PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/04-18:28:00
G01     127.4          11.4                6.8 +/-   41.81      18.5 +/-   41.81  0.040 / 0.050
G07     50.0           69.8               12.1 +/-    0.63      12.8 +/-    0.63  0.030 / 0.050
G08     52.5           42.7               10.8 +/-    0.51      15.1 +/-    0.51  0.100 / 0.310
G09     178.6          36.9               15.4 +/-    0.60      23.7 +/-    0.60  0.100 / 0.410
G11     120.3          34.8               15.3 +/-    1.03      24.4 +/-    1.03  0.040 / 0.040
G13     321.3          11.0                1.3 +/-   29.48       3.6 +/-   29.48  0.030 / 0.040
G17     201.2          11.2                7.4 +/-   34.04      20.0 +/-   34.04  0.050 / 0.070
G18     104.7          16.4               13.1 +/-    1.94      31.6 +/-    1.94  0.060 / 0.070
G28     276.0          52.9               13.4 +/-    1.29      16.3 +/-    1.29  0.080 / 0.100
G30     334.3          61.2               11.3 +/-    0.79      12.8 +/-    0.79  0.080 / 0.120