PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/14-15:12:40
G02     67.0           26.0                7.2 +/-    0.89      13.8 +/-    0.89  0.030 / 0.040
G05     50.3           55.2                6.7 +/-    0.49       8.0 +/-    0.49  0.030 / 0.040
G12     184.4          24.9                9.8 +/-    2.04      19.2 +/-    2.04  0.070 / 0.180
G13     122.9          20.8               12.3 +/-    0.82      26.6 +/-    0.82  0.070 / 0.190
G15     158.3          19.2               12.5 +/-    1.19      28.1 +/-    1.19  0.040 / 0.120
G20     214.7          67.8               10.0 +/-    0.75      10.8 +/-    0.75  0.080 / 0.130
G21     279.5          25.6                8.1 +/-    0.89      15.7 +/-    0.89  0.040 / 0.040
G25     224.8          45.0                8.3 +/-    1.22      11.2 +/-    1.22  0.040 / 0.040
G29     341.5          68.2                6.0 +/-    0.63       6.4 +/-    0.63  0.050 / 0.070