PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-13:12:50
G01     116.8          19.5                8.2 +/-    1.59      18.3 +/-    1.59  0.040 / 0.030
G07     87.0           65.1                7.5 +/-    0.46       8.2 +/-    0.46  0.040 / 0.030
G08     43.7           28.3                5.6 +/-    0.82      10.2 +/-    0.82  0.130 / 0.210
G09     175.3          21.7                6.4 +/-    0.82      13.6 +/-    0.82  0.140 / 0.150
G11     102.3          40.9                8.5 +/-    0.78      12.2 +/-    0.78  0.050 / 0.080
G13     316.3          21.6                3.5 +/-    1.02       7.4 +/-    1.02  0.040 / 0.070
G17     202.1          27.6                7.0 +/-    1.36      12.9 +/-    1.36  0.040 / 0.050
G18     91.1           21.7                7.6 +/-    0.77      16.0 +/-    0.77  0.040 / 0.050
G28     297.3          58.3                5.2 +/-    1.09       6.0 +/-    1.09  0.030 / 0.040
G30     349.0          70.1                5.5 +/-    1.00       5.8 +/-    1.00  0.030 / 0.050