PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-06:57:30
G02     32.5           56.4                2.9 +/-    1.05       3.5 +/-    1.05  0.030 / 0.030
G05     142.1          59.6                5.9 +/-    0.64       6.7 +/-    0.64  0.030 / 0.030
G06     51.4           20.6                1.6 +/-    3.13       3.4 +/-    3.13  0.220 / 0.540
G12     209.5          72.3                3.5 +/-    0.49       3.6 +/-    0.49  0.230 / 0.400
G19     97.5           11.7                5.0 +/-    2.43      13.6 +/-    2.43  0.290 / 0.290
G20     200.4          18.1                3.7 +/-    2.40       8.5 +/-    2.40  0.190 / 0.220
G25     302.3          50.4                3.1 +/-    3.83       3.8 +/-    3.83  0.030 / 0.020
G29     305.6          26.6                2.8 +/-    1.06       5.3 +/-    1.06  0.030 / 0.030