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Fig. 6.


Differential TEC (dTEC) solutions (referenced to CS002) for four stations (CS302, RS106, RS210, and RS508) in the Toothbrush cluster direction. CS302 and RS106 are relatively close to the reference station, while the other two stations are farther away. Due to direction-dependent effects and the incompleteness of the skymodel, some errors in the estimation of the dTEC are present. Because of phase periodicity, the chi-square in TEC space has multiple local minima that results in discrete jumps of the dTEC values we recovered.

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