PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-13:57:40
G01     58.5           29.9                6.2 +/-    2.64      10.9 +/-    2.64  0.030 / 0.040
G07     142.9          20.8                7.4 +/-    2.30      16.0 +/-    2.30  0.030 / 0.040
G11     47.1           21.5                5.2 +/-    2.14      11.0 +/-    2.14  0.090 / 0.140
G13     260.3          34.8                8.4 +/-    2.37      13.4 +/-    2.37  0.090 / 0.160
G15     295.7          15.0                4.3 +/-    2.08      10.8 +/-    2.08  0.040 / 0.050
G17     269.8          78.4                7.9 +/-    0.52       8.0 +/-    0.52  0.040 / 0.050
G18     41.1           11.4                5.8 +/-    2.33      15.7 +/-    2.33  0.120 / 0.080
G19     233.4          48.5                7.8 +/-    1.53      10.0 +/-    1.53  0.130 / 0.070
G28     37.9           56.3                5.7 +/-    0.67       6.7 +/-    0.67  0.060 / 0.110
G30     145.1          52.4                8.0 +/-    1.23       9.8 +/-    1.23  0.060 / 0.120