PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-13:27:50
G01     110.5          23.6                8.4 +/-    2.09      17.0 +/-    2.09  0.040 / 0.030
G07     100.9          60.8                8.4 +/-    0.97       9.4 +/-    0.97  0.040 / 0.030
G08     42.2           22.4                6.3 +/-    1.38      13.0 +/-    1.38  0.080 / 0.170
G09     174.3          15.3                9.0 +/-    2.00      22.3 +/-    2.00  0.090 / 0.180
G11     92.9           42.3                9.1 +/-    0.85      12.8 +/-    0.85  0.070 / 0.110
G13     312.1          26.5                6.8 +/-    0.77      12.9 +/-    0.77  0.070 / 0.080
G17     204.3          34.6                9.0 +/-    1.31      14.4 +/-    1.31  0.040 / 0.060
G18     83.8           23.6                6.9 +/-    0.69      14.0 +/-    0.69  0.040 / 0.060
G28     310.4          60.2                6.7 +/-    1.02       7.6 +/-    1.02  0.030 / 0.040
G30     5.1            75.4                7.4 +/-    0.54       7.7 +/-    0.54  0.030 / 0.040