PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-20:12:50
G01     61.2           30.9               12.9 +/-    0.75      22.1 +/-    0.75  0.090 / 0.280
G07     141.9          23.6               13.7 +/-    1.25      27.7 +/-    1.25  0.100 / 0.290
G11     49.2           25.3               11.4 +/-    1.55      22.2 +/-    1.55  0.060 / 0.100
G13     263.9          35.5               13.9 +/-    1.40      21.8 +/-    1.40  0.080 / 0.090
G15     295.1          16.2                9.8 +/-    1.51      23.6 +/-    1.51  0.080 / 0.190
G17     250.1          72.5               14.2 +/-    0.43      14.8 +/-    0.43  0.080 / 0.230
G18     43.2           13.8                9.3 +/-    1.70      23.9 +/-    1.70  0.030 / 0.060
G19     231.5          48.5               12.9 +/-    0.39      16.6 +/-    0.39  0.040 / 0.060
G28     34.7           56.9               12.5 +/-    0.71      14.7 +/-    0.71  0.080 / 0.140
G30     142.8          52.3               14.1 +/-    1.18      17.4 +/-    1.18  0.060 / 0.150