PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-05:58:00
G05     50.1           13.3                0.4 +/-    0.87       0.9 +/-    0.87  0.150 / 0.270
G10     237.8          14.1                5.9 +/-    4.61      15.0 +/-    4.61  0.110 / 0.270
G13     72.8           36.4                4.3 +/-    0.71       6.7 +/-    0.71  0.080 / 0.150
G15     118.8          53.8                5.8 +/-    0.67       7.0 +/-    0.67  0.080 / 0.160
G16     311.6          13.4                2.5 +/-    1.67       6.4 +/-    1.67  0.180 / 0.410
G20     283.1          71.7                5.4 +/-    0.50       5.7 +/-    0.50  0.210 / 0.390
G21     315.6          48.8                3.5 +/-    0.53       4.5 +/-    0.53  0.040 / 0.040
G26     283.6          20.5                3.7 +/-    1.37       8.0 +/-    1.37  0.040 / 0.050
G29     157.8          69.6                4.8 +/-    1.28       5.0 +/-    1.28  0.040 / 0.060