PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-17:57:40
G02     203.1          30.8               14.0 +/-    0.59      24.1 +/-    0.59  0.210 / 0.410
G06     158.8          67.7               14.5 +/-    1.08      15.5 +/-    1.08  0.170 / 0.300
G12     307.1          16.1               11.8 +/-    1.94      28.5 +/-    1.94  0.080 / 0.120
G17     33.3           51.3               11.5 +/-    0.46      14.3 +/-    0.46  0.080 / 0.130
G19     348.1          67.5               12.4 +/-    0.90      13.3 +/-    0.90  0.090 / 0.080
G24     299.5          37.7               14.3 +/-    0.94      21.6 +/-    0.94  0.100 / 0.110
G28     100.1          32.8               12.6 +/-    1.22      20.8 +/-    1.22  0.070 / 0.130