PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/30-14:12:40
G02     41.9           47.9                3.5 +/-    0.61       4.5 +/-    0.61  0.030 / 0.040
G05     121.0          69.7                5.5 +/-    0.56       5.9 +/-    0.56  0.040 / 0.060
G12     188.6          53.7                4.7 +/-    1.60       5.7 +/-    1.60  0.070 / 0.040
G25     267.5          60.2                2.7 +/-    0.92       3.1 +/-    0.92  0.040 / 0.040
G29     315.6          37.3                3.7 +/-    0.88       5.6 +/-    0.88  0.030 / 0.030