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The paper is a sequel to our previous work (Zhang et al. Phys. Rev. D 103,062001 (2021)). For proposed geocentric space-based gravitational wavedetectors such as TianQin, gLISA, and GADFLI, the gravity-field disturbances,i.e., the so called ``orbital noise'', from the Earth-Moon system on thesensitive intersatellite laser interferometric measurements should be carefullyevaluated and taken into account in the concept studies. Based on TianQin, weinvestigate how the effect, in terms of frequency spectra, varies withdifferent choices of orbital orientations and radii through single-variablestudies, and present the corresponding roll-off frequencies that may set thelower bounds of the targeted detection bands. The results, including thespecial cases of geostationary orbits (gLISA/GADFLI) and repeat orbits, canprovide a useful input to orbit and constellation design for future geocentricmissions.

Effect of Earth-Moon's gravity on TianQin's range acceleration noise. II. Impact of orbit selection