PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-14:27:50
G01     59.5           30.1                5.8 +/-    0.90      10.1 +/-    0.90  0.070 / 0.140
G06     180.2          15.4               12.9 +/-    1.39      31.8 +/-    1.39  0.060 / 0.150
G07     142.1          19.1                8.8 +/-    1.56      19.9 +/-    1.56  0.040 / 0.040
G11     47.3           20.9                4.6 +/-    0.68       9.9 +/-    0.68  0.030 / 0.040
G13     264.5          34.7                8.8 +/-    0.78      14.1 +/-    0.78  0.080 / 0.180
G15     295.9          15.7                4.8 +/-    2.62      11.7 +/-    2.62  0.060 / 0.270
G17     269.8          78.9                7.5 +/-    0.65       7.6 +/-    0.65  0.020 / 0.020
G19     233.8          53.3                9.9 +/-    1.21      12.0 +/-    1.21  0.030 / 0.030
G28     36.9           56.3                6.1 +/-    0.49       7.2 +/-    0.49  0.050 / 0.080
G30     143.7          54.0                8.1 +/-    0.74       9.7 +/-    0.74  0.040 / 0.100