PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-15:27:30
G02     204.2          31.9                8.6 +/-    1.23      14.4 +/-    1.23  0.090 / 0.070
G06     153.1          70.5                9.2 +/-    0.95       9.7 +/-    0.95  0.080 / 0.070
G12     309.0          19.5                7.0 +/-    1.33      15.7 +/-    1.33  0.080 / 0.190
G17     37.4           48.0                8.7 +/-    0.40      11.2 +/-    0.40  0.080 / 0.240
G19     351.9          66.6                7.0 +/-    1.11       7.5 +/-    1.11  0.040 / 0.030
G24     296.3          39.3                8.7 +/-    0.84      12.8 +/-    0.84  0.030 / 0.040
G28     102.3          31.4                9.2 +/-    0.93      15.6 +/-    0.93  0.050 / 0.040