PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-16:12:40
G08     311.5          18.6                5.5 +/-    1.28      12.6 +/-    1.28  0.030 / 0.050
G10     325.3          59.0                4.8 +/-    0.70       5.5 +/-    0.70  0.030 / 0.040
G14     215.7          27.5                4.7 +/-    1.69       8.6 +/-    1.69  0.050 / 0.090
G15     46.2           14.8                4.5 +/-    1.70      11.4 +/-    1.70  0.050 / 0.090
G20     29.8           61.8                4.6 +/-    0.64       5.1 +/-    0.64  0.100 / 0.190
G21     130.2          57.4                7.1 +/-    0.68       8.3 +/-    0.68  0.080 / 0.180
G24     74.3           28.4                5.6 +/-    0.65      10.1 +/-    0.65  0.030 / 0.030
G27     283.4          36.8                6.2 +/-    1.02       9.5 +/-    1.02  0.030 / 0.040
G32     219.7          47.2                8.1 +/-    1.55      10.6 +/-    1.55  0.070 / 0.090