PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-20:57:40
G10     254.7          29.2               16.1 +/-    1.42      28.6 +/-    1.42  0.030 / 0.050
G13     50.5           28.6               11.4 +/-    1.04      20.6 +/-    1.04  0.040 / 0.050
G15     77.3           56.0               14.3 +/-    0.89      16.9 +/-    0.89  0.090 / 0.270
G16     294.8          13.6               13.1 +/-    0.92      33.6 +/-    0.92  0.110 / 0.200
G18     277.1          59.0               16.5 +/-    0.82      18.9 +/-    0.82  0.080 / 0.290
G20     46.1           44.4               14.2 +/-    1.33      19.3 +/-    1.33  0.070 / 0.310
G21     342.7          64.7               13.9 +/-    0.71      15.2 +/-    0.71  0.090 / 0.140
G26     267.4          13.4               15.2 +/-    1.48      39.4 +/-    1.48  0.080 / 0.180
G27     322.0          10.3              -16.1 +/-   19.28     -44.7 +/-   19.28  0.040 / 0.070
G29     164.0          40.0               16.4 +/-    1.59      23.9 +/-    1.59  0.050 / 0.070