The analysis of errors global Differential Geometry and Global Analysis PDF using the Global Positioning System is important for understanding how GPS works, and for knowing what magnitude of errors should be expected. The Global Positioning System makes corrections for receiver clock errors and other effects but there are still residual errors which are not corrected. GPS receiver position is computed based on data received from the satellites.
Författare: D. Ferus.
Errors depend on geometric dilution of precision and the sources listed in the table below. This section’s factual accuracy is disputed. Relevant discussion may be found on Talk:Error analysis for the Global Positioning System. These UERE errors are therefore used in computing standard deviations.
PDOP is computed as a function of receiver and satellite positions. The error diagram on the left shows the inter relationship of indicated receiver position, true receiver position, and the intersection of the four sphere surfaces. The position calculated by a GPS receiver requires the current time, the position of the satellite and the measured delay of the received signal. The position accuracy is primarily dependent on the satellite position and signal delay. To measure the delay, the receiver compares the bit sequence received from the satellite with an internally generated version.