PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-23:42:30
G03     239.4          68.0                8.9 +/-    0.34       9.5 +/-    0.34  0.040 / 0.050
G09     303.3          17.8                7.8 +/-    2.22      18.2 +/-    2.22  0.050 / 0.050
G14     100.0          14.2                8.5 +/-    2.89      21.7 +/-    2.89  0.030 / 0.040
G16     134.7          58.3               11.1 +/-    1.24      12.9 +/-    1.24  0.040 / 0.040
G22     196.0          56.2                9.4 +/-    0.50      11.0 +/-    0.50  0.190 / 0.220
G23     318.6          48.3                7.9 +/-    0.78      10.1 +/-    0.78  0.210 / 0.270
G26     71.7           53.3                7.5 +/-    0.46       9.1 +/-    0.46  0.090 / 0.120
G31     51.5           21.5                5.9 +/-    2.47      12.6 +/-    2.47  0.160 / 0.120