PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-05:42:40
G10     259.9          34.7                6.9 +/-    1.74      11.0 +/-    1.74  0.040 / 0.060
G13     45.5           22.7                4.3 +/-    0.96       8.9 +/-    0.96  0.040 / 0.040
G15     66.8           52.5                8.4 +/-    0.31      10.2 +/-    0.31  0.060 / 0.090
G16     289.6          13.5                4.9 +/-    1.29      12.6 +/-    1.29  0.060 / 0.090
G20     285.4          56.9                7.5 +/-    0.92       8.8 +/-    0.92  0.160 / 0.260
G21     352.4          67.9                5.1 +/-    1.22       5.5 +/-    1.22  0.120 / 0.300
G24     125.5          10.2              -13.8 +/-   23.39     -38.3 +/-   23.39  0.070 / 0.250
G26     261.6          11.2                4.8 +/-    2.95      13.1 +/-    2.95  0.060 / 0.210
G27     321.8          11.8                0.2 +/-   19.63       0.6 +/-   19.63  0.220 / 0.350
G29     164.2          35.1                7.1 +/-    0.88      11.3 +/-    0.88  0.170 / 0.370