If you wish to contribute or participate in the discussions about articles you are invited to contact the Editor
Receiver noise: Difference between revisions
Carlos.Lopez (talk | contribs) No edit summary |
Carlos.Lopez (talk | contribs) No edit summary |
||
Line 23: | Line 23: | ||
[[Category:Fundamentals]] | [[Category:Fundamentals]] | ||
[[Category:GNSS Measurements and Data Preprocessing]] | |||
[[Category:Receivers]] |
Revision as of 15:24, 8 August 2011
Fundamentals | |
---|---|
Title | Receiver noise |
Author(s) | J. Sanz Subirana, JM. Juan Zornoza and M. Hernandez-Pajares, University of Catalunia, Spain. |
Level | Medium |
Year of Publication | 2011 |
The receiver code noise is a white-like error and can be smoothed using a low pass filter.
This error affects both the code and carrier measurements, but in different magnitude: The accuracy of pseudorange measurements is about 1% of the wavelength ("chip"), or better. This means, for instance, a noise with a maximum value of 3 m for the GPS civil C/A code and about 30 cm for the protected P codes (see table 1).However, when smoothing the code with the carrier phase, the C/A receiver noise can be reduced down to about 50 cm.
The carrier phase noise is at the level of few millimetres (about the 1% of carrier phase wavelength).
Code and carrier phase noise depends on the signal strength, which varies with the elevation angle.