It is the level of phone jammer the customer asks

It is the level of phone jammer the customer asks or needs.
Receiver two echo time difference to calculate the water depth. (5) Determination of deposits can be used to measure the coal zone, excavation and debris cubic capacity. (6) large-scale project progress monitoring (7) a large proportion of DEM and updates (8) urban planning, arable land, resource and environmental monitoring survey (9) Virtual Reality contrast of 6.3 laser scanning and close range photogrammetry laser scanning and close range photogrammetry has many similarities, but due to its basic working principles of different practical applications, they also have some differences, as follows: (1) raw data format. scan data obtained by a point with a three-dimensional coordinates of a point cloud can be directly on point cloud in space measurements. To make sure the high quality and good performance of phone jammer .
Photogrammetric data obtained for pictures, a separate one for pictures can not be space measurement. (2) the requirements of the external environment. Laser scanning work during the day and night, did not affect the brightness and temperature scanning photogrammetric requirements are relatively high (such as high temperatures will produce image distortion, the night can not be photography, etc.) (3) physical access to materials. scanning system by the reflection intensity to match the similar color and true color obtained from a digital image map on the model; photogrammetry pictures from the real color. building extraction from laser scanning data and reconstruction building extraction from laser scanning data and reconstruction of the direct use of laser scan data to achieve the target three-dimensional reconstruction needs to solve the main problem is the extraction of the target feature point. And even the wavelength of signal jammer should be well commissioned.
It will determine which process and production method of signal jammer
Constructed feature lines such as boundary points, corner points, feature points and characteristics of the surface, in order to reconstruct the three-dimensional target. This paper studies the rules of building has the following characteristics: the facade of the building 's basic perpendicular to the ground; basic smooth surfaces of buildings; building material corner is basically a right angle. 9 surface features of the original data estimates data filtering building data resampling to correct building two-dimensional data of building three-dimensional data building three-dimensional plane data to match the reconstruction of 3D building models of texture data (CCD image) Figure 1 Construction things feature extraction and reconstruction of the flowchart buildings feature extraction and reconstruction process see Box 1, the specific methods and steps.