PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-06:27:30
G10     249.2          25.2                6.5 +/-    1.62      12.7 +/-    1.62  0.040 / 0.040
G13     55.4           31.2                3.9 +/-    1.18       6.6 +/-    1.18  0.040 / 0.040
G15     88.7           57.3                4.8 +/-    1.27       5.6 +/-    1.27  0.120 / 0.370
G16     297.0          15.5                2.2 +/-    1.68       5.4 +/-    1.68  0.100 / 0.310
G20     336.5          72.6                4.6 +/-    0.71       4.8 +/-    0.71  0.030 / 0.040
G21     331.7          59.1                3.2 +/-    0.81       3.6 +/-    0.81  0.040 / 0.040
G26     268.3          16.3                5.5 +/-    1.69      13.2 +/-    1.69  0.030 / 0.050
G29     164.5          52.0                5.3 +/-    0.80       6.5 +/-    0.80  0.040 / 0.040