PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-00:12:40
G02     240.5          75.9                9.8 +/-    0.67      10.0 +/-    0.67  0.080 / 0.060
G05     171.3          15.9               14.8 +/-    1.70      36.0 +/-    1.70  0.040 / 0.050
G06     40.3           62.7                9.3 +/-    0.97      10.3 +/-    0.97  0.090 / 0.110
G12     320.7          48.0                8.7 +/-    1.55      11.3 +/-    1.55  0.070 / 0.130
G17     70.2           22.1                8.9 +/-    1.04      18.6 +/-    1.04  0.090 / 0.200
G19     55.9           38.9                9.7 +/-    0.57      14.4 +/-    0.57  0.080 / 0.150
G24     244.8          35.1               12.2 +/-    0.99      19.4 +/-    0.99  0.060 / 0.070
G25     316.2          12.1                7.8 +/-    5.70      20.8 +/-    5.70  0.070 / 0.080