PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-09:57:40
G10     277.4          43.5                2.7 +/-    1.16       3.7 +/-    1.16  0.050 / 0.080
G13     38.7           11.5                2.4 +/-    6.59       6.4 +/-    6.59  0.050 / 0.090
G15     50.9           40.0                5.1 +/-    1.17       7.4 +/-    1.17  0.050 / 0.040
G20     54.7           38.9                3.7 +/-    1.07       5.5 +/-    1.07  0.040 / 0.040
G21     37.9           76.4                4.7 +/-    1.29       4.8 +/-    1.29  0.100 / 0.140
G24     112.8          19.4                6.0 +/-    1.43      13.4 +/-    1.43  0.120 / 0.150
G27     312.9          26.4                4.2 +/-    1.76       8.0 +/-    1.76  0.310 / 0.520
G29     168.3          21.0                5.7 +/-    2.10      12.3 +/-    2.10  0.190 / 0.390
G32     205.8          18.8                5.7 +/-    2.92      12.9 +/-    2.92  0.110 / 0.050