PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-08:57:30
G01     43.8           19.7                3.3 +/-    1.04       7.3 +/-    1.04  0.040 / 0.070
G06     178.8          31.2                7.5 +/-    2.27      12.7 +/-    2.27  0.070 / 0.060
G13     243.4          25.1                6.6 +/-    2.05      12.9 +/-    2.05  0.030 / 0.030
G15     275.1          14.0                4.6 +/-    1.56      11.7 +/-    1.56  0.030 / 0.030
G17     355.5          73.1                6.0 +/-    0.83       6.2 +/-    0.83  0.170 / 0.260
G19     267.5          67.9                4.9 +/-    0.60       5.3 +/-    0.60  0.160 / 0.290
G24     318.3          14.1                3.4 +/-    1.27       8.7 +/-    1.27  0.090 / 0.240
G28     66.1           48.6                4.2 +/-    0.41       5.4 +/-    0.41  0.090 / 0.160
G30     152.9          31.8                8.1 +/-    1.28      13.7 +/-    1.28  0.070 / 0.130