PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-10:42:40
G01     319.5          16.7                3.8 +/-    3.20       9.1 +/-    3.20  0.110 / 0.310
G08     262.5          13.8                3.5 +/-    1.70       8.9 +/-    1.70  0.130 / 0.340
G10     77.4           54.2                3.9 +/-    0.70       4.7 +/-    0.70  0.040 / 0.040
G11     305.7          21.2                3.9 +/-    2.26       8.4 +/-    2.26  0.040 / 0.050
G14     283.8          67.7                4.8 +/-    0.66       5.1 +/-    0.66  0.100 / 0.270
G18     306.5          38.4                2.8 +/-    1.56       4.3 +/-    1.56  0.080 / 0.270
G22     301.3          14.2                3.7 +/-    1.34       9.5 +/-    1.34  0.210 / 0.260
G31     174.6          42.2                5.7 +/-    1.02       8.0 +/-    1.02  0.190 / 0.260
G32     8.6            67.4                3.5 +/-    0.40       3.7 +/-    0.40  0.130 / 0.310