PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-23:42:40
G07     336.0          59.0                6.1 +/-    0.75       7.0 +/-    0.75  0.110 / 0.140
G08     97.5           52.7                6.8 +/-    0.47       8.3 +/-    0.47  0.060 / 0.140
G09     191.5          72.2                7.7 +/-    0.45       8.1 +/-    0.45  0.110 / 0.070
G11     146.1          13.7                7.9 +/-    1.14      20.1 +/-    1.14  0.130 / 0.090
G23     156.0          38.7                8.9 +/-    0.88      13.2 +/-    0.88  0.030 / 0.040
G27     52.4           29.8                6.1 +/-    1.33      10.7 +/-    1.33  0.030 / 0.040
G28     239.5          32.0                8.5 +/-    2.25      14.2 +/-    2.25  0.030 / 0.030
G30     306.1          39.7                6.9 +/-    1.29      10.1 +/-    1.29  0.030 / 0.040