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There are tens of millions of compact binary systems in the Milky Way, calledgalactic binaries (GBs), most of which are unresolved, and the Gravitationalwaves (GWs) emitted overlap to form foreground confusion. By simulating suchforeground confusion, we have studied how LISA, Taiji and TianQin, includingtheir alternative orbital configurations, subtract resolvable GBs when theycombine as some networks. The results of our research indicate that the orderof detected number for a single detector from high to low is: Taiji-m, Taiji-p(c), LISA, TianQin I, TianQin II. For detector combinations on the network, theforeground confusion is effectively reduced as the number of detectors grows,and the optimal combinations with different numbers are: Taiji-m, LISA+Taiji-m,LISA+Taiji-m+TianQin I, and LISA+Taiji-m+TianQin I+II. The sensitivity curve isoptimized as the number of detectors increases, which renders it possible todetect other gravitational wave sources more precisely and decrease theresolvable GBs parameter uncertainty. Based on this, we discuss the parameteruncertainty of resolvable GBs detected by the combinations above and find thatGW detection can promote electromagnetic (EM) detection. On the contrary, wediscovered that by utilizing EM detection, determining the inclination anglecan reduce the uncertainty of GW strain amplitude by $\sim$93%, and determiningthe sky position can reduce the uncertainty of the phase by $\sim$30%, furtherstrengthening the connection between GW detection and EM detection, andcontributing to the research of Multi-messenger astronomy.

physical review. d/physical review. d.

Subtraction of the confusion foreground and parameter uncertainty of  resolvable galactic binaries on the networks of space-based  gravitational-wave detectors