PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/08-12:27:50
G01     115.1          20.7                6.1 +/-    1.36      13.3 +/-    1.36  0.040 / 0.040
G07     91.2           64.0                4.2 +/-    0.84       4.7 +/-    0.84  0.030 / 0.030
G08     43.0           26.2                4.7 +/-    1.37       9.0 +/-    1.37  0.100 / 0.150
G09     174.8          19.6                5.6 +/-    1.38      12.5 +/-    1.38  0.100 / 0.150
G11     99.4           41.3                6.2 +/-    1.21       8.8 +/-    1.21  0.050 / 0.070
G13     315.2          23.1                2.0 +/-    1.91       4.1 +/-    1.91  0.050 / 0.080
G17     202.5          30.1                5.5 +/-    2.27       9.7 +/-    2.27  0.110 / 0.220
G18     89.0           22.3                4.3 +/-    1.78       8.9 +/-    1.78  0.080 / 0.310
G28     300.7          58.8                2.8 +/-    0.99       3.2 +/-    0.99  0.060 / 0.060
G30     351.7          71.4                4.7 +/-    0.33       4.9 +/-    0.33  0.080 / 0.060