PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-13:43:10
G02     203.6          34.9               12.0 +/-    0.94      19.1 +/-    0.94  0.160 / 0.330
G03     58.0           9.7                 7.1 +/-    1.71      19.9 +/-    1.71  0.150 / 0.300
G06     161.7          69.3               10.0 +/-    0.96      10.6 +/-    0.96  0.100 / 0.240
G12     308.3          15.7                5.3 +/-    1.49      12.9 +/-    1.49  0.170 / 0.240
G17     39.4           46.4                4.5 +/-    2.22       5.9 +/-    2.22  0.060 / 0.100
G19     8.3            63.6                5.3 +/-    0.81       5.8 +/-    0.81  0.080 / 0.090
G24     298.6          37.5                4.9 +/-    2.41       7.4 +/-    2.41  0.040 / 0.040
G28     104.1          30.0                6.7 +/-    1.14      11.7 +/-    1.14  0.050 / 0.070