PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-10:58:10
G01     44.3           20.1                3.9 +/-    0.85       8.4 +/-    0.85  0.040 / 0.070
G06     177.9          31.6                8.3 +/-    2.36      14.1 +/-    2.36  0.060 / 0.070
G13     244.4          25.6                6.5 +/-    1.83      12.4 +/-    1.83  0.080 / 0.210
G15     276.4          14.2                3.7 +/-    1.40       9.4 +/-    1.40  0.080 / 0.220
G17     355.5          73.4                5.6 +/-    0.66       5.8 +/-    0.66  0.040 / 0.030
G19     265.8          67.7                4.5 +/-    0.56       4.8 +/-    0.56  0.040 / 0.030
G24     318.5          13.3                0.9 +/-    2.85       2.3 +/-    2.85  0.170 / 0.260
G28     65.0           49.0                4.8 +/-    0.73       6.2 +/-    0.73  0.160 / 0.260
G30     152.8          33.6                7.9 +/-    1.02      12.9 +/-    1.02  0.060 / 0.130