PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-13:28:10
G01     222.0          12.7                6.5 +/-    2.49      17.2 +/-    2.49  0.150 / 0.200
G03     263.0          70.9                6.7 +/-    0.81       7.0 +/-    0.81  0.140 / 0.180
G09     297.7          11.3               -8.4 +/-   23.98     -22.6 +/-   23.98  0.130 / 0.600
G14     90.4           24.0                7.9 +/-    1.43      15.8 +/-    1.43  0.130 / 0.270
G16     138.0          51.9                9.1 +/-    0.71      11.2 +/-    0.71  0.070 / 0.070
G22     194.9          62.0                7.4 +/-    0.50       8.3 +/-    0.50  0.060 / 0.070
G23     315.6          46.3                7.0 +/-    0.82       9.2 +/-    0.82  0.040 / 0.060
G26     82.3           53.4                6.9 +/-    0.76       8.3 +/-    0.76  0.050 / 0.050
G31     48.4           24.9                6.4 +/-    1.61      12.4 +/-    1.61  0.040 / 0.030