PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-20:42:30
G02     45.0           45.9                9.4 +/-    0.54      12.5 +/-    0.54  0.040 / 0.050
G05     110.2          71.0               12.9 +/-    0.46      13.6 +/-    0.46  0.040 / 0.050
G12     188.3          49.2               10.6 +/-    2.03      13.6 +/-    2.03  0.040 / 0.070
G20     200.7          43.9               14.1 +/-    0.93      19.4 +/-    0.93  0.040 / 0.060
G25     257.0          59.9               11.5 +/-    0.47      13.1 +/-    0.47  0.030 / 0.030
G29     319.3          42.5               10.9 +/-    2.15      15.2 +/-    2.15  0.030 / 0.030