PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/18-12:58:00
G02     251.8          76.5                3.5 +/-    0.76       3.6 +/-    0.76  0.110 / 0.230
G05     173.4          17.0                5.0 +/-    1.74      11.9 +/-    1.74  0.130 / 0.220
G06     39.9           53.8                1.9 +/-    0.62       2.3 +/-    0.62  0.090 / 0.140
G12     321.6          58.0                2.6 +/-    1.43       3.0 +/-    1.43  0.080 / 0.120
G17     75.3           18.0                3.4 +/-    0.78       7.9 +/-    0.78  0.030 / 0.040
G19     58.4           39.1                2.6 +/-    0.57       3.8 +/-    0.57  0.040 / 0.060
G24     237.1          31.8                4.1 +/-    1.67       6.9 +/-    1.67  0.030 / 0.040
G25     317.2          19.1                2.9 +/-    1.56       6.4 +/-    1.56  0.030 / 0.040