Abstract: Since 2013,with the popularity of a taxi software,app-based ride-hailing continuously come into our vision and become active in major cities throughout the country.Subsequently, the customer complaints that positioning are not precise and the calculating mileage is not right. To solve these problems,this paper puts forward a test method of billing for app-based ride-hailing,using multi-mode, multi-frequency RTK GPS carrier phase differential technique and inertial navigation technique,using RTK differential GNSS receiver of base station and flow station,inertial navigation module,high precision of conjugate ring navigation antenna and playback apparatus to record the information such as latitude and longitude,journey time,speed and so on when the car in the process,then it calculates the mileage of the car.By comparing with the results of driver's mobile phone,the results show that using carrier phase differential technique and inertial navigation technique can effectively solve the problem of positioning loss of lock,discontinuous of trajectory and so on.

Key words: app-based ride-hailing, RTK, carrier phase differential, inertial navigation