Why is accuracy needed for coordinate transformations?
* Lucha, G. V., On the Consequences of Neglecting Measurement
Accuracy Issues in Live and Virtual interactions”, SIW Spring 1997
In the past, it has been difficult to measure positions on the surface of the Earth to better than 1 metre.
- This situation is changing due to new technology developments.
- GPS now can achieve absolute accuracy of about 21 cm (SEP 90%) over large regions.
Real-world applications mostly use relative coordinate systems
- Dynamically correct location errors by using on-board sensors.
In the simulation environment, both absolute and relative spatial referencing must be accurately portrayed.
Mixing of live & synthetic environments has special accuracy requirements*.
Mission planning, rehearsal, & conduct of real operations have situation-dependent accuracy requirements.