coordinates

A methodology for determining the mechanical trajectory and spatial coordinates of unmanned aircrafts by means of kinematic projection is described.  The suggested methodology consists in the formation of two moving independent centers of kinematic projection by launching intercepting drones into space.  Electromagnetic radio waves emitted by unmanned aircrafts pierce an unknown flying object and generate two independent projecting rays intersecting at the place of searching a flying object.  At that, the instantaneous (at a certain moment) projection of the point of spatial location of the

The article deals with the problem of navigating indoors in conditions of satellite signal unavailability. In this case, alternative sources of positioning are used to determine the location of the objects. Use for navigation tasks inside the premises of the smartphone allows you to get comprehensive data on its operation. To solve the problem of navigation, the most important elements of the data sets is the unique identifier of the monitored device and the relative power level of the signal received from it.

An experimental system for measuring the parameters of the flight trajectory of its own object-radio beacon, in particular, in the unmanned aerial vehicle (UAV) is developed and tested. Passive radio-location system is used. The difference-phase, difference-time and difference-frequency methods are compared. The first one provides the sufficient precision, not more than 1 deg. in the range of 30 to 140 deg. The phase measuring device is based on chip AD8302, operating at the frequency range up to 2.7 GHz.

Purpose: This study assumed: experimental determination of the accuracy of measuring relatively short distances, typical for performing survey, planning and marking engineering geodesy works using a dual frequency GNSS receiver under different conditions of observation, and using RTN-technology on mountain area of the Precarpathian region. Methodology: To investigate the accuracy of measuring short distances, seven experiments that differed in mutual position of permanent stations and physical geographical conditions of outside conditions were performed.