PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-18:42:50
G02     209.8          44.9               12.3 +/-    1.44      16.6 +/-    1.44  0.060 / 0.080
G06     105.3          79.3               11.5 +/-    0.28      11.7 +/-    0.28  0.040 / 0.090
G12     315.3          28.2                9.3 +/-    2.29      16.9 +/-    2.29  0.050 / 0.120
G17     50.7           36.9                8.7 +/-    0.92      13.3 +/-    0.92  0.070 / 0.120
G19     29.5           54.6                9.9 +/-    1.31      11.8 +/-    1.31  0.050 / 0.070
G24     282.5          41.8                9.2 +/-    1.90      13.1 +/-    1.90  0.050 / 0.100
G28     115.4          21.1               10.6 +/-    1.24      22.7 +/-    1.24  0.030 / 0.030