PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-17:57:50
G02     245.7          75.7               10.1 +/-    0.28      10.4 +/-    0.28  0.120 / 0.110
G05     171.1          17.4               11.9 +/-    2.10      28.0 +/-    2.10  0.090 / 0.130
G06     40.0           56.4                8.4 +/-    0.46       9.9 +/-    0.46  0.130 / 0.130
G12     321.0          52.1                8.9 +/-    0.80      10.9 +/-    0.80  0.080 / 0.130
G17     70.3           23.8                8.9 +/-    1.21      18.0 +/-    1.21  0.290 / 0.460
G19     59.3           36.3                7.2 +/-    0.78      11.2 +/-    0.78  0.200 / 0.360
G24     244.1          33.7               10.9 +/-    2.13      17.7 +/-    2.13  0.050 / 0.030
G25     316.5          12.7                4.8 +/-   18.38      12.6 +/-   18.38  0.040 / 0.050