PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-21:57:40
G02     201.7          30.3               14.5 +/-    1.51      25.2 +/-    1.51  0.210 / 0.330
G06     163.9          64.5               14.7 +/-    0.74      16.1 +/-    0.74  0.150 / 0.330
G12     305.0          12.1                8.7 +/-    2.91      23.3 +/-    2.91  0.080 / 0.150
G17     27.5           55.6               12.1 +/-    0.62      14.3 +/-    0.62  0.080 / 0.120
G19     345.8          68.2               12.1 +/-    0.54      13.0 +/-    0.54  0.050 / 0.110
G24     302.8          35.6               12.3 +/-    0.92      19.3 +/-    0.92  0.050 / 0.120
G28     97.9           34.1               13.2 +/-    0.49      21.2 +/-    0.49  0.060 / 0.100