PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-09:58:20
G08     269.2          19.3                5.5 +/-    3.35      12.4 +/-    3.35  0.130 / 0.310
G10     57.9           58.4                6.7 +/-    0.54       7.7 +/-    0.54  0.140 / 0.390
G14     261.8          65.6                7.1 +/-    1.03       7.7 +/-    1.03  0.040 / 0.020
G18     313.0          31.8                5.3 +/-    0.95       8.9 +/-    0.95  0.030 / 0.020
G20     93.1           38.0                7.2 +/-    1.02      10.8 +/-    1.02  0.060 / 0.060
G21     154.0          16.0                4.9 +/-    2.28      11.9 +/-    2.28  0.050 / 0.050
G24     40.2           10.6                2.3 +/-    1.89       6.4 +/-    1.89  0.140 / 0.270
G27     235.2          18.2                5.5 +/-    4.47      12.6 +/-    4.47  0.100 / 0.220
G31     179.4          26.9                5.4 +/-    1.75      10.1 +/-    1.75  0.060 / 0.140
G32     305.9          74.3                7.5 +/-    0.82       7.8 +/-    0.82  0.060 / 0.110