PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-20:27:40
G02     19.6           65.3                9.9 +/-    0.42      10.8 +/-    0.42  0.030 / 0.040
G05     152.7          52.2               13.4 +/-    0.67      16.4 +/-    0.67  0.030 / 0.050
G06     48.9           22.6                8.5 +/-    1.77      17.6 +/-    1.77  0.130 / 0.120
G12     210.8          77.0               11.4 +/-    0.45      11.7 +/-    0.45  0.140 / 0.120
G19     90.1           18.6               10.0 +/-    2.53      22.8 +/-    2.53  0.060 / 0.070
G25     308.9          45.8               10.5 +/-    1.56      14.0 +/-    1.56  0.050 / 0.080
G29     299.1          19.3               10.6 +/-    1.12      23.7 +/-    1.12  0.020 / 0.030