PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-17:27:40
G01     125.5          13.0               12.3 +/-    3.07      32.1 +/-    3.07  0.030 / 0.040
G07     57.7           69.5               10.5 +/-    0.47      11.1 +/-    0.47  0.040 / 0.040
G08     50.1           40.0                9.6 +/-    0.93      14.0 +/-    0.93  0.040 / 0.050
G09     178.0          34.0               13.7 +/-    0.90      22.2 +/-    0.90  0.040 / 0.060
G11     117.2          36.2               11.5 +/-    0.89      17.8 +/-    0.89  0.030 / 0.040
G13     320.6          13.1               10.3 +/-    2.23      26.8 +/-    2.23  0.030 / 0.040
G17     201.2          14.3               13.0 +/-    2.24      32.9 +/-    2.24  0.050 / 0.060
G18     102.3          17.6               11.0 +/-    1.17      25.8 +/-    1.17  0.040 / 0.060
G28     279.8          54.1               13.0 +/-    0.94      15.6 +/-    0.94  0.070 / 0.120
G30     336.6          62.8               10.2 +/-    0.60      11.4 +/-    0.60  0.070 / 0.120