at 𝑘 9CD = 1.