Abstract: A Code-minus-phase Combination (CC) and Multipath (MP) GPS and BeiDou (BD) measurements analysis approach is demonstrated, and the qualitative results of single frequency GPS and BD measurement signals are presented; the performances of CC ambiguity resolution with single frequency data is discussed lastly. The results show that: measurement signals of Geostationary Earth Orbit (GEO) satellite show a higher precision than Inclined Geosynchronous Satellite Orbit (IGSO) satellite; the multipath effects of two kinds of measurement signals behave in long-term and short-term trend. When a long period is utilized, such as 600s, the success rate of CC ambiguity resolution can reach over 90% in GPS L1/L2 and BD B1/B2 frequency, however, when short period is utilized, such as 120s, owing to the stronger multipath effects, the success rate of BD IGSO satellite is the lowest, no more than 50%.