PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-18:28:10
G02     214.8          56.4               11.4 +/-    0.73      13.4 +/-    0.73  0.060 / 0.060
G06     60.8           74.3               10.8 +/-    0.41      11.2 +/-    0.41  0.060 / 0.070
G12     318.9          37.4                8.0 +/-    1.72      12.2 +/-    1.72  0.030 / 0.020
G17     55.7           33.7                9.9 +/-    1.71      16.0 +/-    1.71  0.030 / 0.020
G19     33.3           52.7               11.5 +/-    1.06      14.1 +/-    1.06  0.080 / 0.070
G24     266.5          42.3               11.0 +/-    1.51      15.5 +/-    1.51  0.050 / 0.070
G28     121.2          15.3               10.6 +/-    1.53      26.2 +/-    1.53  0.060 / 0.050