PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-11:58:00
G01     47.3           23.4                3.3 +/-    1.30       6.7 +/-    1.30  0.130 / 0.300
G06     176.1          29.5                5.2 +/-    2.05       9.2 +/-    2.05  0.170 / 0.360
G11     43.6           11.1                3.0 +/-    1.56       8.3 +/-    1.56  0.170 / 0.160
G13     246.5          28.5                5.1 +/-    1.99       9.1 +/-    1.99  0.130 / 0.140
G15     285.5          13.7                3.2 +/-    1.90       8.2 +/-    1.90  0.060 / 0.070
G17     338.8          76.9                5.6 +/-    0.38       5.7 +/-    0.38  0.060 / 0.080
G19     249.0          58.0                7.4 +/-    1.02       8.6 +/-    1.02  0.100 / 0.170
G24     318.2          13.2               -7.9 +/-   24.63     -20.6 +/-   24.63  0.070 / 0.120
G28     56.5           52.1                4.4 +/-    1.06       5.4 +/-    1.06  0.090 / 0.110
G30     151.8          39.4                6.8 +/-    0.69      10.0 +/-    0.69  0.130 / 0.140