PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/29-05:27:40
G05     49.8           13.8                3.6 +/-    1.37       9.3 +/-    1.37  0.130 / 0.250
G10     237.5          13.6                5.3 +/-    1.82      13.7 +/-    1.82  0.100 / 0.250
G13     73.6           36.4                8.1 +/-    1.23      12.5 +/-    1.23  0.210 / 0.190
G15     120.1          53.5                8.4 +/-    0.62      10.1 +/-    0.62  0.080 / 0.180
G16     312.0          13.3                3.7 +/-    2.13       9.5 +/-    2.13  0.040 / 0.040
G20     273.0          68.1                7.0 +/-    0.71       7.4 +/-    0.71  0.040 / 0.040
G21     314.9          48.3                5.2 +/-    0.91       6.7 +/-    0.91  0.070 / 0.070
G26     284.1          20.6                7.5 +/-    1.80      16.3 +/-    1.80  0.040 / 0.060
G29     157.5          70.4                8.0 +/-    0.69       8.4 +/-    0.69  0.030 / 0.030