PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-19:57:40
G02     219.1          62.4               14.5 +/-    1.31      16.2 +/-    1.31  0.040 / 0.070
G06     50.4           70.1               12.6 +/-    0.34      13.3 +/-    0.34  0.050 / 0.060
G12     320.2          41.3               12.7 +/-    0.55      18.1 +/-    0.55  0.080 / 0.070
G17     59.4           31.3               10.8 +/-    1.42      18.3 +/-    1.42  0.070 / 0.100
G19     40.3           49.1               12.2 +/-    1.34      15.5 +/-    1.34  0.060 / 0.070
G24     260.0          40.9               14.8 +/-    4.19      21.2 +/-    4.19  0.070 / 0.070
G28     124.7          11.3               14.3 +/-    2.46      38.8 +/-    2.46  0.030 / 0.050