PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-00:42:30
G07     7.4            66.9                6.6 +/-    0.79       7.1 +/-    0.79  0.170 / 0.130
G08     69.1           50.6                6.8 +/-    0.93       8.5 +/-    0.93  0.130 / 0.130
G09     181.6          54.3                8.5 +/-    0.57      10.2 +/-    0.57  0.040 / 0.040
G11     134.6          24.5               10.8 +/-    1.90      21.3 +/-    1.90  0.040 / 0.040
G23     159.6          22.3                8.5 +/-    1.61      17.8 +/-    1.61  0.190 / 0.110
G27     41.6           18.9                5.2 +/-    2.33      11.9 +/-    2.33  0.180 / 0.120
G28     255.6          43.9                7.9 +/-    3.92      10.9 +/-    3.92  0.040 / 0.030
G30     320.5          51.0                6.6 +/-    0.60       8.3 +/-    0.60  0.030 / 0.030