PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-18:13:00
G01     126.9          11.8               17.6 +/-    2.72      47.2 +/-    2.72  0.040 / 0.050
G07     51.9           69.7               14.6 +/-    0.60      15.5 +/-    0.60  0.040 / 0.060
G08     51.9           42.0               13.1 +/-    0.66      18.5 +/-    0.66  0.030 / 0.050
G09     178.4          36.1               17.0 +/-    1.06      26.4 +/-    1.06  0.030 / 0.040
G11     119.5          35.1               16.8 +/-    0.47      26.7 +/-    0.47  0.080 / 0.370
G13     321.2          11.6                6.3 +/-   21.79      16.9 +/-   21.79  0.090 / 0.430
G17     201.2          12.0               17.2 +/-    4.29      45.9 +/-    4.29  0.070 / 0.100
G18     104.1          16.7               15.3 +/-    1.00      36.5 +/-    1.00  0.070 / 0.120
G28     277.0          53.2               15.2 +/-    1.07      18.5 +/-    1.07  0.050 / 0.080
G30     334.9          61.6               14.0 +/-    0.54      15.7 +/-    0.54  0.050 / 0.090