The observation error observations to distinguish between error and receiver antenna relative to the placement error of the measurement site.
Based on experience, is generally believed that the observed resolution error of about 1% of the signal wavelength. Therefore, know that the carrier phase resolution error than the code phase is not small, this error is a random error, may be appropriate to increase the observations will be significantly weakened its impact.
Receiver antenna relative to the placement error of the observatory center, the main antenna set is not taken in error and the amount of antenna error in precision positioning work must be serious, careful operation, in order to minimize this error impact.
Although GPS receivers high precision quartz clocks, its frequency stability can reach 10 -11 square, but the impact on the carrier phase observation can not be ignored.
Deal with the receiver clock error is more effective method is the difference between the observation time of the receiver clock as is relevant, thereby establishing a clock error model, and that for a time in the form of the polynomial, then the measurements Adjustment calculation of the uniform solution, the coefficients of the polynomial, and thus the receiver clock error correction.
The most sophisticated methods of observat