PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-17:57:40
G02     212.8          53.2               12.1 +/-    1.66      14.7 +/-    1.66  0.040 / 0.110
G06     70.3           76.4               10.0 +/-    0.56      10.3 +/-    0.56  0.050 / 0.080
G12     317.9          35.0                8.4 +/-    1.54      13.4 +/-    1.54  0.050 / 0.070
G17     53.4           35.3                9.4 +/-    0.94      14.8 +/-    0.94  0.070 / 0.070
G19     29.2           54.7                9.3 +/-    0.75      11.1 +/-    0.75  0.100 / 0.400
G24     270.5          42.7                9.6 +/-    0.75      13.4 +/-    0.75  0.100 / 0.360
G28     119.1          17.5               11.6 +/-    2.36      27.1 +/-    2.36  0.060 / 0.070