PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-11:58:00
G05     47.0           21.8                2.8 +/-    0.56       6.0 +/-    0.56  0.070 / 0.130
G13     85.7           36.7                4.2 +/-    1.02       6.5 +/-    1.02  0.060 / 0.140
G15     130.9          47.9                6.5 +/-    1.02       8.5 +/-    1.02  0.050 / 0.070
G18     240.3          39.3                4.8 +/-    0.97       7.0 +/-    0.97  0.060 / 0.080
G20     7.8            76.7                4.5 +/-    0.67       4.6 +/-    0.67  0.120 / 0.240
G21     309.5          45.6                2.9 +/-    0.71       3.8 +/-    0.71  0.110 / 0.260
G25     203.3          16.3                5.2 +/-    1.82      12.6 +/-    1.82  0.040 / 0.040
G26     295.3          20.1                5.0 +/-    2.20      10.9 +/-    2.20  0.050 / 0.040
G29     145.9          77.0                5.3 +/-    0.45       5.4 +/-    0.45  0.040 / 0.110