Table 6
Test result of Sun Ephemeris Generation by Chebyshev interpolation

Interpolation order Interpolation interval (days) Maximum distance error (km) Mean distance error (km) Standard deviation (km) Data budget (byte/day) Requirements satisfaction
4 8 178.88 40.65 40.67 390 yes
16 2,462.02 612.83 597.09 195 yes
32 25,029.17 8,226.13 7,265.34 97.5 no

5 8 12.95 3.10 2.87 480 yes
16 267.41 79.80 65.44 240 yes
32 3,471.43 1,506.53 1,027.78 120 no

6 8 2.43 0.36 0.42 570 yes
16 88.03 15.68 17.11 285 yes
32 1,676.79 547.63 412.48 142.5 yes

7 8 0.37 0.05 0.06 660 yes
16 23.03 4.00 4.62 330 yes
32 612.10 188.20 162.04 165 yes

8 8 0.07 7.88E-3 0.01 750 yes
16 7.81 1.10 1.39 375 yes
32 298.24 80.53 69.93 187.5 yes