| GPS is developing in a very rapid way and now is | | | | features of GPS (RTK): short observing time, high |
| widely used in many fields. You may get to know | | | | precision and high speed of offering the |
| the GPS GSM tracking. It also plays an important | | | | coordinate. In the GPS positioning, it appears |
| role in the road and bridge building. It has fully | | | | simpler, more convenient, faster and more reliable. |
| changed the used measuring method. It serves | | | | With the progress of the science and technology, |
| the people in a better way. We will discuss the | | | | the GPS tends to be with technology, network, |
| GPS application in the construction. | | | | integration and intelligentization. It will offer people |
| The principle of GPS leveling | | | | more effeciency and convenience. |
| If the users have the device which can receive, | | | | GPS shows better performance than the |
| track, change and measure the GPS signal, they | | | | Electronic Total Station. The total station is the |
| can conduct the navigating measurement with the | | | | three-demensional measuring system composed |
| GPS signal. People classify it according to the | | | | of electric measurement, electronic distance |
| principle and function. The one is the static | | | | measurement and data storage cell. It can |
| positioning. It means that the GPS receiver is | | | | automatically display the measuring result, and can |
| involed in the static measuring on each flow stand. | | | | exchange the information with the peripheral |
| It's static in the capturing and tracking the GPS | | | | equipments. |
| satellite. | | | | Because the equipment can realize the system |
| In the observing process, the receiver receives | | | | integration perfectly, people usually name it the |
| the simultaneous observation data from the | | | | total station electronic tacheometer. Compared |
| standard station and satellite. The receiver | | | | with it, GPS is more powerful. It doesn't cost |
| measures the spreading time of GPS signal with | | | | much manpower and material. It features with |
| high precision. It will calculate the three-dimensional | | | | high precision, low cost, snap action, interference |
| coordinate of the users according to the GPS | | | | rejection and high reliability. |
| satellite location. | | | | You can complete the measuring of the area with |
| The other one is the kenamatic positioning. The | | | | a radius of 15 kilometers by setting one station. |
| GPS receiver measures the running orbit of a | | | | Much time is saved compared with the tradional |
| running object. The initialization work should be | | | | method. One people can do the observing and get |
| done before the measurements. Then the flow | | | | the three-dimensional coordinate. |
| stand will do the observing automaically according | | | | All in all, the GPS technology will be maturer and |
| to the scheduled sample interval. The location of | | | | maturer with the constant progress of the |
| the sample point will be fixed with the | | | | science and technology. Some shortages existed |
| simutaneous observing data of the base station. | | | | at present will be made up in the future work. In |
| The GPS positioning technology is widely used in | | | | the future bridge and road construction, it will |
| the fields of the engineering survey. The Real | | | | better serve people and bring benefits to the all |
| Time Kinematic makes the technology possible to | | | | humanity. |
| be used in the engineering measuring. The | | | | |