PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-14:12:30
G02     202.3          24.6                8.2 +/-    3.75      16.2 +/-    3.75  0.050 / 0.090
G06     165.0          61.7                8.7 +/-    0.62       9.7 +/-    0.62  0.050 / 0.090
G17     24.5           57.5                6.6 +/-    0.40       7.6 +/-    0.40  0.090 / 0.240
G19     348.1          68.7                5.6 +/-    0.39       5.9 +/-    0.39  0.090 / 0.210
G24     305.3          33.2                6.3 +/-    1.39      10.4 +/-    1.39  0.080 / 0.130
G28     90.9           41.3                7.9 +/-    0.49      11.3 +/-    0.49  0.070 / 0.090