PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-05:42:30
G10     253.9          29.2                6.7 +/-    2.36      11.9 +/-    2.36  0.200 / 0.410
G13     50.5           27.9                2.5 +/-    2.52       4.6 +/-    2.52  0.100 / 0.440
G15     78.4           56.2                5.1 +/-    0.56       6.0 +/-    0.56  0.040 / 0.040
G16     291.3          15.2                3.9 +/-    1.19       9.7 +/-    1.19  0.030 / 0.040
G20     326.6          70.9                4.7 +/-    0.99       5.0 +/-    0.99  0.050 / 0.050
G21     338.4          62.7                4.6 +/-    0.69       5.1 +/-    0.69  0.030 / 0.060
G26     263.0          14.0                4.3 +/-    3.54      10.9 +/-    3.54  0.050 / 0.030
G29     166.0          46.0                5.0 +/-    0.75       6.6 +/-    0.75  0.040 / 0.040