PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-17:42:50
G02     202.0          19.7               16.9 +/-    2.55      37.4 +/-    2.55  0.140 / 0.460
G06     168.8          57.5               14.4 +/-    0.84      16.7 +/-    0.84  0.150 / 0.650
G13     226.7          11.4               14.2 +/-    2.51      38.5 +/-    2.51  0.130 / 0.340
G17     28.5           55.5                9.8 +/-    1.18      11.6 +/-    1.18  0.150 / 0.290
G19     340.0          70.2               11.9 +/-    0.59      12.5 +/-    0.59  0.070 / 0.140
G24     309.4          30.2                8.6 +/-    1.23      14.9 +/-    1.23  0.070 / 0.140
G28     91.5           37.9               11.0 +/-    1.17      16.5 +/-    1.17  0.040 / 0.050
G30     158.1          14.0               17.2 +/-    2.69      43.7 +/-    2.69  0.030 / 0.060