Using the similarity recurrence method for path difference and formula of trigonometric function obtained by law of sine, the single station measuring equation of rendezvous angle between double stations can be derived which contains unknown radial distance of main station. The single station measuring formula based on rendezvous angle between double stations is obtained by utilizing the short ranging method based on phase difference measuring. Because it is only associated with the parameter measurement of main station, the secondary station as well as the space between two stations may be nominal in fact. The error analysis shows that better measurement accuracy can be gained because of the measuring formula of rendezvous angle is inversely proportional to radial distance.