PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-15:27:40
G02     200.7          15.9               11.9 +/-    1.93      29.0 +/-    1.93  0.140 / 0.300
G06     172.2          50.8                9.4 +/-    0.84      11.8 +/-    0.84  0.130 / 0.460
G13     231.1          15.1               10.7 +/-    1.84      26.5 +/-    1.84  0.120 / 0.240
G17     22.7           59.9                9.0 +/-    1.05      10.2 +/-    1.05  0.100 / 0.160
G19     321.2          71.9                9.6 +/-    0.71      10.0 +/-    0.71  0.050 / 0.040
G24     312.9          26.2                7.7 +/-    1.34      14.7 +/-    1.34  0.030 / 0.030
G28     85.3           41.0                8.8 +/-    1.31      12.6 +/-    1.31  0.040 / 0.040
G30     157.2          18.8               10.9 +/-    0.81      24.6 +/-    0.81  0.040 / 0.050