PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-18:12:50
G01     119.5          17.7               14.0 +/-    0.92      32.6 +/-    0.92  0.040 / 0.080
G07     78.7           67.1               12.7 +/-    0.37      13.6 +/-    0.37  0.040 / 0.080
G08     45.9           34.2               10.0 +/-    0.67      16.1 +/-    0.67  0.030 / 0.040
G09     177.2          26.6               15.0 +/-    0.69      28.3 +/-    0.69  0.040 / 0.040
G11     108.6          39.8               13.5 +/-    1.37      19.7 +/-    1.37  0.040 / 0.060
G13     318.0          18.9               11.3 +/-    1.24      25.5 +/-    1.24  0.040 / 0.050
G17     202.6          21.2               16.0 +/-    2.66      34.3 +/-    2.66  0.040 / 0.100
G18     95.1           20.7               12.9 +/-    0.68      27.8 +/-    0.68  0.050 / 0.090
G28     292.5          57.4               13.1 +/-    0.85      15.3 +/-    0.85  0.030 / 0.040
G30     348.3          69.0               12.1 +/-    0.43      12.9 +/-    0.43  0.020 / 0.040