PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-15:42:30
G02     37.6           51.9                8.8 +/-    0.38      10.9 +/-    0.38  0.030 / 0.040
G05     137.7          64.7               11.7 +/-    0.84      12.8 +/-    0.84  0.030 / 0.040
G06     55.7           14.7                7.3 +/-    3.47      18.3 +/-    3.47  0.070 / 0.190
G12     197.0          63.6               10.5 +/-    1.06      11.6 +/-    1.06  0.070 / 0.150
G20     199.2          30.3               10.7 +/-    2.22      18.6 +/-    2.22  0.030 / 0.040
G25     287.4          57.3               10.4 +/-    0.90      12.1 +/-    0.90  0.030 / 0.040
G29     313.2          36.1                9.5 +/-    1.48      14.8 +/-    1.48  0.110 / 0.200