PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-23:57:30
G10     289.3          48.4                9.8 +/-    4.03      12.6 +/-    4.03  0.110 / 0.140
G15     47.5           33.9               10.0 +/-    1.18      16.2 +/-    1.18  0.100 / 0.110
G18     344.5          66.7               10.7 +/-    0.42      11.6 +/-    0.42  0.040 / 0.030
G20     68.1           20.6               10.8 +/-    1.36      23.3 +/-    1.36  0.040 / 0.030
G21     79.2           76.0               11.4 +/-    1.00      11.7 +/-    1.00  0.070 / 0.150
G24     104.4          24.3               12.5 +/-    0.62      24.9 +/-    0.62  0.080 / 0.130
G27     304.1          32.8               10.6 +/-    2.72      17.5 +/-    2.72  0.050 / 0.070
G32     209.3          25.2               14.3 +/-    1.42      27.9 +/-    1.42  0.060 / 0.090