PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-14:27:40
G01     75.0           33.2                8.1 +/-    1.38      13.3 +/-    1.38  0.040 / 0.040
G07     135.3          34.2                9.7 +/-    1.35      15.7 +/-    1.35  0.030 / 0.040
G11     55.7           32.4                6.4 +/-    0.93      10.6 +/-    0.93  0.070 / 0.090
G13     278.7          38.0                8.9 +/-    1.24      13.4 +/-    1.24  0.070 / 0.100
G15     308.0          12.9                6.2 +/-    1.50      16.1 +/-    1.50  0.060 / 0.130
G17     227.7          66.4                8.9 +/-    0.91       9.6 +/-    0.91  0.050 / 0.110
G18     51.6           19.6                7.0 +/-    0.86      15.5 +/-    0.86  0.030 / 0.060
G19     221.6          35.6               11.0 +/-    1.13      17.2 +/-    1.13  0.040 / 0.060
G28     12.9           60.1                7.6 +/-    0.57       8.7 +/-    0.57  0.060 / 0.090
G30     131.2          66.5                9.2 +/-    0.63      10.0 +/-    0.63  0.040 / 0.070