PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-02:27:40
G02     34.7           54.2                9.1 +/-    0.55      10.9 +/-    0.55  0.030 / 0.040
G05     135.1          62.8               11.7 +/-    0.59      13.0 +/-    0.59  0.050 / 0.040
G06     54.0           15.5                7.1 +/-    1.85      17.4 +/-    1.85  0.050 / 0.060
G12     199.2          67.7                9.9 +/-    1.16      10.6 +/-    1.16  0.110 / 0.080
G19     100.0          10.5                9.6 +/-    2.13      26.5 +/-    2.13  0.040 / 0.050
G25     297.5          52.9                9.7 +/-    1.11      11.8 +/-    1.11  0.030 / 0.050
G29     307.3          27.7                5.4 +/-    1.11      10.0 +/-    1.11  0.060 / 0.060