PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-02:57:50
G02     66.0           27.0                6.8 +/-    1.59      12.7 +/-    1.59  0.080 / 0.140
G05     49.9           53.0                9.5 +/-    0.49      11.6 +/-    0.49  0.070 / 0.120
G12     183.2          24.9               13.9 +/-    1.62      27.2 +/-    1.62  0.040 / 0.050
G13     122.5          20.1               11.2 +/-    1.51      24.6 +/-    1.51  0.040 / 0.040
G15     159.7          18.0               13.3 +/-    3.41      30.8 +/-    3.41  0.300 / 0.340
G20     221.3          24.4               17.2 +/-    3.48      34.1 +/-    3.48  0.310 / 0.350
G21     277.1          21.4               11.6 +/-    1.36      24.7 +/-    1.36  0.090 / 0.280
G25     228.4          46.5               12.5 +/-    2.86      16.5 +/-    2.86  0.100 / 0.260
G29     332.5          61.0               11.3 +/-    0.40      12.7 +/-    0.40  0.080 / 0.090