How to decide the place with the transmitter for tracking on a map.


Outline.
  • It is the method of deciding the position of a transmitter for the long-distance transmitter for tracking on the map with magnification low as much as possible using the receiver for tracking.
  • The compass for mountain climbing which investigates the receiver for tracking(KRS-300S) which attached Yagi Antenna, and a direction, a protractor, and the city area map with low magnification are needed.
  • Compass is first attached in Yagi Antenna and it ties to a receiver.
  • If an electric wave is noticed with a receiver, compass will be seen and the direction of a transmitter will be checked in the place. A its present location is plotted on a map and a straight line is drawn in the direction from there. A direction is checked similarly shortly in the 100-300m away place. The interval to leave adjusts the distance of a measuring point in the size of the distance of a transmitter which can be notified. The present location at that time is plotted on a map, and a straight line is drawn in the direction from there. The point that two straight lines crossed becomes the point with a transmitter. It will become more exact if it measures by three piaces.
  • If it is this method, it will not move about with here and there, and decision of a point can be performed on a map. The point which crosses if an error is in decision of the direction using compass goes wrong considerably.
  • Since a direction tends to be out of order under the influence of a building, cautions are required in a city area. When a high building is in the surroundings, the place distant from there as much as possible is chosen. Since an electric wave reflects on the wall of a building, it mistakes there with the direction with a dispatch object. In addition, when investigating a direction, a direction is investigated in positions (a footbridge, roof of a building, etc.) higher than a surrounding building. moreover -- a point -- 4-5m -- moving -- a direction -- abbreviation -- it checks whether it is the same