Impact analysis of position datum distribution on GPS network optimization design

The text briefly introduces GPS control network data manage and the categories and indicators of GPS control network optimization design at first,then the impact on positioning precision caused by selection method of distribution of position datum is studied through experimental and theoretical analysis,taking specific caculation of CORS as example,appropriate conclusions are obtained: IGS position datum stations around the unknown points and uniformly distributed should be chosen,stations located in low-latitude regions should be chosen.