Finding the repeat times of the GPS constellation

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Long GPS coordinate time series: Multipath and geometry effects (2009, methodology): “…[ 24 ] In order to provide a non time variable reference orbit, we adopted an artificial configuration that used a fixed 24 satellite constellation, each with a fixed orbit repeat period of 24 h minus 246 s, close to the average GPS satellite orbital repeat time [ Agnew and Larson , 2007].”
On the nature of GPS draconitic year periodic pattern in multivariate position time series (2013, background): “However, the repeat time of the GPS constellation has an average value over the day corresponding to a daily advance of 246.8 s [Agnew and Larson, 2007].”
Anomalous harmonics in the spectra of GPS position estimates (2008, methodology): “8 s, which aliases to the same period of about 350 days for the standard 24-hour sampling used by the IGS (Agnew and Larson, 2007). Any local directiondependent observational biases, such as due to multipath, could be expected to show up with a 350-day repeat period. Since high-frequency multipath v”
Characterization of periodic variations in the GPS satellite clocks (2008, background): “(2007) confirm the suspected significance of systematic once-per-revolution orbital errors and demonstrate that those are largest during eclipse seasons when the satellites in a given orbital plane pass through the Earth’s shadow twice daily (For reference, Agnew and Larson (2007) report an average ”