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Table 1 Quality control strategies for UCPPP AR

From: Assessment of the performance of GPS/Galileo PPP-RTK convergence using ionospheric corrections from networks with different scales

Terms

Threshold

Elevation

15°

Fractional part of SD WL ambiguity

0.25 cycles

Standard deviation of SD WL ambiguity

0.25 cycles

Successful rate of SD WL ambiguity rounding

0.99

Fractional part of SD NL ambiguity

0.25 cycles

Standard deviation of SD NL ambiguity

0.25 cycles

Successful rate of SD NL ambiguity bootstrapping

0.99

Critical value of the ratio test for SD NL AR

3.0

Critical value of the fixed failure-rate ratio test (FFRT) for SD NL AR

0.001

Minimum number of fixed ambiguities

4