PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-04:57:50
G05     50.3           12.9                1.1 +/-    2.52       2.9 +/-    2.52  0.110 / 0.310
G10     238.3          14.6                5.8 +/-    1.61      14.7 +/-    1.61  0.140 / 0.260
G13     71.9           36.2                4.3 +/-    0.89       6.7 +/-    0.89  0.040 / 0.040
G15     118.4          54.2                5.9 +/-    0.37       7.1 +/-    0.37  0.040 / 0.040
G16     310.8          13.7                3.5 +/-    1.68       9.1 +/-    1.68  0.060 / 0.180
G20     268.9          64.7                6.1 +/-    0.32       6.6 +/-    0.32  0.130 / 0.200
G21     315.9          48.9                4.7 +/-    1.12       6.0 +/-    1.12  0.030 / 0.030
G26     282.8          20.4                5.5 +/-    2.57      11.9 +/-    2.57  0.030 / 0.030
G29     158.4          69.2                6.0 +/-    0.84       6.4 +/-    0.84  0.040 / 0.080