PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-17:12:30
G07     1.9            66.1               12.1 +/-    0.60      13.1 +/-    0.60  0.030 / 0.050
G08     73.8           52.3               12.3 +/-    1.05      15.1 +/-    1.05  0.030 / 0.040
G09     181.2          55.6               14.6 +/-    0.65      17.3 +/-    0.65  0.040 / 0.050
G11     135.3          23.7               14.9 +/-    2.15      30.0 +/-    2.15  0.060 / 0.060
G23     157.9          20.4               13.8 +/-    1.23      30.2 +/-    1.23  0.020 / 0.030
G27     42.8           20.8               10.6 +/-    1.69      23.0 +/-    1.69  0.040 / 0.040
G28     253.1          42.2               14.6 +/-    2.23      20.5 +/-    2.23  0.050 / 0.140
G30     316.4          47.5               12.4 +/-    0.79      16.2 +/-    0.79  0.070 / 0.170