PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-14:57:40
G02     36.3           53.0               10.2 +/-    0.45      12.4 +/-    0.45  0.030 / 0.040
G05     140.0          63.4               14.6 +/-    0.92      16.1 +/-    0.92  0.030 / 0.040
G06     54.6           16.4                8.2 +/-    1.46      19.7 +/-    1.46  0.090 / 0.160
G12     199.2          65.7               11.6 +/-    0.86      12.6 +/-    0.86  0.110 / 0.180
G20     199.1          28.1               14.2 +/-    1.24      25.9 +/-    1.24  0.030 / 0.040
G25     291.1          56.2               11.1 +/-    0.62      13.1 +/-    0.62  0.030 / 0.040
G29     312.2          35.2                9.4 +/-    1.56      14.8 +/-    1.56  0.040 / 0.050