PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-05:58:10
G05     50.2           12.9                2.4 +/-    2.50       6.2 +/-    2.50  0.040 / 0.040
G10     238.1          14.4                3.8 +/-    1.38       9.5 +/-    1.38  0.040 / 0.040
G13     72.3           36.3                5.4 +/-    0.91       8.4 +/-    0.91  0.090 / 0.270
G15     118.0          54.1                6.7 +/-    0.53       8.1 +/-    0.53  0.090 / 0.270
G16     311.2          13.5                1.8 +/-    2.10       4.7 +/-    2.10  0.100 / 0.160
G20     284.5          71.9                5.0 +/-    0.69       5.3 +/-    0.69  0.060 / 0.170
G21     316.0          49.1                4.4 +/-    0.78       5.6 +/-    0.78  0.040 / 0.060
G26     283.1          20.4                5.2 +/-    3.22      11.4 +/-    3.22  0.030 / 0.060
G29     158.1          69.1                5.7 +/-    0.43       6.1 +/-    0.43  0.040 / 0.030