PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/28-19:42:40
G07     330.7          57.0               10.4 +/-    0.69      12.2 +/-    0.69  0.070 / 0.070
G08     107.9          52.3               12.6 +/-    0.41      15.4 +/-    0.41  0.060 / 0.080
G09     196.5          75.4               11.8 +/-    1.21      12.2 +/-    1.21  0.060 / 0.180
G11     148.3          11.8               19.9 +/-    3.12      53.3 +/-    3.12  0.070 / 0.190
G23     154.1          39.5               13.3 +/-    0.70      19.6 +/-    0.70  0.060 / 0.070
G27     55.5           31.7               10.0 +/-    0.74      16.9 +/-    0.74  0.050 / 0.100
G28     236.8          29.3               14.0 +/-    2.00      24.8 +/-    2.00  0.170 / 0.340
G30     302.7          36.6               11.6 +/-    0.82      17.8 +/-    0.82  0.120 / 0.400