PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/09-09:27:50
G01     45.8           21.7                2.2 +/-    2.70       4.6 +/-    2.70  0.040 / 0.040
G06     179.0          28.4                6.0 +/-    2.04      10.9 +/-    2.04  0.030 / 0.060
G13     246.4          27.0                5.7 +/-    1.96      10.6 +/-    1.96  0.190 / 0.240
G15     278.2          14.8               -0.9 +/-    1.29      -2.3 +/-    1.29  0.270 / 0.290
G17     347.6          75.2                4.6 +/-    0.32       4.7 +/-    0.32  0.020 / 0.020
G19     259.9          66.0                4.4 +/-    0.55       4.7 +/-    0.55  0.020 / 0.020
G24     318.9          11.5               -6.3 +/-   24.55     -17.1 +/-   24.55  0.130 / 0.170
G28     61.8           50.0                4.4 +/-    0.51       5.6 +/-    0.51  0.090 / 0.180
G30     151.8          35.2                6.8 +/-    1.10      10.7 +/-    1.10  0.070 / 0.120