PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-14:42:50
G01     104.4          26.9               11.6 +/-    0.69      21.7 +/-    0.69  0.030 / 0.030
G07     110.8          56.3               10.8 +/-    0.72      12.7 +/-    0.72  0.030 / 0.040
G08     41.7           17.8                7.6 +/-    0.89      17.6 +/-    0.89  0.070 / 0.130
G09     173.4          10.1               10.6 +/-    1.27      29.6 +/-    1.27  0.070 / 0.140
G11     84.7           42.6               11.0 +/-    1.43      15.3 +/-    1.43  0.040 / 0.060
G13     307.3          30.4                9.5 +/-    1.58      16.6 +/-    1.58  0.040 / 0.070
G17     207.0          40.3               13.0 +/-    1.05      18.8 +/-    1.05  0.030 / 0.050
G18     77.2           24.5                9.1 +/-    0.61      18.0 +/-    0.61  0.030 / 0.040
G28     323.1          61.3                9.1 +/-    1.05      10.2 +/-    1.05  0.040 / 0.080
G30     32.8           79.2               10.3 +/-    0.63      10.5 +/-    0.63  0.050 / 0.090