Compass introduces ground-based augmentation system price: Beidou satellite navigation system (COM PASS) is China's own construction, independent operation and is compatible with other satellite navigation systems in the world global satellite navigation system, the current system has achieved coverage of the Asia-Pacific region, the Asia-Pacific region offers Navigation and communication services, and ultimately the formation of global coverage by 2020. Beidou system is the embodiment of our country's great power status and an important indicator of overall national strength is a major national space and information technology infrastructure our country, is a major technical support systems and strategic deterrence basic resources for national security of our country. Compass specific target countries for the construction of ground-based augmentation system in the construction of 150 nationwide uniform framework network reference stations, while establishing 150 demonstration encrypted network reference stations in Hubei, Hunan and Guangdong; the completion of an integrated data processing center and a backup data processing centers, three regional data processing center construction; complete transportation, surveying and mapping industry, geographical conditions and the general public to monitor application service demonstration subsystem construction, wide, regional, integrated auxiliary enhanced integration services; and demonstration network encryption through the frame reference Construction of the station, in order to achieve real-time centimeter-level positioning service system to provide a unified nationwide construction site selection, unified planning and construction, and acceptance criteria. A project target reference station subsystem and uninterrupted data transmission system control centers. Streaming data system control center, data processing, data warehousing. Data and other related information services provided to users through the Internet, to achieve precise positioning function afterwards. In GSM, GPRS, CDMA and other data communication services the way real-time location information, real-time positioning. Second, the location of system engineering content reference station, observation room and observation pier infrastructure; create a system management center and corresponding Intranet network (internal LAN); the establishment of a data transmission system reference stations and management centers; precise construction of multiple interfaces Differential broadcasts the system information and the general navigation differential information; user's hardware and software systems. Complete centimeter, decimeter level positioning and navigation service three meters, the system has the function of Tianchen Beidou CORS system functions currently lies in two aspects: the first is through dial-up server to provide real-time wireless data communications to users precise positioning service; the second is to provide accurate data post-processing services to customers via the Internet. In the effective coverage area of ??the positioning signals using a GNSS survey receiver can be controlled point measurement city levels (not fully shaded area), centimeter accuracy; in the effective coverage area of ??the positioning signals to provide real-time measurements GNSS to meet the non-shaded area of ??engineering surveying, map surveying, precision timing requirements for other items; the system real-time broadcast RTK information, users can use GSM, GPRS, CDMA in any means of real-time access difference data, while the system supports RTCA , CMR, RTCM2.x, RTCM V3.0, RTD and other data formats, and also supports all major brands of international GNSS / GNSS receiver to work within the network; The system uses the Internet or other means can be realized after the precise positioning data service, Data format support RINEX2.0 and RINEX2.1; reference station network software, server software and client center software are all-Chinese interface, including mapping, stakeout and future navigation software system, provides users with a good use interface; The system offers good security, with a complete billing and user management capabilities. Fourth, the site for the system, the following guidelines when the site first, secondly to ensure that the distance between the site do not exceed 60 km, and the chosen reference station can completely cover the entire area and the surrounding areas, not the entire region blind. Observing the environment is easy to produce a multi-path effects from the feature (such as tall buildings, trees, water, beach and easy water zone, etc.) at a distance not less than 200m; there should be 10 degrees above the horizon elevation angle of the satellite-sight conditions; Away Electromagnetic interference areas (such as microwave stations, radio transmitters, power lines across the zone, etc.) is not less than 200M; avoid areas prone to vibration. b geological environment reference stations should be established on a stable block, to avoid geological structure unstable areas (such as fault, and so prone to landslides and subsidence local deformation region) and subject to flooding or groundwater level changes in the larger region; c Easy access to maintain conditions for public or private communications network; a stable, safe and reliable power supply; transport, to facilitate personnel exchanges and transport vehicles; facilitate long-term preservation. d reconnaissance implement steps according to the technical design, validation of geotechnical, soil type and the load-bearing capacity, as required in the field selected point positioning; field mapping point of the record, five, submit the results of their administrative divisions and natural geography, seismic and geological profiles, remember far point of the site;; transportation, communications, material, water and electricity, law and order situation; point of the distance the panorama analysis of field test data and results; other data collection. Sixth, the hardware: 1, M100C monitoring receivers 1 2, Double Star dual CORS antenna (BDS + GPS) 1 个 3, GNSS antenna cable a predetermined length according to the site and 4, a seven-core data line 5, Power adapter (or the power supply, power cord) 1 set of 6, CDC Beidou ground-based augmentation system software CD 1 Options: 1, a 2 lightning arrester 1 3, UPS power supply 1 set of 4, the central server (ordinary computers) Taiwan 5, a serial server (multiple base stations need this device, a single base station required) 6, serial line 1 (multi-cell need this device, a single base station required) 7, a cabinet according to the Global Positioning System Continuously Operating Reference building needs station network construction specifications and Party, this system includes structure, site selection, infrastructure, equipment configuration, data communications networks, data centers continuously operating reference station network composition, data processing, data management, products and services. 1, operation of the system maintenance costs? People salary costs? Maintenance fee? Communication costs? Engineering and maintenance costs? Administrative Expenses? Service fee? Commercial services revenue Tianchen Beidou satellite navigation technology (Tianjin) Co., Ltd., the Beidou ground-based augmentation system price