PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-12:42:30
G01     115.1          20.5                8.4 +/-    1.80      18.3 +/-    1.80  0.030 / 0.080
G07     93.6           61.5                5.2 +/-    0.86       5.8 +/-    0.86  0.040 / 0.030
G08     43.2           26.0                5.6 +/-    0.68      10.6 +/-    0.68  0.020 / 0.040
G09     174.5          19.6                6.4 +/-    1.41      14.3 +/-    1.41  0.030 / 0.050
G11     98.4           39.7                6.7 +/-    0.66       9.8 +/-    0.66  0.090 / 0.320
G13     316.7          20.7                3.1 +/-    1.70       6.7 +/-    1.70  0.070 / 0.350
G17     202.1          31.3                6.8 +/-    1.57      11.6 +/-    1.57  0.090 / 0.150
G28     301.1          58.8                3.5 +/-    1.00       4.1 +/-    1.00  0.090 / 0.150
G30     350.2          70.3                3.3 +/-    0.84       3.5 +/-    0.84  0.060 / 0.110