PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-19:57:40
G02     30.6           57.4                8.6 +/-    0.93      10.0 +/-    0.93  0.030 / 0.030
G05     140.2          61.8               10.4 +/-    0.67      11.6 +/-    0.67  0.030 / 0.040
G06     54.1           14.4                6.6 +/-    2.55      16.6 +/-    2.55  0.120 / 0.180
G12     191.3          65.6                8.8 +/-    0.69       9.6 +/-    0.69  0.120 / 0.270
G19     98.6           12.6                8.4 +/-    2.22      22.1 +/-    2.22  0.030 / 0.030
G25     297.0          53.7                8.2 +/-    1.08       9.9 +/-    1.08  0.030 / 0.040
G29     306.4          26.4                9.2 +/-    1.38      17.3 +/-    1.38  0.050 / 0.050