PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-02:28:00
G02     34.7           54.2                8.8 +/-    1.22      10.5 +/-    1.22  0.030 / 0.040
G05     135.1          62.8               11.3 +/-    0.34      12.5 +/-    0.34  0.030 / 0.040
G06     54.0           15.5                6.5 +/-    3.15      15.9 +/-    3.15  0.020 / 0.030
G12     199.2          67.7               11.3 +/-    0.29      12.1 +/-    0.29  0.030 / 0.040
G19     100.0          10.5               11.0 +/-    2.02      30.4 +/-    2.02  0.060 / 0.070
G25     297.5          52.9               10.3 +/-    3.06      12.6 +/-    3.06  0.040 / 0.070
G29     307.3          27.7                7.4 +/-    1.12      13.6 +/-    1.12  0.270 / 0.150