PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-18:12:30
G02     204.6          31.2               12.3 +/-    0.77      21.1 +/-    0.77  0.030 / 0.050
G06     157.2          70.1                9.8 +/-    0.69      10.3 +/-    0.69  0.030 / 0.060
G12     308.7          17.2                8.5 +/-    2.56      20.2 +/-    2.56  0.100 / 0.210
G17     39.3           46.5                9.5 +/-    1.06      12.5 +/-    1.06  0.100 / 0.150
G19     8.2            63.7               10.0 +/-    0.67      11.0 +/-    0.67  0.080 / 0.110
G24     299.1          37.3               10.5 +/-    0.82      15.9 +/-    0.82  0.060 / 0.100
G28     103.6          30.6               10.5 +/-    0.78      18.2 +/-    0.78  0.030 / 0.030