PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-17:57:50
G01     120.5          16.9               11.9 +/-    1.40      28.1 +/-    1.40  0.040 / 0.080
G07     75.5           67.6               10.7 +/-    0.24      11.5 +/-    0.24  0.040 / 0.080
G08     46.5           35.1                9.7 +/-    0.52      15.4 +/-    0.52  0.040 / 0.030
G09     177.3          27.7               11.1 +/-    1.42      20.3 +/-    1.42  0.040 / 0.040
G11     110.1          39.3               13.3 +/-    0.97      19.5 +/-    0.97  0.040 / 0.100
G13     318.5          18.0               10.6 +/-    2.33      24.4 +/-    2.33  0.040 / 0.090
G17     202.3          20.1               12.8 +/-    2.05      28.2 +/-    2.05  0.080 / 0.140
G18     96.3           20.2               11.1 +/-    1.02      24.4 +/-    1.02  0.070 / 0.110
G28     290.2          56.9               12.2 +/-    0.59      14.2 +/-    0.59  0.040 / 0.060
G30     345.9          67.9               10.2 +/-    0.60      10.9 +/-    0.60  0.040 / 0.060