PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-16:43:10
G02     50.9           40.1               10.9 +/-    0.69      15.9 +/-    0.69  0.060 / 0.080
G05     89.9           70.5               13.0 +/-    0.51      13.7 +/-    0.51  0.050 / 0.070
G12     188.5          45.3               15.0 +/-    2.02      20.2 +/-    2.02  0.030 / 0.030
G20     203.0          47.5               17.6 +/-    1.50      22.9 +/-    1.50  0.020 / 0.040
G21     263.1          12.4               13.2 +/-    2.04      35.1 +/-    2.04  0.050 / 0.080
G25     252.5          57.9               13.5 +/-    0.64      15.7 +/-    0.64  0.040 / 0.070