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4 Measuring Principles and Techniques …
An advantage of positional method consists in that determination of an object
position is carried out without consideration or even knowledge of an earlier traveled
distance, it has a quite high accuracy. Positional methods have a wide spread in
maritime and aerial navigation. The disadvantages are discretion in fixing of an object
position and possibility of an object coordinates determination only in operational
zone of radio-navigational system, i.e., not an autonomous method.
Dead reckoning is called a method of an object position coordinates determination based on calculation of traveled distance relatively to the known initial (reference) position of an object. For dead reckoning, it is necessary to have information
on movement direction of an object and its acceleration or movement velocity relatively to Earth. Herewith, a traveled distance by an object is calculated by double
integration of acceleration or by single integration of velocity in time.
The method advantage is a possibility of permanent receiving of information
on object position, an autonomous method. The main disadvantage of the deadreckoning method concludes in errors increasing of an object positioning in time.
In practice, all three examined methods of object positioning are frequently used
in combination.
4 Measuring Principles and Techniques …
An advantage of positional method consists in that determination of an object
position is carried out without consideration or even knowledge of an earlier traveled
distance, it has a quite high accuracy. Positional methods have a wide spread in
maritime and aerial navigation. The disadvantages are discretion in fixing of an object
position and possibility of an object coordinates determination only in operational
zone of radio-navigational system, i.e., not an autonomous method.
Dead reckoning is called a method of an object position coordinates determination based on calculation of traveled distance relatively to the known initial (reference) position of an object. For dead reckoning, it is necessary to have information
on movement direction of an object and its acceleration or movement velocity relatively to Earth. Herewith, a traveled distance by an object is calculated by double
integration of acceleration or by single integration of velocity in time.
The method advantage is a possibility of permanent receiving of information
on object position, an autonomous method. The main disadvantage of the deadreckoning method concludes in errors increasing of an object positioning in time.
In practice, all three examined methods of object positioning are frequently used
in combination.