PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-17:42:50
G02     26.1           61.4               15.2 +/-    0.53      17.1 +/-    0.53  0.030 / 0.040
G05     155.8          54.1               17.4 +/-    0.86      20.9 +/-    0.86  0.030 / 0.040
G06     50.7           21.2               10.7 +/-    0.73      22.9 +/-    0.73  0.050 / 0.070
G12     211.4          73.9               15.2 +/-    0.92      15.8 +/-    0.92  0.040 / 0.060
G19     96.3           11.8               13.6 +/-    1.02      36.4 +/-    1.02  0.090 / 0.170
G20     197.6          20.9               18.1 +/-    1.55      39.1 +/-    1.55  0.090 / 0.160
G25     302.1          52.3               15.3 +/-    1.03      18.7 +/-    1.03  0.030 / 0.050
G29     304.8          26.8               12.7 +/-    0.87      23.9 +/-    0.87  0.030 / 0.050