PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-06:27:50
G01     114.9          20.8                8.1 +/-    1.16      17.4 +/-    1.16  0.060 / 0.070
G07     92.3           63.1                6.1 +/-    0.40       6.8 +/-    0.40  0.050 / 0.050
G08     43.3           26.7                3.9 +/-    0.97       7.3 +/-    0.97  0.050 / 0.100
G09     176.3          21.5                5.8 +/-    0.95      12.2 +/-    0.95  0.040 / 0.110
G11     100.5          40.7                7.5 +/-    0.80      10.8 +/-    0.80  0.030 / 0.050
G13     316.1          21.5                1.3 +/-    1.80       2.7 +/-    1.80  0.030 / 0.050
G17     202.5          30.8                6.4 +/-    1.50      11.0 +/-    1.50  0.060 / 0.110
G28     302.7          59.2                5.3 +/-    0.84       6.0 +/-    0.84  0.060 / 0.120
G30     358.2          72.5                5.5 +/-    0.94       5.7 +/-    0.94  0.090 / 0.170