PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-08:57:50
G02     39.2           50.2                4.3 +/-    0.53       5.4 +/-    0.53  0.030 / 0.040
G05     128.2          65.6                6.6 +/-    0.75       7.2 +/-    0.75  0.030 / 0.040
G06     55.3           15.8                3.8 +/-    0.84       9.4 +/-    0.84  0.030 / 0.030
G12     198.1          64.1                7.2 +/-    1.12       7.9 +/-    1.12  0.030 / 0.040
G20     200.9          26.8                4.3 +/-    1.06       8.1 +/-    1.06  0.040 / 0.060
G25     290.6          55.5                4.4 +/-    0.83       5.3 +/-    0.83  0.040 / 0.050
G29     311.6          33.3                3.5 +/-    1.36       5.7 +/-    1.36  0.060 / 0.140