PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-16:42:10
G02     46.5           44.5                7.1 +/-    1.92       9.7 +/-    1.92  0.040 / 0.050
G05     97.2           71.0                7.4 +/-    0.69       7.8 +/-    0.69  0.040 / 0.060
G12     185.1          45.0                9.0 +/-    1.75      12.1 +/-    1.75  0.060 / 0.080
G25     255.7          58.7                8.8 +/-    0.75      10.1 +/-    0.75  0.040 / 0.070
G29     319.5          42.1                8.2 +/-    1.04      11.6 +/-    1.04  0.040 / 0.030