PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/13-14:57:50
G02     60.3           31.6                7.5 +/-    0.81      12.8 +/-    0.81  0.040 / 0.040
G05     59.9           62.8                9.2 +/-    0.40      10.2 +/-    0.40  0.030 / 0.050
G12     186.2          33.7                9.8 +/-    1.11      15.9 +/-    1.11  0.060 / 0.100
G13     129.7          15.0               13.7 +/-    1.93      34.0 +/-    1.93  0.050 / 0.080
G15     163.0          12.4               12.0 +/-    1.84      31.9 +/-    1.84  0.040 / 0.060
G20     208.5          58.5               11.7 +/-    1.43      13.4 +/-    1.43  0.040 / 0.050
G21     272.4          20.5                6.2 +/-    2.31      13.6 +/-    2.31  0.070 / 0.260
G25     235.2          51.7                9.5 +/-    0.94      11.8 +/-    0.94  0.090 / 0.260
G29     333.7          59.9                7.9 +/-    0.70       8.9 +/-    0.70  0.190 / 0.390