The TDA-5000 is one of the best examples of modern electronic total stations. This instrument is capable of solving the widest range of geodetic tasks, from creating surveying grounds for topoplans to 3D object modeling. Built-in targeting and automatic tracking function allows to automate the work completely, and the ability to record information (made measurements) on PCMCI card installed in the device - to perform tasks even easier and faster. The declared manufacturer accuracy of this device is 0.5" when measuring horizontal and vertical angles; when measuring distances 0.5 mm. The following was investigated: accuracy and limits of automatic aiming; accuracy of the angular part of the device; accuracy of the rangefinder part of the device. All researches of TDA-5000 showed the following: the angle measurement error is 0.3"; error of homing on ГК 0.6", on ВК 1.4"; mean square error of distance measurement 0.2 mm; maximum deviation angle of the initial point of search from the center of prism 1.5°; maximum deviation angle of sighting ray from the normal to the prism 27° The received results show that the device is suitable for highly accurate tasks. It is very advantageous to use such instruments for applied tasks because the TDA-5000 system is highly mobile.
