PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-04:57:40
G10     242.4          20.5                5.6 +/-    3.52      12.2 +/-    3.52  0.150 / 0.190
G13     63.6           33.7                6.5 +/-    1.00      10.5 +/-    1.00  0.160 / 0.350
G15     105.0          56.6                9.3 +/-    0.92      10.9 +/-    0.92  0.040 / 0.050
G16     309.0          13.1                3.9 +/-    3.13      10.0 +/-    3.13  0.030 / 0.050
G20     257.8          44.1                8.2 +/-    3.36      11.1 +/-    3.36  0.070 / 0.130
G21     324.6          54.3                5.6 +/-    1.07       6.7 +/-    1.07  0.080 / 0.130
G26     280.7          18.2                6.0 +/-    2.06      13.9 +/-    2.06  0.040 / 0.040
G29     157.3          57.4                8.7 +/-    0.64      10.1 +/-    0.64  0.030 / 0.040