PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-14:57:50
G10     274.7          42.9                5.6 +/-    1.56       7.7 +/-    1.56  0.030 / 0.040
G13     39.1           12.6                4.7 +/-    2.92      12.4 +/-    2.92  0.030 / 0.040
G15     53.7           44.4                5.1 +/-    0.75       7.0 +/-    0.75  0.090 / 0.130
G20     311.7          63.0                5.3 +/-    0.77       5.9 +/-    0.77  0.090 / 0.120
G21     37.6           75.4                6.1 +/-    0.69       6.3 +/-    0.69  0.100 / 0.280
G24     110.5          18.3                8.0 +/-    0.94      18.3 +/-    0.94  0.180 / 0.270
G27     316.5          21.8                4.1 +/-    2.14       8.6 +/-    2.14  0.100 / 0.040
G29     167.3          22.7                4.7 +/-    2.05       9.7 +/-    2.05  0.070 / 0.040
G32     205.6          14.3                6.6 +/-    2.00      16.8 +/-    2.00  0.040 / 0.060