PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-19:42:40
G08     302.6          21.5               10.8 +/-    1.69      22.8 +/-    1.69  0.060 / 0.090
G10     344.6          61.6               10.1 +/-    0.59      11.3 +/-    0.59  0.080 / 0.100
G14     222.6          38.2               13.4 +/-    0.97      20.1 +/-    0.97  0.040 / 0.070
G18     51.6           55.3               10.8 +/-    0.39      12.9 +/-    0.39  0.050 / 0.070
G21     139.7          45.8               14.9 +/-    1.76      19.9 +/-    1.76  0.050 / 0.090
G24     67.2           29.7               12.0 +/-    0.87      21.2 +/-    0.87  0.050 / 0.090
G27     264.0          35.7               13.2 +/-    1.02      20.7 +/-    1.02  0.040 / 0.040
G32     230.6          57.2               12.4 +/-    1.27      14.4 +/-    1.27  0.030 / 0.050