PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-15:42:50
G02     217.9          61.0               11.8 +/-    1.24      13.3 +/-    1.24  0.050 / 0.110
G06     53.7           73.3               10.0 +/-    0.76      10.3 +/-    0.76  0.060 / 0.090
G12     319.4          38.1                8.3 +/-    1.06      12.5 +/-    1.06  0.090 / 0.080
G17     61.2           28.6                7.2 +/-    0.47      13.1 +/-    0.47  0.050 / 0.060
G19     44.6           46.0                7.8 +/-    0.43      10.4 +/-    0.43  0.030 / 0.030
G24     264.6          40.9               11.4 +/-    1.12      16.3 +/-    1.12  0.040 / 0.040
G28     124.7          11.2                8.5 +/-    2.13      23.1 +/-    2.13  0.060 / 0.070