PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-14:58:00
G02     227.5          65.4                7.5 +/-    1.45       8.1 +/-    1.45  0.030 / 0.040
G06     43.4           63.6                5.6 +/-    0.49       6.2 +/-    0.49  0.030 / 0.040
G12     322.0          49.1                5.3 +/-    0.93       6.8 +/-    0.93  0.060 / 0.110
G17     66.4           24.9                6.0 +/-    1.39      11.8 +/-    1.39  0.080 / 0.080
G19     46.0           46.4                5.0 +/-    1.45       6.6 +/-    1.45  0.050 / 0.050
G24     249.3          38.0                7.1 +/-    1.52      10.7 +/-    1.52  0.040 / 0.050