PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-18:57:40
G08     267.4          17.9               10.8 +/-    1.60      25.1 +/-    1.60  0.130 / 0.220
G10     60.7           58.8               11.5 +/-    0.57      13.2 +/-    0.57  0.250 / 0.260
G11     311.9          16.7               10.1 +/-    2.09      24.0 +/-    2.09  0.050 / 0.090
G14     267.8          66.4               10.8 +/-    1.04      11.7 +/-    1.04  0.070 / 0.130
G18     93.0           34.6               12.2 +/-    0.78      19.6 +/-    0.78  0.120 / 0.210
G21     153.0          10.3               17.8 +/-    3.79      49.3 +/-    3.79  0.100 / 0.270
G24     40.1           10.9               10.5 +/-    2.82      28.6 +/-    2.82  0.030 / 0.020
G27     230.5          15.3               12.4 +/-    1.31      30.7 +/-    1.31  0.030 / 0.030
G31     179.5          29.3               13.1 +/-    1.47      23.2 +/-    1.47  0.040 / 0.050
G32     336.3          74.1               11.4 +/-    0.44      11.8 +/-    0.44  0.030 / 0.040