PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-20:57:40
G10     286.9          47.5                9.8 +/-    1.23      12.7 +/-    1.23  0.040 / 0.050
G15     47.7           34.1                9.5 +/-    0.64      15.4 +/-    0.64  0.040 / 0.050
G18     343.1          66.9               10.0 +/-    1.11      10.8 +/-    1.11  0.060 / 0.100
G20     66.4           22.9               10.5 +/-    0.54      21.5 +/-    0.54  0.050 / 0.090
G21     76.9           75.5               12.3 +/-    0.63      12.6 +/-    0.63  0.080 / 0.200
G24     106.2          23.4               11.8 +/-    1.33      23.9 +/-    1.33  0.070 / 0.180
G27     305.9          31.8               11.5 +/-    1.47      19.4 +/-    1.47  0.080 / 0.180
G32     209.0          22.4               13.5 +/-    1.66      28.0 +/-    1.66  0.090 / 0.210