Interconnecting device of wireless- transmitting data by using Code Division Multiple Access circuit mode for land surveying using Real Time Kinematic Global Positioning System

摘要

PURPOSE: A data transmission interworking apparatus for an RTK(Real Time Kinematic) GPS(Global Positioning System) lateral position using a circuit type radio data communication of a CDMA method is provided to detect a location of a rover station without a limitation to a distance and solve a propagation disturbance problem due to installation of frequent virtual reference points, frequency repetition and a congested area by transmitting and receiving a signal between a reference station and rover station. CONSTITUTION: A GPS receiver(100) of a reference station(107) records a carrier phase and a pseudo range measurement value from a GPS satellite signal received by a predetermined location and outputs a corresponding data in a CMR2 format. When an RTK module unit(103) receives a data transmission request from a terminal(105), it packetizes a bit stream in the CMR2 format outputted from the GPS receiver(100) after an authentication procedure into a TCP/IP format and transmits it to the radio communication terminal(105). The radio communication terminal(105) receives the packetized data and transmits it to a rover station(307) through a base station(200). The radio communication terminal(305) of the rover station(307) receives the TCP/IP data from the reference station(107) and transmits it to an RTK module unit(303). The RTK module unit(303) converts the bit stream in TCP/IP format received from the radio communication terminal(305) into a CMR2 format and transmits it to the GPS receiver(300). When more than four satellites are picked up, the GPS receiver(300) performs a measurement by using the CRM2 data stream(a carrier phase and a pseudo distance) inputted through the RTK module unit(303) and the GPS satellite signals.