PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-05:58:00
G05     48.2           17.7                1.1 +/-    0.60       2.6 +/-    0.60  0.190 / 0.420
G13     80.0           36.7                4.3 +/-    0.94       6.6 +/-    0.94  0.130 / 0.540
G15     127.3          50.5                6.6 +/-    0.47       8.2 +/-    0.47  0.060 / 0.120
G16     316.4          11.5                2.4 +/-    4.42       6.5 +/-    4.42  0.070 / 0.150
G20     270.3          70.3                5.3 +/-    0.64       5.6 +/-    0.64  0.200 / 0.350
G21     310.5          45.3                4.0 +/-    1.85       5.4 +/-    1.85  0.120 / 0.360
G25     201.7          13.5                4.5 +/-    1.39      11.7 +/-    1.39  0.040 / 0.050
G26     289.3          20.9                5.3 +/-    2.20      11.4 +/-    2.20  0.040 / 0.050
G29     153.0          75.9                5.7 +/-    0.50       5.8 +/-    0.50  0.030 / 0.040