PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-17:43:00
G02     54.1           37.4               13.3 +/-    0.90      20.2 +/-    0.90  0.050 / 0.050
G05     77.7           69.4               14.1 +/-    0.79      14.9 +/-    0.79  0.040 / 0.060
G12     187.2          40.2               15.6 +/-    2.21      22.6 +/-    2.21  0.090 / 0.620
G13     134.9          10.5                7.4 +/-   30.52      20.5 +/-   30.52  0.160 / 0.590
G20     204.5          52.6               17.8 +/-    0.76      21.7 +/-    0.76  0.060 / 0.070
G21     266.3          14.7               15.6 +/-    2.78      39.1 +/-    2.78  0.040 / 0.060
G25     243.2          55.8               16.2 +/-    1.61      19.1 +/-    1.61  0.030 / 0.020
G29     327.3          52.6               12.8 +/-    0.68      15.7 +/-    0.68  0.030 / 0.020